./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array8_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array8_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY --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 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:28:40,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:28:40,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:28:40,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:28:40,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:28:40,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:28:40,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:28:40,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:28:40,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:28:40,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:28:40,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:28:40,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:28:40,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:28:40,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:28:40,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:28:40,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:28:40,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:28:40,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:28:40,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:28:40,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:28:40,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:28:40,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:28:40,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:28:40,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:28:40,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:28:40,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:28:40,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:28:40,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:28:40,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:28:40,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:28:40,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:28:40,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:28:40,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:28:40,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:28:40,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:28:40,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:28:40,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:28:40,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:28:40,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:28:40,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:28:40,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:28:40,712 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:28:40,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:28:40,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:28:40,780 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:28:40,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:28:40,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:28:40,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:28:40,790 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:28:40,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:28:40,790 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:28:40,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:28:40,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:28:40,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:28:40,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:28:40,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:28:40,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:28:40,793 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:28:40,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:28:40,793 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:28:40,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:28:40,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:28:40,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:28:40,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:28:40,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:28:40,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:28:40,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:28:40,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:28:40,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:28:40,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:28:40,797 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:28:40,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:28:40,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:28:40,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:28:40,798 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_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 [2021-11-07 07:28:41,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:28:41,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:28:41,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:28:41,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:28:41,130 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:28:41,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-patterns/array8_pattern.c [2021-11-07 07:28:41,205 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/data/2b470a5ad/24612b2a1d884f29b8b7c333e88efc38/FLAG6a4614439 [2021-11-07 07:28:41,741 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:28:41,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/sv-benchmarks/c/array-patterns/array8_pattern.c [2021-11-07 07:28:41,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/data/2b470a5ad/24612b2a1d884f29b8b7c333e88efc38/FLAG6a4614439 [2021-11-07 07:28:42,053 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/data/2b470a5ad/24612b2a1d884f29b8b7c333e88efc38 [2021-11-07 07:28:42,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:28:42,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:28:42,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:28:42,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:28:42,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:28:42,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@241d5e5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42, skipping insertion in model container [2021-11-07 07:28:42,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:28:42,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:28:42,288 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_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2021-11-07 07:28:42,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:28:42,324 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:28:42,337 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_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2021-11-07 07:28:42,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:28:42,366 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:28:42,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42 WrapperNode [2021-11-07 07:28:42,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:28:42,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:28:42,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:28:42,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:28:42,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:28:42,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:28:42,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:28:42,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:28:42,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:28:42,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:28:42,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:28:42,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:28:42,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42" (1/1) ... [2021-11-07 07:28:42,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:28:42,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:28:42,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:28:42,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:28:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:28:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:28:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:28:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:28:42,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:28:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 07:28:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:28:42,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:28:42,819 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 07:28:42,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:28:42 BoogieIcfgContainer [2021-11-07 07:28:42,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:28:42,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:28:42,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:28:42,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:28:42,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:28:42" (1/3) ... [2021-11-07 07:28:42,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d9a801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:28:42, skipping insertion in model container [2021-11-07 07:28:42,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:42" (2/3) ... [2021-11-07 07:28:42,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d9a801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:28:42, skipping insertion in model container [2021-11-07 07:28:42,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:28:42" (3/3) ... [2021-11-07 07:28:42,833 INFO L111 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2021-11-07 07:28:42,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:28:42,840 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:28:42,900 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:28:42,908 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 [2021-11-07 07:28:42,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:28:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) [2021-11-07 07:28:42,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:28:42,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:42,952 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:28:42,953 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:28:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:42,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1209864113, now seen corresponding path program 1 times [2021-11-07 07:28:42,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:28:42,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359152439] [2021-11-07 07:28:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:42,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:28:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:28:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:43,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:43,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359152439] [2021-11-07 07:28:43,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359152439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:28:43,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:28:43,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:28:43,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616920128] [2021-11-07 07:28:43,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:28:43,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:28:43,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:28:43,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:28:43,268 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:43,286 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-11-07 07:28:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:28:43,288 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 07:28:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:43,298 INFO L225 Difference]: With dead ends: 45 [2021-11-07 07:28:43,298 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 07:28:43,301 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 [2021-11-07 07:28:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 07:28:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-07 07:28:43,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-07 07:28:43,339 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-11-07 07:28:43,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:43,340 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-07 07:28:43,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:43,341 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-07 07:28:43,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 07:28:43,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:43,342 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:28:43,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:28:43,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:28:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:43,344 INFO L85 PathProgramCache]: Analyzing trace with hash -53034967, now seen corresponding path program 1 times [2021-11-07 07:28:43,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:28:43,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334027440] [2021-11-07 07:28:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:43,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:28:43,390 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:28:43,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364559338] [2021-11-07 07:28:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:43,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:43,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:28:43,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:28:43,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:28:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:28:43,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:28:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:43,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:43,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334027440] [2021-11-07 07:28:43,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:28:43,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364559338] [2021-11-07 07:28:43,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364559338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:28:43,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:28:43,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:28:43,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771225087] [2021-11-07 07:28:43,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:28:43,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:28:43,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:28:43,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:28:43,667 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:43,771 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-11-07 07:28:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:28:43,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 07:28:43,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:43,772 INFO L225 Difference]: With dead ends: 39 [2021-11-07 07:28:43,772 INFO L226 Difference]: Without dead ends: 25 [2021-11-07 07:28:43,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:28:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-07 07:28:43,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-07 07:28:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-07 07:28:43,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-11-07 07:28:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:43,779 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-07 07:28:43,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:43,780 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-07 07:28:43,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 07:28:43,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:43,781 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] [2021-11-07 07:28:43,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:28:44,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:44,004 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:28:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1988729303, now seen corresponding path program 1 times [2021-11-07 07:28:44,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:28:44,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931525043] [2021-11-07 07:28:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:44,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:28:44,071 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:28:44,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715535362] [2021-11-07 07:28:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:44,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:44,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:28:44,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:28:44,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:28:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:28:44,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:28:44,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:44,257 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 10 treesize of output 8 [2021-11-07 07:28:44,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-07 07:28:44,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 07:28:44,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 28 [2021-11-07 07:28:45,278 INFO L354 Elim1Store]: treesize reduction 41, result has 6.8 percent of original size [2021-11-07 07:28:45,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2021-11-07 07:28:45,588 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-11-07 07:28:45,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 28 [2021-11-07 07:28:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:45,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:45,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931525043] [2021-11-07 07:28:45,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:28:45,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715535362] [2021-11-07 07:28:45,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715535362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:28:45,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:28:45,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-07 07:28:45,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108495251] [2021-11-07 07:28:45,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:28:45,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:28:45,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:28:45,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:28:45,725 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:46,032 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-11-07 07:28:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:28:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-07 07:28:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:46,035 INFO L225 Difference]: With dead ends: 63 [2021-11-07 07:28:46,035 INFO L226 Difference]: Without dead ends: 47 [2021-11-07 07:28:46,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:28:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-07 07:28:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2021-11-07 07:28:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-07 07:28:46,050 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2021-11-07 07:28:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:46,051 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-07 07:28:46,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-07 07:28:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 07:28:46,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:46,053 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:28:46,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:28:46,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-07 07:28:46,280 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:28:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:46,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1878256007, now seen corresponding path program 2 times [2021-11-07 07:28:46,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:28:46,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075311210] [2021-11-07 07:28:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:46,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:28:46,312 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:28:46,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815458271] [2021-11-07 07:28:46,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:28:46,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:46,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:28:46,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:28:46,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:28:46,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:28:46,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:28:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:28:46,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:46,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:46,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075311210] [2021-11-07 07:28:46,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:28:46,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815458271] [2021-11-07 07:28:46,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815458271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:28:46,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:28:46,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 07:28:46,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184599501] [2021-11-07 07:28:46,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:28:46,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:28:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:28:46,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:28:46,581 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:46,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:46,709 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-11-07 07:28:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:28:46,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 07:28:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:46,711 INFO L225 Difference]: With dead ends: 56 [2021-11-07 07:28:46,711 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 07:28:46,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:28:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 07:28:46,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2021-11-07 07:28:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-11-07 07:28:46,720 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 23 [2021-11-07 07:28:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:46,720 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-11-07 07:28:46,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-11-07 07:28:46,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 07:28:46,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:46,722 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:28:46,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:28:46,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:46,943 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:28:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:46,944 INFO L85 PathProgramCache]: Analyzing trace with hash 144820555, now seen corresponding path program 3 times [2021-11-07 07:28:46,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:28:46,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615270288] [2021-11-07 07:28:46,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:46,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:28:46,965 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:28:46,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659765224] [2021-11-07 07:28:46,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:28:46,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:46,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:28:46,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:28:46,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:28:47,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 07:28:47,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:28:47,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:28:47,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:47,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:47,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615270288] [2021-11-07 07:28:47,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:28:47,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659765224] [2021-11-07 07:28:47,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659765224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:28:47,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:28:47,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 07:28:47,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913014711] [2021-11-07 07:28:47,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:28:47,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:28:47,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:28:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:28:47,240 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:47,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:47,320 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-11-07 07:28:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:28:47,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 07:28:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:47,324 INFO L225 Difference]: With dead ends: 59 [2021-11-07 07:28:47,325 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 07:28:47,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:28:47,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 07:28:47,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-11-07 07:28:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:47,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-11-07 07:28:47,345 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 23 [2021-11-07 07:28:47,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:47,346 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-11-07 07:28:47,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:47,346 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-11-07 07:28:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 07:28:47,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:47,348 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:28:47,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:28:47,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:47,564 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:28:47,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:47,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1170992425, now seen corresponding path program 4 times [2021-11-07 07:28:47,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:28:47,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455703341] [2021-11-07 07:28:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:47,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:28:47,584 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:28:47,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706375716] [2021-11-07 07:28:47,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:28:47,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:47,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:28:47,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:28:47,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:28:47,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:28:47,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:28:47,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:28:47,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:47,789 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 10 treesize of output 8 [2021-11-07 07:28:47,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-07 07:28:47,928 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 07:28:47,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 43 [2021-11-07 07:28:48,552 INFO L354 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2021-11-07 07:28:48,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 71 [2021-11-07 07:28:48,932 INFO L354 Elim1Store]: treesize reduction 111, result has 22.4 percent of original size [2021-11-07 07:28:48,933 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 8 case distinctions, treesize of input 88 treesize of output 106 [2021-11-07 07:28:49,928 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-11-07 07:28:49,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 39 [2021-11-07 07:28:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:50,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:50,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455703341] [2021-11-07 07:28:50,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:28:50,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706375716] [2021-11-07 07:28:50,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706375716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:28:50,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:28:50,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-07 07:28:50,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159835889] [2021-11-07 07:28:50,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:28:50,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:28:50,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:28:50,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:28:50,123 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:51,447 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2021-11-07 07:28:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:28:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 07:28:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:51,448 INFO L225 Difference]: With dead ends: 75 [2021-11-07 07:28:51,449 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 07:28:51,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:28:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 07:28:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2021-11-07 07:28:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-07 07:28:51,459 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 25 [2021-11-07 07:28:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:51,460 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-07 07:28:51,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-07 07:28:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 07:28:51,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:51,461 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:28:51,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:28:51,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 07:28:51,668 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:28:51,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:51,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1429157863, now seen corresponding path program 1 times [2021-11-07 07:28:51,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:28:51,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513117319] [2021-11-07 07:28:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:51,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:28:51,691 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:28:51,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319592469] [2021-11-07 07:28:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:51,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:51,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:28:51,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:28:51,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:28:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:28:51,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 07:28:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:51,944 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 10 treesize of output 8 [2021-11-07 07:28:51,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-07 07:28:52,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:28:52,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:28:52,116 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 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-07 07:28:52,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:28:52,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:28:52,877 INFO L354 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2021-11-07 07:28:52,877 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 2 case distinctions, treesize of input 52 treesize of output 72 [2021-11-07 07:28:53,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:28:53,352 INFO L354 Elim1Store]: treesize reduction 193, result has 11.9 percent of original size [2021-11-07 07:28:53,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 60 [2021-11-07 07:28:53,921 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-07 07:28:53,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 42 [2021-11-07 07:28:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:54,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:54,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513117319] [2021-11-07 07:28:54,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:28:54,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319592469] [2021-11-07 07:28:54,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319592469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:28:54,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:28:54,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-07 07:28:54,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822983523] [2021-11-07 07:28:54,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:28:54,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:28:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:28:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:28:54,079 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:54,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:54,930 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2021-11-07 07:28:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:28:54,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 07:28:54,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:54,932 INFO L225 Difference]: With dead ends: 79 [2021-11-07 07:28:54,932 INFO L226 Difference]: Without dead ends: 75 [2021-11-07 07:28:54,932 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:28:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-07 07:28:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2021-11-07 07:28:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-07 07:28:54,943 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 25 [2021-11-07 07:28:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:54,944 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-07 07:28:54,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-07 07:28:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:28:54,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:54,946 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:28:54,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:28:55,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-07 07:28:55,160 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:28:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:55,160 INFO L85 PathProgramCache]: Analyzing trace with hash -520318585, now seen corresponding path program 5 times [2021-11-07 07:28:55,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:28:55,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835949772] [2021-11-07 07:28:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:55,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:28:55,180 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:28:55,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738807727] [2021-11-07 07:28:55,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:28:55,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:55,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:28:55,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:28:55,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:28:55,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-07 07:28:55,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:28:55,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:28:55,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:55,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:55,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835949772] [2021-11-07 07:28:55,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:28:55,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738807727] [2021-11-07 07:28:55,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738807727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:28:55,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:28:55,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 07:28:55,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333014407] [2021-11-07 07:28:55,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:28:55,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:28:55,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:28:55,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:28:55,562 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:55,701 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-11-07 07:28:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:28:55,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 07:28:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:55,703 INFO L225 Difference]: With dead ends: 85 [2021-11-07 07:28:55,703 INFO L226 Difference]: Without dead ends: 81 [2021-11-07 07:28:55,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:28:55,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-07 07:28:55,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2021-11-07 07:28:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-11-07 07:28:55,714 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 27 [2021-11-07 07:28:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:55,715 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-11-07 07:28:55,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-11-07 07:28:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:28:55,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:55,717 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:28:55,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:28:55,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:55,920 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:28:55,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:55,920 INFO L85 PathProgramCache]: Analyzing trace with hash 95522891, now seen corresponding path program 6 times [2021-11-07 07:28:55,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:28:55,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578319993] [2021-11-07 07:28:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:55,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:28:55,932 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:28:55,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996307522] [2021-11-07 07:28:55,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:28:55,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:55,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:28:55,947 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:28:55,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:28:56,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-07 07:28:56,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:28:56,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:28:56,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:56,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:56,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578319993] [2021-11-07 07:28:56,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:28:56,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996307522] [2021-11-07 07:28:56,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996307522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:28:56,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:28:56,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 07:28:56,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573937762] [2021-11-07 07:28:56,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:28:56,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:28:56,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:28:56,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:28:56,424 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:56,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:56,570 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2021-11-07 07:28:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:28:56,571 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 07:28:56,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:56,572 INFO L225 Difference]: With dead ends: 88 [2021-11-07 07:28:56,572 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 07:28:56,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:28:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 07:28:56,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-11-07 07:28:56,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-11-07 07:28:56,593 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 27 [2021-11-07 07:28:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:56,593 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-11-07 07:28:56,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:28:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-11-07 07:28:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:28:56,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:56,595 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:28:56,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:28:56,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:56,823 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:28:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1969860380, now seen corresponding path program 1 times [2021-11-07 07:28:56,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:28:56,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971951686] [2021-11-07 07:28:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:56,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:28:56,840 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:28:56,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065625245] [2021-11-07 07:28:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:56,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:28:56,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:28:56,842 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:28:56,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:28:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:28:57,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 07:28:57,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:57,158 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 10 treesize of output 8 [2021-11-07 07:28:57,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-07 07:28:57,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 07:28:57,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 34 treesize of output 29 [2021-11-07 07:28:57,915 INFO L354 Elim1Store]: treesize reduction 41, result has 6.8 percent of original size [2021-11-07 07:28:57,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 44 [2021-11-07 07:28:58,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:58,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971951686] [2021-11-07 07:28:58,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:28:58,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065625245] [2021-11-07 07:28:58,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~index~0] [2021-11-07 07:28:58,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:28:58,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 07:28:58,057 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-07 07:28:58,057 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 07:28:58,072 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 07:28:58,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:28:58,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:28:58,291 INFO L731 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1] [2021-11-07 07:28:58,294 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 07:28:58,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:28:58 BoogieIcfgContainer [2021-11-07 07:28:58,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 07:28:58,313 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 07:28:58,314 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 07:28:58,315 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 07:28:58,315 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:28:42" (3/4) ... [2021-11-07 07:28:58,319 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 07:28:58,322 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 07:28:58,323 INFO L168 Benchmark]: Toolchain (without parser) took 16265.17 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 77.0 MB in the beginning and 105.3 MB in the end (delta: -28.3 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:28:58,324 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory was 83.9 MB in the beginning and 83.9 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:28:58,325 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.43 ms. Allocated memory is still 113.2 MB. Free memory was 76.9 MB in the beginning and 87.3 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:28:58,326 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.88 ms. Allocated memory is still 113.2 MB. Free memory was 87.3 MB in the beginning and 85.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:28:58,326 INFO L168 Benchmark]: Boogie Preprocessor took 29.83 ms. Allocated memory is still 113.2 MB. Free memory was 85.7 MB in the beginning and 84.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:28:58,327 INFO L168 Benchmark]: RCFGBuilder took 381.14 ms. Allocated memory is still 113.2 MB. Free memory was 84.1 MB in the beginning and 73.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 07:28:58,328 INFO L168 Benchmark]: TraceAbstraction took 15487.45 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 72.6 MB in the beginning and 105.3 MB in the end (delta: -32.8 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:28:58,328 INFO L168 Benchmark]: Witness Printer took 9.34 ms. Allocated memory is still 163.6 MB. Free memory is still 105.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:28:58,336 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory was 83.9 MB in the beginning and 83.9 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.43 ms. Allocated memory is still 113.2 MB. Free memory was 76.9 MB in the beginning and 87.3 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.88 ms. Allocated memory is still 113.2 MB. Free memory was 87.3 MB in the beginning and 85.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.83 ms. Allocated memory is still 113.2 MB. Free memory was 85.7 MB in the beginning and 84.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 381.14 ms. Allocated memory is still 113.2 MB. Free memory was 84.1 MB in the beginning and 73.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15487.45 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 72.6 MB in the beginning and 105.3 MB in the end (delta: -32.8 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. * Witness Printer took 9.34 ms. Allocated memory is still 163.6 MB. Free memory is still 105.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 33]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L37] signed long long ARR_SIZE ; [L41] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L31] COND FALSE !(!cond) [L44] int array1[ARR_SIZE] ; [L45] int array2[ARR_SIZE] ; [L46] int count = 0, num = -1 ; [L47] signed long long sum = 0 ; [L48] int temp ; [L49] short index ; [L51] count=0 [L51] COND TRUE count main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY 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 -> 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 [2021-11-07 07:29:01,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:29:01,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:29:01,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:29:01,742 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:29:01,743 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:29:01,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-patterns/array8_pattern.c [2021-11-07 07:29:01,834 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/data/90eb2a083/cd90f5fea22244a2b7ff37cc5920e161/FLAGd56556451 [2021-11-07 07:29:02,419 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:29:02,420 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/sv-benchmarks/c/array-patterns/array8_pattern.c [2021-11-07 07:29:02,428 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/data/90eb2a083/cd90f5fea22244a2b7ff37cc5920e161/FLAGd56556451 [2021-11-07 07:29:02,756 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/data/90eb2a083/cd90f5fea22244a2b7ff37cc5920e161 [2021-11-07 07:29:02,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:29:02,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:29:02,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:29:02,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:29:02,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:29:02,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:29:02" (1/1) ... [2021-11-07 07:29:02,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6089f25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:02, skipping insertion in model container [2021-11-07 07:29:02,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:29:02" (1/1) ... [2021-11-07 07:29:02,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:29:02,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:29:02,982 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_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2021-11-07 07:29:03,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:29:03,022 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:29:03,038 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_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2021-11-07 07:29:03,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:29:03,109 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:29:03,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03 WrapperNode [2021-11-07 07:29:03,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:29:03,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:29:03,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:29:03,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:29:03,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03" (1/1) ... [2021-11-07 07:29:03,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03" (1/1) ... [2021-11-07 07:29:03,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:29:03,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:29:03,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:29:03,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:29:03,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03" (1/1) ... [2021-11-07 07:29:03,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03" (1/1) ... [2021-11-07 07:29:03,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03" (1/1) ... [2021-11-07 07:29:03,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03" (1/1) ... [2021-11-07 07:29:03,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03" (1/1) ... [2021-11-07 07:29:03,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03" (1/1) ... [2021-11-07 07:29:03,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03" (1/1) ... [2021-11-07 07:29:03,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:29:03,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:29:03,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:29:03,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:29:03,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03" (1/1) ... [2021-11-07 07:29:03,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:29:03,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:03,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:29:03,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:29:03,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 07:29:03,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:29:03,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 07:29:03,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:29:03,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:29:03,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:29:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 07:29:03,908 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:29:03,909 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 07:29:03,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:29:03 BoogieIcfgContainer [2021-11-07 07:29:03,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:29:03,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:29:03,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:29:03,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:29:03,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:29:02" (1/3) ... [2021-11-07 07:29:03,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34dab692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:29:03, skipping insertion in model container [2021-11-07 07:29:03,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:03" (2/3) ... [2021-11-07 07:29:03,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34dab692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:29:03, skipping insertion in model container [2021-11-07 07:29:03,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:29:03" (3/3) ... [2021-11-07 07:29:03,920 INFO L111 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2021-11-07 07:29:03,927 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:29:03,927 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:29:04,004 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:29:04,012 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 [2021-11-07 07:29:04,013 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:29:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) [2021-11-07 07:29:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:29:04,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:04,038 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:29:04,039 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:04,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:04,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1209864113, now seen corresponding path program 1 times [2021-11-07 07:29:04,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:29:04,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226176150] [2021-11-07 07:29:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:04,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:29:04,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:29:04,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:29:04,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 07:29:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 07:29:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:29:04,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:29:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:29:04,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:29:04,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226176150] [2021-11-07 07:29:04,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226176150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:04,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:04,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 07:29:04,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811621673] [2021-11-07 07:29:04,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:29:04,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:29:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:29:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:29:04,340 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:04,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:04,359 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-11-07 07:29:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:29:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 07:29:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:04,371 INFO L225 Difference]: With dead ends: 45 [2021-11-07 07:29:04,372 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 07:29:04,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:29:04,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 07:29:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-07 07:29:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-07 07:29:04,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-11-07 07:29:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:04,450 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-07 07:29:04,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-07 07:29:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 07:29:04,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:04,467 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:29:04,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:29:04,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:29:04,680 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:04,681 INFO L85 PathProgramCache]: Analyzing trace with hash -53034967, now seen corresponding path program 1 times [2021-11-07 07:29:04,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:29:04,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918180408] [2021-11-07 07:29:04,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:04,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:29:04,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:29:04,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:29:04,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 07:29:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:04,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:29:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:29:05,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:29:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:29:05,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:29:05,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918180408] [2021-11-07 07:29:05,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918180408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:05,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:05,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 07:29:05,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094279228] [2021-11-07 07:29:05,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:29:05,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:29:05,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:29:05,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:29:05,988 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:06,354 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-11-07 07:29:06,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:29:06,355 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 07:29:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:06,356 INFO L225 Difference]: With dead ends: 26 [2021-11-07 07:29:06,357 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 07:29:06,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:29:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 07:29:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-07 07:29:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:06,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-07 07:29:06,374 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2021-11-07 07:29:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:06,375 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-07 07:29:06,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-07 07:29:06,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 07:29:06,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:06,379 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:29:06,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 07:29:06,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:29:06,594 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:06,595 INFO L85 PathProgramCache]: Analyzing trace with hash 626238283, now seen corresponding path program 1 times [2021-11-07 07:29:06,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:29:06,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884496714] [2021-11-07 07:29:06,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:06,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:29:06,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:29:06,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:29:06,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 07:29:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:06,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:29:06,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:29:07,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:29:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:29:07,198 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:29:07,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884496714] [2021-11-07 07:29:07,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884496714] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:07,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:07,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 07:29:07,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597751297] [2021-11-07 07:29:07,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:29:07,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:29:07,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:29:07,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:29:07,202 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:07,619 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-07 07:29:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:29:07,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 07:29:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:07,621 INFO L225 Difference]: With dead ends: 40 [2021-11-07 07:29:07,621 INFO L226 Difference]: Without dead ends: 25 [2021-11-07 07:29:07,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:29:07,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-07 07:29:07,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-07 07:29:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-07 07:29:07,628 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2021-11-07 07:29:07,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:07,628 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-07 07:29:07,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:07,628 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-07 07:29:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 07:29:07,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:07,630 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] [2021-11-07 07:29:07,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:29:07,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:29:07,831 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:07,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:07,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1988729303, now seen corresponding path program 1 times [2021-11-07 07:29:07,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:29:07,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136516336] [2021-11-07 07:29:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:07,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:29:07,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:29:07,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:29:07,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaaa3b4-1354-4d76-b615-4128d4e6d59e/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 07:29:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:29:08,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:08,277 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 11 treesize of output 9 [2021-11-07 07:29:08,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-07 07:29:09,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 07:29:09,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 31 treesize of output 26 [2021-11-07 07:29:10,131 INFO L354 Elim1Store]: treesize reduction 131, result has 10.9 percent of original size [2021-11-07 07:29:10,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 43 [2021-11-07 07:29:10,587 INFO L354 Elim1Store]: treesize reduction 58, result has 15.9 percent of original size [2021-11-07 07:29:10,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 33 [2021-11-07 07:29:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:29:10,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:29:28,796 INFO L354 Elim1Store]: treesize reduction 90, result has 37.1 percent of original size [2021-11-07 07:29:28,797 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 725 treesize of output 485 [2021-11-07 07:29:28,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:29:28,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 485 treesize of output 471 [2021-11-07 07:29:29,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:29:29,313 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 37 treesize of output 41 [2021-11-07 07:29:35,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:29:35,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 660 treesize of output 702