./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:48:11,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:48:11,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:48:11,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:48:11,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:48:11,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:48:11,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:48:11,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:48:11,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:48:11,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:48:11,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:48:11,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:48:11,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:48:11,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:48:11,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:48:11,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:48:11,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:48:11,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:48:11,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:48:11,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:48:11,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:48:11,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:48:11,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:48:11,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:48:11,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:48:11,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:48:11,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:48:11,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:48:11,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:48:11,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:48:11,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:48:11,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:48:11,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:48:11,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:48:11,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:48:11,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:48:11,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:48:11,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:48:11,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:48:11,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:48:11,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:48:11,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:48:11,654 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:48:11,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:48:11,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:48:11,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:48:11,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:48:11,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:48:11,659 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:48:11,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:48:11,660 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:48:11,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:48:11,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:48:11,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:48:11,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:48:11,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:48:11,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:48:11,663 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:48:11,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:48:11,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:48:11,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:48:11,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:48:11,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:48:11,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:48:11,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:48:11,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:48:11,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:48:11,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:48:11,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:48:11,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:48:11,667 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:48:11,669 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:48:11,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:48:11,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:48:11,670 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_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2021-11-09 09:48:12,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:48:12,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:48:12,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:48:12,102 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:48:12,103 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:48:12,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-11-09 09:48:12,194 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/data/c8979264f/b6bda922fa7c4129b0d931230209a5eb/FLAG6204ab740 [2021-11-09 09:48:12,807 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:48:12,807 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-11-09 09:48:12,824 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/data/c8979264f/b6bda922fa7c4129b0d931230209a5eb/FLAG6204ab740 [2021-11-09 09:48:13,093 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/data/c8979264f/b6bda922fa7c4129b0d931230209a5eb [2021-11-09 09:48:13,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:48:13,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:48:13,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:48:13,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:48:13,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:48:13,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8656be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13, skipping insertion in model container [2021-11-09 09:48:13,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:48:13,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:48:13,518 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-11-09 09:48:13,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:48:13,562 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:48:13,622 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-11-09 09:48:13,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:48:13,719 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:48:13,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13 WrapperNode [2021-11-09 09:48:13,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:48:13,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:48:13,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:48:13,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:48:13,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:48:13,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:48:13,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:48:13,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:48:13,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:48:13,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:48:13,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:48:13,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:48:13,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13" (1/1) ... [2021-11-09 09:48:13,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:48:13,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:13,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:48:14,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:48:14,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:48:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 09:48:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:48:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 09:48:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:48:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-09 09:48:14,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:48:14,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:48:14,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:48:14,795 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:48:14,795 INFO L299 CfgBuilder]: Removed 137 assume(true) statements. [2021-11-09 09:48:14,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:48:14 BoogieIcfgContainer [2021-11-09 09:48:14,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:48:14,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:48:14,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:48:14,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:48:14,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:48:13" (1/3) ... [2021-11-09 09:48:14,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6163e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:48:14, skipping insertion in model container [2021-11-09 09:48:14,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:48:13" (2/3) ... [2021-11-09 09:48:14,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6163e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:48:14, skipping insertion in model container [2021-11-09 09:48:14,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:48:14" (3/3) ... [2021-11-09 09:48:14,831 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2021-11-09 09:48:14,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:48:14,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-09 09:48:14,919 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:48:14,933 INFO L339 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:48:14,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-09 09:48:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 127 states have (on average 1.9291338582677164) internal successors, (245), 147 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:48:14,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:14,959 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:14,960 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 09:48:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:14,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1439334733, now seen corresponding path program 1 times [2021-11-09 09:48:14,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:14,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190627399] [2021-11-09 09:48:14,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:14,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:15,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:15,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190627399] [2021-11-09 09:48:15,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190627399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:48:15,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:48:15,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:48:15,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159760632] [2021-11-09 09:48:15,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:48:15,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:15,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:48:15,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:48:15,189 INFO L87 Difference]: Start difference. First operand has 148 states, 127 states have (on average 1.9291338582677164) internal successors, (245), 147 states have internal predecessors, (245), 0 states have call successors, (0), 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 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:15,233 INFO L93 Difference]: Finished difference Result 294 states and 488 transitions. [2021-11-09 09:48:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:48:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 09:48:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:15,247 INFO L225 Difference]: With dead ends: 294 [2021-11-09 09:48:15,248 INFO L226 Difference]: Without dead ends: 142 [2021-11-09 09:48:15,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:48:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-09 09:48:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-09 09:48:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 122 states have (on average 1.2540983606557377) internal successors, (153), 141 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2021-11-09 09:48:15,318 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 13 [2021-11-09 09:48:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:15,319 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2021-11-09 09:48:15,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:15,320 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2021-11-09 09:48:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:48:15,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:15,321 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:15,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:48:15,322 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 09:48:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash 49746255, now seen corresponding path program 1 times [2021-11-09 09:48:15,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:15,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209118602] [2021-11-09 09:48:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:15,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:16,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:16,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209118602] [2021-11-09 09:48:16,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209118602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:48:16,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:48:16,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-09 09:48:16,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769380017] [2021-11-09 09:48:16,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:48:16,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:16,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:48:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:48:16,236 INFO L87 Difference]: Start difference. First operand 142 states and 153 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:17,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:17,191 INFO L93 Difference]: Finished difference Result 235 states and 253 transitions. [2021-11-09 09:48:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:48:17,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 09:48:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:17,195 INFO L225 Difference]: With dead ends: 235 [2021-11-09 09:48:17,197 INFO L226 Difference]: Without dead ends: 231 [2021-11-09 09:48:17,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:48:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-09 09:48:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 145. [2021-11-09 09:48:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 126 states have (on average 1.246031746031746) internal successors, (157), 144 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2021-11-09 09:48:17,233 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 28 [2021-11-09 09:48:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:17,234 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2021-11-09 09:48:17,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2021-11-09 09:48:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 09:48:17,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:17,237 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:17,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:48:17,237 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 09:48:17,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash 561700947, now seen corresponding path program 1 times [2021-11-09 09:48:17,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:17,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710487955] [2021-11-09 09:48:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:17,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:17,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:17,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710487955] [2021-11-09 09:48:17,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710487955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:48:17,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:48:17,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-09 09:48:17,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450817939] [2021-11-09 09:48:17,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:48:17,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:17,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:48:17,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:48:17,924 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:18,864 INFO L93 Difference]: Finished difference Result 250 states and 270 transitions. [2021-11-09 09:48:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:48:18,865 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 09:48:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:18,867 INFO L225 Difference]: With dead ends: 250 [2021-11-09 09:48:18,868 INFO L226 Difference]: Without dead ends: 246 [2021-11-09 09:48:18,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:48:18,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-09 09:48:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 145. [2021-11-09 09:48:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 127 states have (on average 1.236220472440945) internal successors, (157), 144 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2021-11-09 09:48:18,884 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 30 [2021-11-09 09:48:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:18,884 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2021-11-09 09:48:18,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2021-11-09 09:48:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 09:48:18,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:18,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:18,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:48:18,887 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 09:48:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:18,887 INFO L85 PathProgramCache]: Analyzing trace with hash 948434719, now seen corresponding path program 1 times [2021-11-09 09:48:18,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:18,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818726855] [2021-11-09 09:48:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:18,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:19,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:19,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818726855] [2021-11-09 09:48:19,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818726855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:48:19,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:48:19,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-09 09:48:19,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217190309] [2021-11-09 09:48:19,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:48:19,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:19,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:48:19,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:48:19,809 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:22,297 INFO L93 Difference]: Finished difference Result 324 states and 352 transitions. [2021-11-09 09:48:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:48:22,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 09:48:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:22,300 INFO L225 Difference]: With dead ends: 324 [2021-11-09 09:48:22,301 INFO L226 Difference]: Without dead ends: 320 [2021-11-09 09:48:22,302 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:48:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-09 09:48:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 151. [2021-11-09 09:48:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 133 states have (on average 1.2406015037593985) internal successors, (165), 150 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 165 transitions. [2021-11-09 09:48:22,321 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 165 transitions. Word has length 34 [2021-11-09 09:48:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:22,321 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 165 transitions. [2021-11-09 09:48:22,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 165 transitions. [2021-11-09 09:48:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:48:22,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:22,323 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:22,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:48:22,324 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 09:48:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash 911442849, now seen corresponding path program 1 times [2021-11-09 09:48:22,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:22,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678612361] [2021-11-09 09:48:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:22,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:22,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:22,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678612361] [2021-11-09 09:48:22,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678612361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:48:22,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:48:22,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-09 09:48:22,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539376961] [2021-11-09 09:48:22,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:48:22,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:48:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:48:22,970 INFO L87 Difference]: Start difference. First operand 151 states and 165 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-11-09 09:48:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:25,261 INFO L93 Difference]: Finished difference Result 236 states and 256 transitions. [2021-11-09 09:48:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:48:25,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 09:48:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:25,263 INFO L225 Difference]: With dead ends: 236 [2021-11-09 09:48:25,263 INFO L226 Difference]: Without dead ends: 234 [2021-11-09 09:48:25,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:48:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-09 09:48:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 149. [2021-11-09 09:48:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 132 states have (on average 1.2348484848484849) internal successors, (163), 148 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:25,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 163 transitions. [2021-11-09 09:48:25,278 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 163 transitions. Word has length 36 [2021-11-09 09:48:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:25,278 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 163 transitions. [2021-11-09 09:48:25,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-11-09 09:48:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 163 transitions. [2021-11-09 09:48:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:48:25,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:25,280 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:25,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:48:25,281 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 09:48:25,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:25,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1113716398, now seen corresponding path program 1 times [2021-11-09 09:48:25,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:25,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071075634] [2021-11-09 09:48:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:25,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:48:26,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:26,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071075634] [2021-11-09 09:48:26,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071075634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:48:26,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:48:26,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-09 09:48:26,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152454842] [2021-11-09 09:48:26,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:48:26,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:26,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:48:26,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:48:26,337 INFO L87 Difference]: Start difference. First operand 149 states and 163 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:28,431 INFO L93 Difference]: Finished difference Result 386 states and 420 transitions. [2021-11-09 09:48:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:48:28,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 09:48:28,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:28,434 INFO L225 Difference]: With dead ends: 386 [2021-11-09 09:48:28,434 INFO L226 Difference]: Without dead ends: 269 [2021-11-09 09:48:28,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:48:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-09 09:48:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 190. [2021-11-09 09:48:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 173 states have (on average 1.2023121387283238) internal successors, (208), 189 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 208 transitions. [2021-11-09 09:48:28,468 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 208 transitions. Word has length 38 [2021-11-09 09:48:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:28,468 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 208 transitions. [2021-11-09 09:48:28,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 208 transitions. [2021-11-09 09:48:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 09:48:28,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:28,470 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:28,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:48:28,471 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 09:48:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash 16635483, now seen corresponding path program 1 times [2021-11-09 09:48:28,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:28,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390209644] [2021-11-09 09:48:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:28,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:29,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:29,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390209644] [2021-11-09 09:48:29,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390209644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:48:29,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:48:29,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-09 09:48:29,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899987116] [2021-11-09 09:48:29,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:48:29,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:29,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:48:29,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:48:29,404 INFO L87 Difference]: Start difference. First operand 190 states and 208 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:31,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:31,971 INFO L93 Difference]: Finished difference Result 270 states and 294 transitions. [2021-11-09 09:48:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:48:31,972 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 09:48:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:31,974 INFO L225 Difference]: With dead ends: 270 [2021-11-09 09:48:31,974 INFO L226 Difference]: Without dead ends: 268 [2021-11-09 09:48:31,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:48:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-09 09:48:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 188. [2021-11-09 09:48:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 172 states have (on average 1.191860465116279) internal successors, (205), 187 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 205 transitions. [2021-11-09 09:48:31,999 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 205 transitions. Word has length 39 [2021-11-09 09:48:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:32,000 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 205 transitions. [2021-11-09 09:48:32,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 205 transitions. [2021-11-09 09:48:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 09:48:32,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:32,002 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:32,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:48:32,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 09:48:32,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:32,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2092365406, now seen corresponding path program 1 times [2021-11-09 09:48:32,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:32,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897841009] [2021-11-09 09:48:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:32,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:33,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:33,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897841009] [2021-11-09 09:48:33,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897841009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:33,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394658823] [2021-11-09 09:48:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:33,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:33,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:33,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:33,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:48:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-09 09:48:33,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:33,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 12 [2021-11-09 09:48:34,392 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-09 09:48:34,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-11-09 09:48:34,666 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:48:34,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 09:48:34,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:48:35,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:35,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:35,370 INFO L354 Elim1Store]: treesize reduction 56, result has 30.0 percent of original size [2021-11-09 09:48:35,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 59 [2021-11-09 09:48:35,626 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:48:35,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 101 treesize of output 75 [2021-11-09 09:48:35,649 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:48:35,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 58 [2021-11-09 09:48:36,022 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:48:36,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-09 09:48:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:36,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-11-09 09:48:36,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:36,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:36,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:48:36,578 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:48:36,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 60 [2021-11-09 09:48:36,900 INFO L354 Elim1Store]: treesize reduction 78, result has 19.6 percent of original size [2021-11-09 09:48:36,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 157 treesize of output 132 [2021-11-09 09:48:36,925 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-09 09:48:36,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 145 [2021-11-09 09:48:37,481 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-09 09:48:37,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 166 treesize of output 167 [2021-11-09 09:48:37,517 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-09 09:48:37,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 162 treesize of output 115 [2021-11-09 09:48:37,904 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-11-09 09:48:37,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-11-09 09:48:38,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:38,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:38,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:38,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:48:38,435 INFO L354 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2021-11-09 09:48:38,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 214 treesize of output 222 [2021-11-09 09:48:38,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:38,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:38,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:48:38,503 INFO L354 Elim1Store]: treesize reduction 112, result has 20.6 percent of original size [2021-11-09 09:48:38,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 210 treesize of output 158 [2021-11-09 09:48:39,142 INFO L354 Elim1Store]: treesize reduction 218, result has 13.1 percent of original size [2021-11-09 09:48:39,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 33 case distinctions, treesize of input 282 treesize of output 213 [2021-11-09 09:48:39,224 INFO L354 Elim1Store]: treesize reduction 272, result has 11.1 percent of original size [2021-11-09 09:48:39,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 360 treesize of output 327 [2021-11-09 09:48:41,915 INFO L354 Elim1Store]: treesize reduction 222, result has 1.3 percent of original size [2021-11-09 09:48:41,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 319 treesize of output 261 [2021-11-09 09:48:42,865 INFO L354 Elim1Store]: treesize reduction 178, result has 7.8 percent of original size [2021-11-09 09:48:42,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 45 case distinctions, treesize of input 238 treesize of output 95 [2021-11-09 09:48:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:42,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394658823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:42,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:42,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2021-11-09 09:48:42,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038987619] [2021-11-09 09:48:42,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 09:48:42,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:42,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 09:48:42,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:48:42,916 INFO L87 Difference]: Start difference. First operand 188 states and 205 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:34,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:34,005 INFO L93 Difference]: Finished difference Result 701 states and 765 transitions. [2021-11-09 09:53:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 09:53:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 09:53:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:34,012 INFO L225 Difference]: With dead ends: 701 [2021-11-09 09:53:34,012 INFO L226 Difference]: Without dead ends: 697 [2021-11-09 09:53:34,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 188.6s TimeCoverageRelationStatistics Valid=1055, Invalid=5660, Unknown=91, NotChecked=0, Total=6806 [2021-11-09 09:53:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-11-09 09:53:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 196. [2021-11-09 09:53:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 180 states have (on average 1.1944444444444444) internal successors, (215), 195 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 215 transitions. [2021-11-09 09:53:34,069 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 215 transitions. Word has length 44 [2021-11-09 09:53:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:34,070 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 215 transitions. [2021-11-09 09:53:34,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 215 transitions. [2021-11-09 09:53:34,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 09:53:34,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:34,072 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:34,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:34,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:34,299 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 09:53:34,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:34,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1233129393, now seen corresponding path program 2 times [2021-11-09 09:53:34,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:34,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208859555] [2021-11-09 09:53:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:34,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:53:36,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:36,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208859555] [2021-11-09 09:53:36,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208859555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:36,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243532609] [2021-11-09 09:53:36,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:53:36,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:36,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:36,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:36,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:53:37,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:53:37,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:37,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 170 conjunts are in the unsatisfiable core [2021-11-09 09:53:37,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:38,087 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-11-09 09:53:38,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 34 [2021-11-09 09:53:38,348 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-09 09:53:38,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-11-09 09:53:39,012 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-09 09:53:39,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 59 [2021-11-09 09:53:39,059 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-09 09:53:39,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 42 [2021-11-09 09:53:39,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-09 09:53:39,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-09 09:53:39,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:39,899 INFO L354 Elim1Store]: treesize reduction 66, result has 21.4 percent of original size [2021-11-09 09:53:39,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 53 [2021-11-09 09:53:40,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:40,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:40,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 09:53:40,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:40,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:40,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:40,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2021-11-09 09:53:40,899 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-09 09:53:40,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 153 treesize of output 122 [2021-11-09 09:53:40,954 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 09:53:40,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 155 treesize of output 112 [2021-11-09 09:53:41,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:41,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:41,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:41,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:41,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:41,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:41,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:41,670 INFO L354 Elim1Store]: treesize reduction 96, result has 26.7 percent of original size [2021-11-09 09:53:41,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 45 treesize of output 73 [2021-11-09 09:53:42,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:42,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:42,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:53:42,363 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-09 09:53:42,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 148 treesize of output 123 [2021-11-09 09:53:42,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:42,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:42,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:42,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:53:42,411 INFO L354 Elim1Store]: treesize reduction 88, result has 20.7 percent of original size [2021-11-09 09:53:42,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 148 treesize of output 160 [2021-11-09 09:53:42,959 INFO L354 Elim1Store]: treesize reduction 140, result has 13.6 percent of original size [2021-11-09 09:53:42,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 222 treesize of output 168 [2021-11-09 09:53:43,038 INFO L354 Elim1Store]: treesize reduction 272, result has 11.1 percent of original size [2021-11-09 09:53:43,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 256 treesize of output 223 [2021-11-09 09:53:43,889 INFO L354 Elim1Store]: treesize reduction 172, result has 13.6 percent of original size [2021-11-09 09:53:43,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 219 treesize of output 229 [2021-11-09 09:53:43,977 INFO L354 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2021-11-09 09:53:43,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 17 case distinctions, treesize of input 215 treesize of output 147 [2021-11-09 09:53:44,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,642 INFO L354 Elim1Store]: treesize reduction 48, result has 37.7 percent of original size [2021-11-09 09:53:44,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 50 [2021-11-09 09:53:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:45,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:45,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:53:45,322 INFO L354 Elim1Store]: treesize reduction 144, result has 16.8 percent of original size [2021-11-09 09:53:45,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 288 treesize of output 203 [2021-11-09 09:53:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:45,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:53:45,419 INFO L354 Elim1Store]: treesize reduction 276, result has 16.1 percent of original size [2021-11-09 09:53:45,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 288 treesize of output 305 [2021-11-09 09:53:46,028 INFO L354 Elim1Store]: treesize reduction 296, result has 10.8 percent of original size [2021-11-09 09:53:46,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 42 case distinctions, treesize of input 369 treesize of output 255 [2021-11-09 09:53:46,159 INFO L354 Elim1Store]: treesize reduction 536, result has 8.8 percent of original size [2021-11-09 09:53:46,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 407 treesize of output 383 [2021-11-09 09:53:52,077 INFO L354 Elim1Store]: treesize reduction 374, result has 7.7 percent of original size [2021-11-09 09:53:52,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 400 treesize of output 217 [2021-11-09 09:53:52,218 INFO L354 Elim1Store]: treesize reduction 350, result has 2.0 percent of original size [2021-11-09 09:53:52,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 55 case distinctions, treesize of input 170 treesize of output 130 [2021-11-09 09:53:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:53:52,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243532609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:52,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:52,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-11-09 09:53:52,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185756056] [2021-11-09 09:53:52,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:53:52,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:52,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:53:52,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:53:52,332 INFO L87 Difference]: Start difference. First operand 196 states and 215 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:54:44,613 INFO L93 Difference]: Finished difference Result 636 states and 697 transitions. [2021-11-09 09:54:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 09:54:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 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 48 [2021-11-09 09:54:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:54:44,618 INFO L225 Difference]: With dead ends: 636 [2021-11-09 09:54:44,618 INFO L226 Difference]: Without dead ends: 517 [2021-11-09 09:54:44,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=562, Invalid=4130, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 09:54:44,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-09 09:54:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 282. [2021-11-09 09:54:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 266 states have (on average 1.1578947368421053) internal successors, (308), 281 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 308 transitions. [2021-11-09 09:54:44,693 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 308 transitions. Word has length 48 [2021-11-09 09:54:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:54:44,693 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 308 transitions. [2021-11-09 09:54:44,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:44,694 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 308 transitions. [2021-11-09 09:54:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 09:54:44,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:54:44,695 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:54:44,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:54:44,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:54:44,906 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 09:54:44,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:54:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash 96632384, now seen corresponding path program 1 times [2021-11-09 09:54:44,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:54:44,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693389683] [2021-11-09 09:54:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:54:44,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:54:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:54:45,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:54:45,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693389683] [2021-11-09 09:54:45,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693389683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:45,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779912070] [2021-11-09 09:54:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:54:45,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:54:45,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:54:45,335 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:54:45,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:54:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:46,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-09 09:54:46,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:54:46,687 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-09 09:54:46,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-11-09 09:54:47,453 INFO L354 Elim1Store]: treesize reduction 46, result has 44.6 percent of original size [2021-11-09 09:54:47,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 76 [2021-11-09 09:54:47,483 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-09 09:54:47,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 90 [2021-11-09 09:55:11,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2021-11-09 09:55:12,031 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-11-09 09:55:12,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 46 [2021-11-09 09:55:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:55:12,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779912070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:12,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:12,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-09 09:55:12,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925067912] [2021-11-09 09:55:12,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:55:12,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:55:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:55:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=429, Unknown=10, NotChecked=0, Total=506 [2021-11-09 09:55:12,057 INFO L87 Difference]: Start difference. First operand 282 states and 308 transitions. Second operand has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:57:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:57:53,414 INFO L93 Difference]: Finished difference Result 503 states and 546 transitions. [2021-11-09 09:57:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:57:53,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 0 states have call successors, (0), 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 48 [2021-11-09 09:57:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:57:53,418 INFO L225 Difference]: With dead ends: 503 [2021-11-09 09:57:53,418 INFO L226 Difference]: Without dead ends: 501 [2021-11-09 09:57:53,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=328, Invalid=1459, Unknown=19, NotChecked=0, Total=1806 [2021-11-09 09:57:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-09 09:57:53,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 287. [2021-11-09 09:57:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 271 states have (on average 1.1586715867158672) internal successors, (314), 286 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:57:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 314 transitions. [2021-11-09 09:57:53,509 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 314 transitions. Word has length 48 [2021-11-09 09:57:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:57:53,509 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 314 transitions. [2021-11-09 09:57:53,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:57:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 314 transitions. [2021-11-09 09:57:53,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:57:53,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:57:53,512 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:57:53,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-09 09:57:53,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:57:53,739 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 09:57:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:57:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1625364732, now seen corresponding path program 1 times [2021-11-09 09:57:53,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:57:53,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251216452] [2021-11-09 09:57:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:57:53,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:57:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:57:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:57:54,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:57:54,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251216452] [2021-11-09 09:57:54,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251216452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:57:54,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577484144] [2021-11-09 09:57:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:57:54,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:57:54,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:57:54,133 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:57:54,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:57:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:57:55,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-09 09:57:55,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:57:55,286 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-09 09:57:55,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-11-09 09:57:55,864 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-09 09:57:55,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 65 [2021-11-09 09:57:55,909 INFO L354 Elim1Store]: treesize reduction 46, result has 44.6 percent of original size [2021-11-09 09:57:55,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 76 [2021-11-09 09:58:23,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2021-11-09 09:58:23,183 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-11-09 09:58:23,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-09 09:58:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:58:23,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577484144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:58:23,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:58:23,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-09 09:58:23,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072780260] [2021-11-09 09:58:23,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:58:23,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:58:23,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:58:23,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=428, Unknown=11, NotChecked=0, Total=506 [2021-11-09 09:58:23,240 INFO L87 Difference]: Start difference. First operand 287 states and 314 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:01:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:01:42,852 INFO L93 Difference]: Finished difference Result 501 states and 544 transitions. [2021-11-09 10:01:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:01:42,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 10:01:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:01:42,857 INFO L225 Difference]: With dead ends: 501 [2021-11-09 10:01:42,858 INFO L226 Difference]: Without dead ends: 499 [2021-11-09 10:01:42,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 52.9s TimeCoverageRelationStatistics Valid=288, Invalid=1332, Unknown=20, NotChecked=0, Total=1640 [2021-11-09 10:01:42,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-09 10:01:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 289. [2021-11-09 10:01:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 273 states have (on average 1.1575091575091576) internal successors, (316), 288 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:01:43,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 316 transitions. [2021-11-09 10:01:43,013 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 316 transitions. Word has length 50 [2021-11-09 10:01:43,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:01:43,013 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 316 transitions. [2021-11-09 10:01:43,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:01:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 316 transitions. [2021-11-09 10:01:43,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:01:43,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:01:43,016 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:01:43,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:01:43,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 10:01:43,243 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 10:01:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:01:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash -325569595, now seen corresponding path program 2 times [2021-11-09 10:01:43,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:01:43,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323541737] [2021-11-09 10:01:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:01:43,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:01:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:01:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:01:43,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:01:43,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323541737] [2021-11-09 10:01:43,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323541737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:01:43,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848064551] [2021-11-09 10:01:43,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:01:43,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:01:43,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:01:43,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:01:43,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:01:45,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:01:45,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:01:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-09 10:01:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:01:46,012 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:01:46,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 10:01:46,553 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 10:01:46,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 18 [2021-11-09 10:01:46,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-09 10:01:47,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:01:47,294 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 10:01:47,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2021-11-09 10:01:47,574 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 10:01:47,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 88 [2021-11-09 10:01:47,619 INFO L354 Elim1Store]: treesize reduction 78, result has 25.0 percent of original size [2021-11-09 10:01:47,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 81 treesize of output 65 [2021-11-09 10:01:48,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-09 10:01:48,212 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-09 10:01:48,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 74 treesize of output 68 [2021-11-09 10:01:48,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_alloc_node_~ptr~0.base] [2021-11-09 10:01:48,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:01:48,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-09 10:01:48,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647420806] [2021-11-09 10:01:48,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 10:01:48,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:01:48,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 10:01:48,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:01:48,401 INFO L87 Difference]: Start difference. First operand 289 states and 316 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:01:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:01:49,866 INFO L93 Difference]: Finished difference Result 421 states and 458 transitions. [2021-11-09 10:01:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:01:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 10:01:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:01:49,870 INFO L225 Difference]: With dead ends: 421 [2021-11-09 10:01:49,871 INFO L226 Difference]: Without dead ends: 419 [2021-11-09 10:01:49,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:01:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-09 10:01:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 287. [2021-11-09 10:01:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 272 states have (on average 1.1544117647058822) internal successors, (314), 286 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:01:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 314 transitions. [2021-11-09 10:01:50,002 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 314 transitions. Word has length 50 [2021-11-09 10:01:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:01:50,003 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 314 transitions. [2021-11-09 10:01:50,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:01:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 314 transitions. [2021-11-09 10:01:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:01:50,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:01:50,004 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:01:50,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:01:50,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 10:01:50,226 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 17 more)] === [2021-11-09 10:01:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:01:50,227 INFO L85 PathProgramCache]: Analyzing trace with hash 660426569, now seen corresponding path program 2 times [2021-11-09 10:01:50,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:01:50,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101372101] [2021-11-09 10:01:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:01:50,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:01:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:01:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:01:50,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:01:50,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101372101] [2021-11-09 10:01:50,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101372101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:01:50,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991828600] [2021-11-09 10:01:50,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:01:50,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:01:50,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:01:50,722 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:01:50,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74ad51fd-3953-40e3-8aa9-edc08770e0c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:01:52,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:01:52,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:01:52,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-09 10:01:52,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:01:52,754 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-11-09 10:01:52,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 34 [2021-11-09 10:01:52,964 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-09 10:01:52,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-11-09 10:01:53,481 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 10:01:53,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 31 [2021-11-09 10:01:53,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 31 [2021-11-09 10:01:54,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:01:54,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:01:54,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:01:54,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 50 [2021-11-09 10:01:54,691 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-09 10:01:54,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 131 treesize of output 92 [2021-11-09 10:01:54,711 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 10:01:54,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 84 [2021-11-09 10:01:55,168 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:01:55,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 64 [2021-11-09 10:01:55,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-09 10:01:55,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:01:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:01:55,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:01:55,926 INFO L354 Elim1Store]: treesize reduction 147, result has 21.0 percent of original size [2021-11-09 10:01:55,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 146 [2021-11-09 10:01:55,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:01:55,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:01:55,951 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-09 10:01:55,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 174 [2021-11-09 10:01:56,665 INFO L354 Elim1Store]: treesize reduction 356, result has 22.6 percent of original size [2021-11-09 10:01:56,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 257 treesize of output 261 [2021-11-09 10:01:56,742 INFO L354 Elim1Store]: treesize reduction 292, result has 12.8 percent of original size [2021-11-09 10:01:56,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 365 treesize of output 333