./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:53:48,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:53:48,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:53:48,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:53:48,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:53:48,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:53:48,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:53:48,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:53:48,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:53:48,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:53:48,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:53:48,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:53:48,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:53:48,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:53:48,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:53:48,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:53:48,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:53:48,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:53:48,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:53:48,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:53:48,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:53:48,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:53:48,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:53:48,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:53:48,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:53:48,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:53:48,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:53:48,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:53:48,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:53:48,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:53:48,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:53:48,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:53:48,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:53:48,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:53:48,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:53:48,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:53:48,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:53:48,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:53:48,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:53:48,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:53:48,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:53:48,652 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 12:53:48,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:53:48,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:53:48,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:53:48,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:53:48,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:53:48,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:53:48,715 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:53:48,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:53:48,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:53:48,716 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 12:53:48,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:53:48,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:53:48,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:53:48,718 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 12:53:48,719 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 12:53:48,719 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 12:53:48,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:53:48,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:53:48,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:53:48,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:53:48,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:53:48,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:53:48,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:53:48,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:53:48,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:53:48,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:53:48,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:53:48,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:53:48,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:53:48,726 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_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 [2021-11-23 12:53:49,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:53:49,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:53:49,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:53:49,039 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:53:49,040 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:53:49,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2021-11-23 12:53:49,116 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/data/2f6930c74/1b4d94d4cc5245c79dd3386760070864/FLAG93227eefd [2021-11-23 12:53:49,743 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:53:49,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2021-11-23 12:53:49,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/data/2f6930c74/1b4d94d4cc5245c79dd3386760070864/FLAG93227eefd [2021-11-23 12:53:50,030 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/data/2f6930c74/1b4d94d4cc5245c79dd3386760070864 [2021-11-23 12:53:50,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:53:50,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:53:50,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:53:50,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:53:50,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:53:50,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@737c4362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50, skipping insertion in model container [2021-11-23 12:53:50,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:53:50,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:53:50,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:53:50,444 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:53:50,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:53:50,518 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:53:50,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50 WrapperNode [2021-11-23 12:53:50,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:53:50,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:53:50,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:53:50,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:53:50,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,565 INFO L137 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2021-11-23 12:53:50,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:53:50,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:53:50,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:53:50,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:53:50,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:53:50,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:53:50,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:53:50,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:53:50,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50" (1/1) ... [2021-11-23 12:53:50,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:53:50,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:53:50,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:53:50,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:53:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:53:50,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:53:50,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:53:50,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:53:50,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:53:50,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:53:50,768 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:53:50,770 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:53:50,930 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:53:50,937 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:53:50,937 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 12:53:50,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:53:50 BoogieIcfgContainer [2021-11-23 12:53:50,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:53:50,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:53:50,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:53:50,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:53:50,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:53:50" (1/3) ... [2021-11-23 12:53:50,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3208307e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:53:50, skipping insertion in model container [2021-11-23 12:53:50,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:53:50" (2/3) ... [2021-11-23 12:53:50,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3208307e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:53:50, skipping insertion in model container [2021-11-23 12:53:50,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:53:50" (3/3) ... [2021-11-23 12:53:50,949 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2021-11-23 12:53:50,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:53:50,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-23 12:53:51,006 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:53:51,014 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:53:51,014 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-23 12:53:51,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:51,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:53:51,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:51,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:53:51,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-23 12:53:51,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:51,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939809662] [2021-11-23 12:53:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:51,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:51,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:51,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939809662] [2021-11-23 12:53:51,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939809662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:53:51,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:53:51,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:53:51,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285143812] [2021-11-23 12:53:51,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:53:51,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:53:51,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:51,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:53:51,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:53:51,384 INFO L87 Difference]: Start difference. First operand has 34 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:51,478 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-23 12:53:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:53:51,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:53:51,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:51,491 INFO L225 Difference]: With dead ends: 60 [2021-11-23 12:53:51,491 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 12:53:51,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:53:51,505 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:51,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 91 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:53:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 12:53:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2021-11-23 12:53:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-23 12:53:51,553 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2021-11-23 12:53:51,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:51,553 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-23 12:53:51,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:51,554 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-23 12:53:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:53:51,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:51,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:53:51,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:53:51,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:51,560 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-11-23 12:53:51,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:51,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537548546] [2021-11-23 12:53:51,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:51,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:51,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:51,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537548546] [2021-11-23 12:53:51,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537548546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:53:51,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:53:51,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:53:51,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881264901] [2021-11-23 12:53:51,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:53:51,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:53:51,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:51,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:53:51,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:53:51,650 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:51,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:51,700 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-23 12:53:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:53:51,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:53:51,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:51,701 INFO L225 Difference]: With dead ends: 32 [2021-11-23 12:53:51,702 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 12:53:51,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:53:51,709 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:51,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 24 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:53:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 12:53:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 12:53:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.565217391304348) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-23 12:53:51,715 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-23 12:53:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:51,715 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-23 12:53:51,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-23 12:53:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:53:51,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:51,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:53:51,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:53:51,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:51,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-11-23 12:53:51,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:51,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028008801] [2021-11-23 12:53:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:51,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:51,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:51,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028008801] [2021-11-23 12:53:51,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028008801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:53:51,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:53:51,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:53:51,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274359906] [2021-11-23 12:53:51,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:53:51,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:53:51,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:51,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:53:51,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:53:51,848 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:51,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:51,906 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-11-23 12:53:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:53:51,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:53:51,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:51,908 INFO L225 Difference]: With dead ends: 31 [2021-11-23 12:53:51,908 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 12:53:51,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:53:51,910 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:51,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:53:51,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 12:53:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 12:53:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-23 12:53:51,916 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 6 [2021-11-23 12:53:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:51,916 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-23 12:53:51,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:51,917 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-23 12:53:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:53:51,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:51,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:53:51,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:53:51,918 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:51,919 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-11-23 12:53:51,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:51,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221375310] [2021-11-23 12:53:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:51,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:52,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:52,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221375310] [2021-11-23 12:53:52,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221375310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:53:52,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:53:52,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:53:52,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784431345] [2021-11-23 12:53:52,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:53:52,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:53:52,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:53:52,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:53:52,059 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:52,147 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-11-23 12:53:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:53:52,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:53:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:52,154 INFO L225 Difference]: With dead ends: 55 [2021-11-23 12:53:52,154 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 12:53:52,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:53:52,158 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:52,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 55 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:53:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 12:53:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-11-23 12:53:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-23 12:53:52,163 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2021-11-23 12:53:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:52,164 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-23 12:53:52,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-23 12:53:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 12:53:52,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:52,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:52,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:53:52,165 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:52,166 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2021-11-23 12:53:52,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:52,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453322705] [2021-11-23 12:53:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:52,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:52,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:52,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453322705] [2021-11-23 12:53:52,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453322705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:53:52,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:53:52,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:53:52,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110965859] [2021-11-23 12:53:52,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:53:52,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:53:52,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:53:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:53:52,223 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:52,280 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-11-23 12:53:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:53:52,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-23 12:53:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:52,281 INFO L225 Difference]: With dead ends: 30 [2021-11-23 12:53:52,282 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 12:53:52,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:53:52,286 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:52,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:53:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 12:53:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-23 12:53:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-23 12:53:52,297 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 8 [2021-11-23 12:53:52,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:52,297 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-23 12:53:52,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:52,298 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-23 12:53:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 12:53:52,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:52,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:52,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:53:52,304 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:52,305 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2021-11-23 12:53:52,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:52,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327127530] [2021-11-23 12:53:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:52,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:52,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:52,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327127530] [2021-11-23 12:53:52,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327127530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:53:52,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:53:52,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:53:52,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361822811] [2021-11-23 12:53:52,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:53:52,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:53:52,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:52,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:53:52,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:53:52,390 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:52,467 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-11-23 12:53:52,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:53:52,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-23 12:53:52,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:52,470 INFO L225 Difference]: With dead ends: 42 [2021-11-23 12:53:52,472 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 12:53:52,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:53:52,476 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:52,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:53:52,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 12:53:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2021-11-23 12:53:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.375) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-11-23 12:53:52,494 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 8 [2021-11-23 12:53:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:52,494 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-11-23 12:53:52,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-11-23 12:53:52,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:53:52,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:52,495 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:52,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:53:52,496 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:52,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:52,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-23 12:53:52,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:52,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337195261] [2021-11-23 12:53:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:52,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:52,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:52,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337195261] [2021-11-23 12:53:52,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337195261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:53:52,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257746410] [2021-11-23 12:53:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:52,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:52,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:53:52,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:53:52,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:53:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:52,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 12:53:52,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:53:52,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:53:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:52,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:53:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:53,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257746410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:53:53,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:53:53,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 12:53:53,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056573062] [2021-11-23 12:53:53,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:53:53,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:53:53,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:53,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:53:53,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:53:53,197 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:53,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:53,369 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2021-11-23 12:53:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:53:53,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 12:53:53,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:53,371 INFO L225 Difference]: With dead ends: 87 [2021-11-23 12:53:53,371 INFO L226 Difference]: Without dead ends: 87 [2021-11-23 12:53:53,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:53:53,373 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 149 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:53,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 126 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:53:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-23 12:53:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 34. [2021-11-23 12:53:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-11-23 12:53:53,385 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 10 [2021-11-23 12:53:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:53,385 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-11-23 12:53:53,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:53,386 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-11-23 12:53:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 12:53:53,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:53,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:53,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:53:53,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:53,606 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:53,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:53,607 INFO L85 PathProgramCache]: Analyzing trace with hash -204603407, now seen corresponding path program 1 times [2021-11-23 12:53:53,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:53,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615687698] [2021-11-23 12:53:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:53,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:53,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:53,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615687698] [2021-11-23 12:53:53,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615687698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:53:53,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:53:53,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:53:53,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838475340] [2021-11-23 12:53:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:53:53,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:53:53,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:53,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:53:53,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:53:53,653 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:53,661 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-11-23 12:53:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:53:53,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 12:53:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:53,668 INFO L225 Difference]: With dead ends: 36 [2021-11-23 12:53:53,668 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 12:53:53,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:53:53,669 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:53,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:53:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 12:53:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-23 12:53:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.3125) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-23 12:53:53,676 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 12 [2021-11-23 12:53:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:53,676 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-23 12:53:53,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-23 12:53:53,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 12:53:53,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:53,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:53,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:53:53,678 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash 938762030, now seen corresponding path program 1 times [2021-11-23 12:53:53,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:53,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947655466] [2021-11-23 12:53:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:53,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:53,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947655466] [2021-11-23 12:53:53,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947655466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:53:53,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:53:53,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:53:53,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868791096] [2021-11-23 12:53:53,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:53:53,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:53:53,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:53,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:53:53,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:53:53,838 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:53,960 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-11-23 12:53:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 12:53:53,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 12:53:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:53,962 INFO L225 Difference]: With dead ends: 48 [2021-11-23 12:53:53,962 INFO L226 Difference]: Without dead ends: 48 [2021-11-23 12:53:53,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:53:53,963 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:53,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 109 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:53:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-23 12:53:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-11-23 12:53:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 40 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) [2021-11-23 12:53:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-23 12:53:53,975 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 14 [2021-11-23 12:53:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:53,976 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-23 12:53:53,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-23 12:53:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 12:53:53,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:53,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:53,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 12:53:53,978 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1196927468, now seen corresponding path program 1 times [2021-11-23 12:53:53,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:53,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704025869] [2021-11-23 12:53:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:53,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:54,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:54,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704025869] [2021-11-23 12:53:54,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704025869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:53:54,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:53:54,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 12:53:54,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405907016] [2021-11-23 12:53:54,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:53:54,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:53:54,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:54,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:53:54,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:53:54,168 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:54,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:54,337 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-23 12:53:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:53:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 12:53:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:54,339 INFO L225 Difference]: With dead ends: 57 [2021-11-23 12:53:54,339 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 12:53:54,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-23 12:53:54,340 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:54,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 112 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:53:54,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 12:53:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2021-11-23 12:53:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 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) [2021-11-23 12:53:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-11-23 12:53:54,348 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 14 [2021-11-23 12:53:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:54,348 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-11-23 12:53:54,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-11-23 12:53:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 12:53:54,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:54,349 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:54,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 12:53:54,350 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1506335819, now seen corresponding path program 1 times [2021-11-23 12:53:54,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:54,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630790928] [2021-11-23 12:53:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:54,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:54,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630790928] [2021-11-23 12:53:54,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630790928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:53:54,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:53:54,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:53:54,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664245580] [2021-11-23 12:53:54,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:53:54,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:53:54,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:53:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:53:54,427 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:54,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:54,442 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-23 12:53:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:53:54,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 12:53:54,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:54,444 INFO L225 Difference]: With dead ends: 41 [2021-11-23 12:53:54,444 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 12:53:54,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:53:54,445 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:54,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:53:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 12:53:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-23 12:53:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-23 12:53:54,448 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2021-11-23 12:53:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:54,448 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-23 12:53:54,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-23 12:53:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 12:53:54,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:54,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:54,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:53:54,450 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:54,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash 676448303, now seen corresponding path program 1 times [2021-11-23 12:53:54,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:54,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331870374] [2021-11-23 12:53:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:54,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:54,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:54,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331870374] [2021-11-23 12:53:54,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331870374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:53:54,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68073707] [2021-11-23 12:53:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:54,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:54,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:53:54,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:53:54,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:53:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:54,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 12:53:54,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:53:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:54,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:53:54,914 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 5 treesize of output 3 [2021-11-23 12:53:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:54,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68073707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:53:54,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:53:54,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-23 12:53:54,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24005451] [2021-11-23 12:53:54,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:53:54,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 12:53:54,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 12:53:54,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-23 12:53:54,952 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:55,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:55,119 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-11-23 12:53:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:53:55,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 12:53:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:55,120 INFO L225 Difference]: With dead ends: 37 [2021-11-23 12:53:55,120 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 12:53:55,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-11-23 12:53:55,121 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 162 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:55,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 62 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:53:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 12:53:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-11-23 12:53:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-23 12:53:55,124 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2021-11-23 12:53:55,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:55,125 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-23 12:53:55,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-23 12:53:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 12:53:55,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:55,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:55,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:53:55,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:55,326 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:55,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1434576067, now seen corresponding path program 2 times [2021-11-23 12:53:55,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:55,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746061085] [2021-11-23 12:53:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:55,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:55,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:55,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746061085] [2021-11-23 12:53:55,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746061085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:53:55,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350943149] [2021-11-23 12:53:55,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:53:55,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:55,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:53:55,665 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:53:55,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:53:55,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:53:55,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:53:55,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 12:53:55,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:53:55,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:53:56,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:53:56,348 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 33 treesize of output 33 [2021-11-23 12:53:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:56,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:53:57,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 12:53:57,098 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 34 treesize of output 30 [2021-11-23 12:53:57,107 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 39 treesize of output 35 [2021-11-23 12:53:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:57,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350943149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:53:57,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:53:57,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2021-11-23 12:53:57,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63362567] [2021-11-23 12:53:57,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:53:57,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 12:53:57,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:57,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 12:53:57,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-11-23 12:53:57,156 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:57,774 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-11-23 12:53:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 12:53:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 12:53:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:57,775 INFO L225 Difference]: With dead ends: 54 [2021-11-23 12:53:57,775 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 12:53:57,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 12:53:57,777 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:57,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 154 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-11-23 12:53:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 12:53:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-11-23 12:53:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-23 12:53:57,786 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2021-11-23 12:53:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:57,787 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-23 12:53:57,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-23 12:53:57,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 12:53:57,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:57,790 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:57,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:53:57,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 12:53:57,991 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:57,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:57,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1404730010, now seen corresponding path program 3 times [2021-11-23 12:53:57,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:57,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271097764] [2021-11-23 12:53:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:57,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:58,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:58,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271097764] [2021-11-23 12:53:58,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271097764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:53:58,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018215295] [2021-11-23 12:53:58,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:53:58,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:58,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:53:58,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:53:58,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:53:58,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 12:53:58,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:53:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 12:53:58,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:53:58,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:53:58,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:53:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:58,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:53:58,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:53:58,897 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 26 treesize of output 22 [2021-11-23 12:53:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:59,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018215295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:53:59,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:53:59,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2021-11-23 12:53:59,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96341427] [2021-11-23 12:53:59,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:53:59,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 12:53:59,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:53:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 12:53:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-23 12:53:59,044 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:53:59,397 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-11-23 12:53:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 12:53:59,398 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 12:53:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:53:59,399 INFO L225 Difference]: With dead ends: 59 [2021-11-23 12:53:59,399 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 12:53:59,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 12:53:59,401 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:53:59,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 142 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 195 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-11-23 12:53:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 12:53:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-11-23 12:53:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-23 12:53:59,409 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2021-11-23 12:53:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:53:59,410 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-23 12:53:59,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:53:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-23 12:53:59,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 12:53:59,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:53:59,415 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:53:59,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 12:53:59,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 12:53:59,629 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:53:59,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:53:59,629 INFO L85 PathProgramCache]: Analyzing trace with hash 746707293, now seen corresponding path program 4 times [2021-11-23 12:53:59,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:53:59,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029103169] [2021-11-23 12:53:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:53:59,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:53:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:53:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:53:59,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:53:59,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029103169] [2021-11-23 12:53:59,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029103169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:53:59,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525964344] [2021-11-23 12:53:59,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:53:59,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:53:59,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:53:59,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:53:59,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:53:59,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:53:59,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:53:59,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 12:53:59,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:00,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:00,603 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 15 treesize of output 11 [2021-11-23 12:54:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:00,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525964344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:00,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:00,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2021-11-23 12:54:00,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130627903] [2021-11-23 12:54:00,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:00,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 12:54:00,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:00,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 12:54:00,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-11-23 12:54:00,791 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 29 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:01,101 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-11-23 12:54:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:54:01,102 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-23 12:54:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:01,102 INFO L225 Difference]: With dead ends: 50 [2021-11-23 12:54:01,102 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 12:54:01,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 12:54:01,104 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 129 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:01,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 189 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:54:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 12:54:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-11-23 12:54:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-23 12:54:01,109 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2021-11-23 12:54:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:01,110 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-23 12:54:01,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-23 12:54:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 12:54:01,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:01,111 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:01,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:01,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 12:54:01,333 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:01,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1090509681, now seen corresponding path program 5 times [2021-11-23 12:54:01,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:01,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570664631] [2021-11-23 12:54:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:01,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:01,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:01,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570664631] [2021-11-23 12:54:01,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570664631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:01,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694449973] [2021-11-23 12:54:01,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:54:01,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:01,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:01,608 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:01,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:54:01,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 12:54:01,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 12:54:01,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:01,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:54:02,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:54:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:02,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:02,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:54:02,261 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 26 treesize of output 22 [2021-11-23 12:54:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:02,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694449973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:02,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:02,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2021-11-23 12:54:02,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11262792] [2021-11-23 12:54:02,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:02,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 12:54:02,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:02,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 12:54:02,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-11-23 12:54:02,453 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:02,985 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-11-23 12:54:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 12:54:02,986 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-23 12:54:02,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:02,987 INFO L225 Difference]: With dead ends: 75 [2021-11-23 12:54:02,987 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 12:54:02,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 12:54:02,989 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 117 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:02,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 245 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 368 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2021-11-23 12:54:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 12:54:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-11-23 12:54:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-23 12:54:02,992 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2021-11-23 12:54:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:02,993 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-23 12:54:02,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-23 12:54:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 12:54:02,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:02,994 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:03,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:03,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:03,205 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:03,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1893589620, now seen corresponding path program 6 times [2021-11-23 12:54:03,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:03,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033680936] [2021-11-23 12:54:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:03,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:03,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:03,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033680936] [2021-11-23 12:54:03,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033680936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:03,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966892580] [2021-11-23 12:54:03,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:54:03,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:03,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:03,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:03,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:54:03,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-23 12:54:03,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:03,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 12:54:03,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:03,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:04,184 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 7 treesize of output 5 [2021-11-23 12:54:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:04,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966892580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:04,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:04,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2021-11-23 12:54:04,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250449335] [2021-11-23 12:54:04,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:04,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 12:54:04,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:04,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 12:54:04,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-11-23 12:54:04,256 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:04,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:04,605 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-11-23 12:54:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:54:04,606 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-23 12:54:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:04,607 INFO L225 Difference]: With dead ends: 60 [2021-11-23 12:54:04,607 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 12:54:04,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 12:54:04,609 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 298 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:04,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 164 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:54:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 12:54:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-11-23 12:54:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-11-23 12:54:04,613 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 48 [2021-11-23 12:54:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:04,613 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-11-23 12:54:04,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-11-23 12:54:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 12:54:04,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:04,615 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:04,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:04,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:04,815 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:04,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:04,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1457490104, now seen corresponding path program 7 times [2021-11-23 12:54:04,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:04,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018539217] [2021-11-23 12:54:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:04,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:05,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018539217] [2021-11-23 12:54:05,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018539217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076593087] [2021-11-23 12:54:05,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:54:05,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:05,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:05,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:05,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:54:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:05,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 12:54:05,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:05,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:54:06,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:54:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:06,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:06,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 12:54:06,339 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 32 treesize of output 28 [2021-11-23 12:54:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:06,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076593087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:06,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:06,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 40 [2021-11-23 12:54:06,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121844695] [2021-11-23 12:54:06,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:06,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 12:54:06,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 12:54:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 12:54:06,925 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:07,714 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-11-23 12:54:07,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 12:54:07,714 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 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 54 [2021-11-23 12:54:07,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:07,715 INFO L225 Difference]: With dead ends: 91 [2021-11-23 12:54:07,715 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 12:54:07,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=294, Invalid=2462, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 12:54:07,717 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 133 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:07,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 374 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 581 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2021-11-23 12:54:07,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 12:54:07,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-11-23 12:54:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-11-23 12:54:07,721 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2021-11-23 12:54:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:07,722 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-11-23 12:54:07,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-11-23 12:54:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 12:54:07,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:07,723 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:07,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:07,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 12:54:07,949 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:07,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:07,949 INFO L85 PathProgramCache]: Analyzing trace with hash 454022795, now seen corresponding path program 8 times [2021-11-23 12:54:07,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:07,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213175478] [2021-11-23 12:54:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:07,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:08,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:08,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213175478] [2021-11-23 12:54:08,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213175478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:08,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159320637] [2021-11-23 12:54:08,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:54:08,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:08,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:08,224 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:08,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:54:08,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:54:08,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:08,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 12:54:08,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:08,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:09,127 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 5 treesize of output 3 [2021-11-23 12:54:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:09,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159320637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:09,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:09,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2021-11-23 12:54:09,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85532170] [2021-11-23 12:54:09,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:09,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 12:54:09,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:09,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 12:54:09,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-11-23 12:54:09,200 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:09,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:09,712 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-23 12:54:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 12:54:09,712 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 states have internal predecessors, (121), 0 states have call successors, (0), 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 58 [2021-11-23 12:54:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:09,713 INFO L225 Difference]: With dead ends: 70 [2021-11-23 12:54:09,713 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 12:54:09,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 12:54:09,715 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 357 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:09,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 282 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:54:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 12:54:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-11-23 12:54:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-11-23 12:54:09,724 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 58 [2021-11-23 12:54:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:09,726 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-11-23 12:54:09,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-11-23 12:54:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 12:54:09,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:09,728 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:09,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:09,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:09,941 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1538965023, now seen corresponding path program 9 times [2021-11-23 12:54:09,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:09,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555347733] [2021-11-23 12:54:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:09,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:10,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:10,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555347733] [2021-11-23 12:54:10,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555347733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:10,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361252593] [2021-11-23 12:54:10,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:54:10,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:10,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:10,291 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:10,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:54:10,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 12:54:10,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:10,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 12:54:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:10,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:54:10,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:54:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:10,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:11,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:54:11,055 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 26 treesize of output 22 [2021-11-23 12:54:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:11,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361252593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:11,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:11,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2021-11-23 12:54:11,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989619652] [2021-11-23 12:54:11,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:11,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 12:54:11,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 12:54:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 12:54:11,278 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:11,999 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2021-11-23 12:54:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 12:54:12,000 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 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 64 [2021-11-23 12:54:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:12,001 INFO L225 Difference]: With dead ends: 107 [2021-11-23 12:54:12,001 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 12:54:12,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 12:54:12,003 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 145 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:12,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 414 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 638 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2021-11-23 12:54:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 12:54:12,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-11-23 12:54:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-11-23 12:54:12,007 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2021-11-23 12:54:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:12,007 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-11-23 12:54:12,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-11-23 12:54:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 12:54:12,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:12,009 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:12,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:12,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:12,225 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1159341474, now seen corresponding path program 10 times [2021-11-23 12:54:12,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:12,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496748612] [2021-11-23 12:54:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:12,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:12,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:12,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496748612] [2021-11-23 12:54:12,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496748612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:12,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759570723] [2021-11-23 12:54:12,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:54:12,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:12,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:12,535 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:12,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 12:54:12,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:54:12,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:12,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 12:54:12,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:13,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:13,472 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 5 treesize of output 3 [2021-11-23 12:54:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:13,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759570723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:13,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:13,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2021-11-23 12:54:13,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246735564] [2021-11-23 12:54:13,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:13,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 12:54:13,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 12:54:13,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 12:54:13,562 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 36 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:14,037 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-11-23 12:54:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 12:54:14,047 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-23 12:54:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:14,048 INFO L225 Difference]: With dead ends: 80 [2021-11-23 12:54:14,048 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 12:54:14,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 12:54:14,049 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 266 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:14,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 339 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:54:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 12:54:14,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-11-23 12:54:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-11-23 12:54:14,053 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 68 [2021-11-23 12:54:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:14,053 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-11-23 12:54:14,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.0285714285714285) internal successors, (141), 36 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-11-23 12:54:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 12:54:14,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:14,055 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:14,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:14,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:14,273 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:14,274 INFO L85 PathProgramCache]: Analyzing trace with hash 591208438, now seen corresponding path program 11 times [2021-11-23 12:54:14,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:14,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268851212] [2021-11-23 12:54:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:14,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:14,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:14,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268851212] [2021-11-23 12:54:14,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268851212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:14,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36860048] [2021-11-23 12:54:14,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:54:14,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:14,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:14,722 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:14,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 12:54:14,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-23 12:54:14,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:14,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-23 12:54:14,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:14,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:54:15,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:54:15,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:54:15,884 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 19 treesize of output 19 [2021-11-23 12:54:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:16,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:17,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:54:17,250 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 26 treesize of output 22 [2021-11-23 12:54:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 66 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:17,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36860048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:17,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:17,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 59 [2021-11-23 12:54:17,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986958749] [2021-11-23 12:54:17,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:17,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-23 12:54:17,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:17,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-23 12:54:17,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=3156, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 12:54:17,920 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:21,223 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2021-11-23 12:54:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 12:54:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-23 12:54:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:21,225 INFO L225 Difference]: With dead ends: 135 [2021-11-23 12:54:21,225 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 12:54:21,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1215, Invalid=7715, Unknown=0, NotChecked=0, Total=8930 [2021-11-23 12:54:21,229 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1228 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:21,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1228 Valid, 858 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 12:54:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 12:54:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-11-23 12:54:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-11-23 12:54:21,233 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 74 [2021-11-23 12:54:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:21,233 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-11-23 12:54:21,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 59 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-11-23 12:54:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 12:54:21,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:21,235 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:21,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:21,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 12:54:21,441 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:21,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2011937505, now seen corresponding path program 12 times [2021-11-23 12:54:21,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:21,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092268038] [2021-11-23 12:54:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:21,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 182 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:21,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:21,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092268038] [2021-11-23 12:54:21,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092268038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:21,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30434028] [2021-11-23 12:54:21,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:54:21,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:21,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:21,805 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:21,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 12:54:22,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-23 12:54:22,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:22,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 12:54:22,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:22,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:54:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 225 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:22,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 225 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:23,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30434028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:23,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:23,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 49 [2021-11-23 12:54:23,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370063053] [2021-11-23 12:54:23,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:23,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 12:54:23,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 12:54:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 12:54:23,736 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 49 states, 49 states have (on average 4.408163265306122) internal successors, (216), 49 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:24,167 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2021-11-23 12:54:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 12:54:24,177 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.408163265306122) internal successors, (216), 49 states have internal predecessors, (216), 0 states have call successors, (0), 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 90 [2021-11-23 12:54:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:24,178 INFO L225 Difference]: With dead ends: 149 [2021-11-23 12:54:24,178 INFO L226 Difference]: Without dead ends: 98 [2021-11-23 12:54:24,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=732, Invalid=2690, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 12:54:24,181 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 87 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:24,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 270 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:54:24,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-23 12:54:24,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-11-23 12:54:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-11-23 12:54:24,186 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2021-11-23 12:54:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:24,186 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-11-23 12:54:24,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.408163265306122) internal successors, (216), 49 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:24,187 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-11-23 12:54:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 12:54:24,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:24,188 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:24,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:24,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:24,401 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:24,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1254356132, now seen corresponding path program 13 times [2021-11-23 12:54:24,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:24,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911872148] [2021-11-23 12:54:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:24,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:24,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:24,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911872148] [2021-11-23 12:54:24,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911872148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:24,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42756540] [2021-11-23 12:54:24,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:54:24,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:24,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:24,925 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:24,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 12:54:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:25,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-23 12:54:25,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:25,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:54:27,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:54:27,783 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 33 treesize of output 33 [2021-11-23 12:54:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:28,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:29,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 12:54:29,538 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 34 treesize of output 30 [2021-11-23 12:54:29,542 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 39 treesize of output 35 [2021-11-23 12:54:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:29,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42756540] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:29,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:29,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 64 [2021-11-23 12:54:29,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257522828] [2021-11-23 12:54:29,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:29,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-23 12:54:29,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:29,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-23 12:54:29,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3728, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 12:54:29,666 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:31,486 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2021-11-23 12:54:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 12:54:31,487 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 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 94 [2021-11-23 12:54:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:31,488 INFO L225 Difference]: With dead ends: 166 [2021-11-23 12:54:31,488 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 12:54:31,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=534, Invalid=6108, Unknown=0, NotChecked=0, Total=6642 [2021-11-23 12:54:31,491 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 241 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:31,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1164 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1076 Invalid, 0 Unknown, 223 Unchecked, 0.6s Time] [2021-11-23 12:54:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 12:54:31,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2021-11-23 12:54:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-11-23 12:54:31,495 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 94 [2021-11-23 12:54:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:31,496 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-11-23 12:54:31,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-11-23 12:54:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 12:54:31,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:31,498 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:31,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:31,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:31,709 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1800059013, now seen corresponding path program 14 times [2021-11-23 12:54:31,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:31,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997086814] [2021-11-23 12:54:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:31,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:32,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:32,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997086814] [2021-11-23 12:54:32,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997086814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:32,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377469541] [2021-11-23 12:54:32,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:54:32,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:32,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:32,284 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:32,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 12:54:32,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:54:32,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:32,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-23 12:54:32,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:32,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:54:35,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:54:35,558 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 33 treesize of output 33 [2021-11-23 12:54:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 120 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:35,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:37,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 12:54:37,577 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 34 treesize of output 30 [2021-11-23 12:54:37,580 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 39 treesize of output 35 [2021-11-23 12:54:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 120 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:37,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377469541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:37,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:37,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 69 [2021-11-23 12:54:37,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390731658] [2021-11-23 12:54:37,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:37,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-23 12:54:37,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:37,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-23 12:54:37,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=4346, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 12:54:37,693 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 69 states, 69 states have (on average 3.8840579710144927) internal successors, (268), 69 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:39,616 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2021-11-23 12:54:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 12:54:39,616 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.8840579710144927) internal successors, (268), 69 states have internal predecessors, (268), 0 states have call successors, (0), 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 104 [2021-11-23 12:54:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:39,617 INFO L225 Difference]: With dead ends: 182 [2021-11-23 12:54:39,618 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 12:54:39,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 189 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=600, Invalid=7056, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 12:54:39,621 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 260 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:39,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1362 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1250 Invalid, 0 Unknown, 265 Unchecked, 0.6s Time] [2021-11-23 12:54:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 12:54:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2021-11-23 12:54:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2021-11-23 12:54:39,626 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 104 [2021-11-23 12:54:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:39,627 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2021-11-23 12:54:39,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.8840579710144927) internal successors, (268), 69 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2021-11-23 12:54:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 12:54:39,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:39,629 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:39,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:39,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 12:54:39,845 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:39,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash 896038226, now seen corresponding path program 15 times [2021-11-23 12:54:39,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:39,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938540122] [2021-11-23 12:54:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:39,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:40,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:40,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938540122] [2021-11-23 12:54:40,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938540122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:40,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491262016] [2021-11-23 12:54:40,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:54:40,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:40,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:40,580 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:40,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 12:54:40,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-23 12:54:40,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:40,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-23 12:54:40,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:41,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:54:41,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:54:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:41,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:41,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:54:41,877 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 26 treesize of output 22 [2021-11-23 12:54:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:42,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491262016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:42,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:42,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2021-11-23 12:54:42,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22177834] [2021-11-23 12:54:42,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:42,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 12:54:42,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:42,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 12:54:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 12:54:42,158 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 48 states, 48 states have (on average 3.6875) internal successors, (177), 48 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:43,911 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2021-11-23 12:54:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 12:54:43,912 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6875) internal successors, (177), 48 states have internal predecessors, (177), 0 states have call successors, (0), 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 114 [2021-11-23 12:54:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:43,913 INFO L225 Difference]: With dead ends: 187 [2021-11-23 12:54:43,913 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 12:54:43,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 206 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=393, Invalid=4863, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 12:54:43,914 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 310 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:43,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 1316 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 12:54:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 12:54:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-11-23 12:54:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-11-23 12:54:43,918 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2021-11-23 12:54:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:43,919 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-11-23 12:54:43,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6875) internal successors, (177), 48 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-11-23 12:54:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 12:54:43,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:43,920 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:43,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:44,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 12:54:44,149 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:44,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1915770389, now seen corresponding path program 16 times [2021-11-23 12:54:44,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:44,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637394517] [2021-11-23 12:54:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:44,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 153 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:44,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:44,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637394517] [2021-11-23 12:54:44,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637394517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:44,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467911821] [2021-11-23 12:54:44,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:54:44,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:44,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:44,855 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:44,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 12:54:45,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:54:45,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 12:54:45,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 190 proven. 382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:45,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:46,692 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 5 treesize of output 3 [2021-11-23 12:54:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 190 proven. 382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:46,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467911821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:46,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:46,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 55 [2021-11-23 12:54:46,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326335113] [2021-11-23 12:54:46,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:46,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 12:54:46,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:46,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 12:54:46,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2700, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 12:54:46,811 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 56 states, 55 states have (on average 4.381818181818182) internal successors, (241), 56 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:47,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:47,731 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-11-23 12:54:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 12:54:47,732 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 4.381818181818182) internal successors, (241), 56 states have internal predecessors, (241), 0 states have call successors, (0), 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 118 [2021-11-23 12:54:47,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:47,733 INFO L225 Difference]: With dead ends: 130 [2021-11-23 12:54:47,733 INFO L226 Difference]: Without dead ends: 130 [2021-11-23 12:54:47,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=891, Invalid=3939, Unknown=0, NotChecked=0, Total=4830 [2021-11-23 12:54:47,734 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 637 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:47,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 761 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 12:54:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-23 12:54:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2021-11-23 12:54:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-11-23 12:54:47,739 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 118 [2021-11-23 12:54:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:47,739 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-11-23 12:54:47,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 4.381818181818182) internal successors, (241), 56 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-11-23 12:54:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 12:54:47,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:47,741 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:47,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:47,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 12:54:47,969 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:47,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1772360151, now seen corresponding path program 17 times [2021-11-23 12:54:47,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:47,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103249997] [2021-11-23 12:54:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:47,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:48,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:48,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103249997] [2021-11-23 12:54:48,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103249997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:48,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964743553] [2021-11-23 12:54:48,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:54:48,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:48,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:48,793 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:48,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 12:54:49,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-23 12:54:49,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-23 12:54:49,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:49,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:54:49,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:54:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:49,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:50,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:54:50,165 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 26 treesize of output 22 [2021-11-23 12:54:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:50,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964743553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:50,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:50,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2021-11-23 12:54:50,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144516281] [2021-11-23 12:54:50,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:50,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 12:54:50,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:50,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 12:54:50,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 12:54:50,471 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:52,681 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2021-11-23 12:54:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 12:54:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-23 12:54:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:52,685 INFO L225 Difference]: With dead ends: 203 [2021-11-23 12:54:52,686 INFO L226 Difference]: Without dead ends: 132 [2021-11-23 12:54:52,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 225 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=419, Invalid=5587, Unknown=0, NotChecked=0, Total=6006 [2021-11-23 12:54:52,688 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 269 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:52,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 1589 Invalid, 2671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2492 Invalid, 0 Unknown, 122 Unchecked, 1.1s Time] [2021-11-23 12:54:52,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-23 12:54:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-11-23 12:54:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-11-23 12:54:52,693 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2021-11-23 12:54:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:52,694 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-11-23 12:54:52,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-11-23 12:54:52,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 12:54:52,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:52,695 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:52,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:52,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 12:54:52,919 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1291843372, now seen corresponding path program 18 times [2021-11-23 12:54:52,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:52,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283978922] [2021-11-23 12:54:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:52,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:53,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:53,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283978922] [2021-11-23 12:54:53,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283978922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:53,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790258678] [2021-11-23 12:54:53,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:54:53,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:53,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:53,643 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:53,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 12:54:54,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-23 12:54:54,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:54:54,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-23 12:54:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:54,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:54:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:55,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 276 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:57,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790258678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:54:57,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:54:57,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2021-11-23 12:54:57,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084519166] [2021-11-23 12:54:57,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:54:57,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-23 12:54:57,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:54:57,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-23 12:54:57,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=5836, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 12:54:57,310 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 83 states, 82 states have (on average 4.609756097560975) internal successors, (378), 83 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:58,628 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-11-23 12:54:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 12:54:58,629 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 4.609756097560975) internal successors, (378), 83 states have internal predecessors, (378), 0 states have call successors, (0), 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 128 [2021-11-23 12:54:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:58,633 INFO L225 Difference]: With dead ends: 140 [2021-11-23 12:54:58,633 INFO L226 Difference]: Without dead ends: 140 [2021-11-23 12:54:58,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2817 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1831, Invalid=7675, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 12:54:58,642 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 450 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:58,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 792 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 12:54:58,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-23 12:54:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-11-23 12:54:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-11-23 12:54:58,650 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 128 [2021-11-23 12:54:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:58,650 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-11-23 12:54:58,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 4.609756097560975) internal successors, (378), 83 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-11-23 12:54:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 12:54:58,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:58,652 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:58,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:58,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 12:54:58,861 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:54:58,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:58,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1709056512, now seen corresponding path program 19 times [2021-11-23 12:54:58,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:54:58,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832987105] [2021-11-23 12:54:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:58,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:54:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:59,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:54:59,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832987105] [2021-11-23 12:54:59,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832987105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:54:59,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379948383] [2021-11-23 12:54:59,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:54:59,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:54:59,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:59,840 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:54:59,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 12:54:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-23 12:54:59,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:00,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:55:01,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:55:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:01,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:01,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:55:01,442 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 26 treesize of output 22 [2021-11-23 12:55:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:01,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379948383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:01,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:01,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2021-11-23 12:55:01,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632273959] [2021-11-23 12:55:01,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:01,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-23 12:55:01,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:01,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-23 12:55:01,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2720, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 12:55:01,768 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 54 states, 54 states have (on average 3.7962962962962963) internal successors, (205), 54 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:04,324 INFO L93 Difference]: Finished difference Result 219 states and 220 transitions. [2021-11-23 12:55:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 12:55:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7962962962962963) internal successors, (205), 54 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-23 12:55:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:04,326 INFO L225 Difference]: With dead ends: 219 [2021-11-23 12:55:04,326 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 12:55:04,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=445, Invalid=6361, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 12:55:04,327 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 291 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 3105 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:04,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 1962 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3105 Invalid, 0 Unknown, 68 Unchecked, 1.4s Time] [2021-11-23 12:55:04,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 12:55:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2021-11-23 12:55:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2021-11-23 12:55:04,332 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2021-11-23 12:55:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:04,333 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2021-11-23 12:55:04,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7962962962962963) internal successors, (205), 54 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2021-11-23 12:55:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 12:55:04,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:04,334 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:04,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:04,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:04,549 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:55:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:04,549 INFO L85 PathProgramCache]: Analyzing trace with hash -394722493, now seen corresponding path program 20 times [2021-11-23 12:55:04,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:04,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618051573] [2021-11-23 12:55:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:04,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 231 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:05,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:05,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618051573] [2021-11-23 12:55:05,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618051573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:05,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139276923] [2021-11-23 12:55:05,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:55:05,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:05,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:05,345 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:05,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 12:55:05,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:55:05,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:05,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-23 12:55:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 276 proven. 530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:06,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:07,297 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 5 treesize of output 3 [2021-11-23 12:55:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 276 proven. 530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:07,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139276923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:07,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:07,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 63 [2021-11-23 12:55:07,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090326147] [2021-11-23 12:55:07,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:07,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-23 12:55:07,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:07,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-23 12:55:07,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=3538, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 12:55:07,421 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 64 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 64 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:08,580 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2021-11-23 12:55:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 12:55:08,580 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 64 states have internal predecessors, (281), 0 states have call successors, (0), 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 138 [2021-11-23 12:55:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:08,581 INFO L225 Difference]: With dead ends: 150 [2021-11-23 12:55:08,581 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 12:55:08,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1158, Invalid=5162, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 12:55:08,583 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 640 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:08,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 1096 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 12:55:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 12:55:08,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2021-11-23 12:55:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-11-23 12:55:08,588 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 138 [2021-11-23 12:55:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:08,589 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-11-23 12:55:08,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.4603174603174605) internal successors, (281), 64 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-11-23 12:55:08,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 12:55:08,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:08,591 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:08,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-23 12:55:08,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-23 12:55:08,805 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:55:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:08,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1309507799, now seen corresponding path program 21 times [2021-11-23 12:55:08,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:08,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274916863] [2021-11-23 12:55:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:08,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:09,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:09,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274916863] [2021-11-23 12:55:09,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274916863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:09,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096869908] [2021-11-23 12:55:09,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:55:09,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:09,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:09,679 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:09,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 12:55:10,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-23 12:55:10,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:10,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 12:55:10,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:10,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:55:11,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:55:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:11,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:11,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:55:11,518 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 26 treesize of output 22 [2021-11-23 12:55:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:11,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096869908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:11,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:11,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2021-11-23 12:55:11,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881154712] [2021-11-23 12:55:11,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:11,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-23 12:55:11,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:11,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-23 12:55:11,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 12:55:11,813 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:14,554 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2021-11-23 12:55:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 12:55:14,555 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 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 144 [2021-11-23 12:55:14,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:14,556 INFO L225 Difference]: With dead ends: 235 [2021-11-23 12:55:14,556 INFO L226 Difference]: Without dead ends: 152 [2021-11-23 12:55:14,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 263 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=471, Invalid=7185, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 12:55:14,557 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 388 mSDsluCounter, 2248 mSDsCounter, 0 mSdLazyCounter, 3616 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 3779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:14,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 2305 Invalid, 3779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3616 Invalid, 0 Unknown, 82 Unchecked, 1.5s Time] [2021-11-23 12:55:14,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-23 12:55:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2021-11-23 12:55:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-11-23 12:55:14,563 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2021-11-23 12:55:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:14,564 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-11-23 12:55:14,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-11-23 12:55:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-23 12:55:14,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:14,566 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:14,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:14,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:14,773 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:55:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:14,773 INFO L85 PathProgramCache]: Analyzing trace with hash -786568614, now seen corresponding path program 22 times [2021-11-23 12:55:14,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:14,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576358926] [2021-11-23 12:55:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:14,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 276 proven. 662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:15,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:15,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576358926] [2021-11-23 12:55:15,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576358926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:15,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4764209] [2021-11-23 12:55:15,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:55:15,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:15,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:15,532 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:15,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 12:55:15,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:55:15,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:15,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-23 12:55:15,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:16,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:17,677 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 5 treesize of output 3 [2021-11-23 12:55:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:17,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4764209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:17,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:17,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 67 [2021-11-23 12:55:17,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382520441] [2021-11-23 12:55:17,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:17,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-23 12:55:17,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:17,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-23 12:55:17,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=3999, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 12:55:17,827 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 68 states, 67 states have (on average 4.492537313432836) internal successors, (301), 68 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:19,396 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2021-11-23 12:55:19,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 12:55:19,397 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.492537313432836) internal successors, (301), 68 states have internal predecessors, (301), 0 states have call successors, (0), 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 148 [2021-11-23 12:55:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:19,401 INFO L225 Difference]: With dead ends: 160 [2021-11-23 12:55:19,402 INFO L226 Difference]: Without dead ends: 160 [2021-11-23 12:55:19,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1305, Invalid=5835, Unknown=0, NotChecked=0, Total=7140 [2021-11-23 12:55:19,403 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 679 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 2283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:19,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 1305 Invalid, 2283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 12:55:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-23 12:55:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2021-11-23 12:55:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-11-23 12:55:19,408 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 148 [2021-11-23 12:55:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:19,409 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-11-23 12:55:19,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.492537313432836) internal successors, (301), 68 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:19,410 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-11-23 12:55:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 12:55:19,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:19,411 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:19,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:19,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:19,627 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:55:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1411876178, now seen corresponding path program 23 times [2021-11-23 12:55:19,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:19,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676596149] [2021-11-23 12:55:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:19,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:20,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:20,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676596149] [2021-11-23 12:55:20,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676596149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:20,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152744149] [2021-11-23 12:55:20,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:55:20,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:20,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:20,636 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:20,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 12:55:20,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-23 12:55:20,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:20,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-23 12:55:20,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:21,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:55:22,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:55:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:22,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:22,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:55:22,324 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 26 treesize of output 22 [2021-11-23 12:55:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:22,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152744149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:22,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:22,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 60 [2021-11-23 12:55:22,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070997971] [2021-11-23 12:55:22,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:22,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 12:55:22,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 12:55:22,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3384, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 12:55:22,663 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 60 states, 60 states have (on average 3.8833333333333333) internal successors, (233), 60 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:25,390 INFO L93 Difference]: Finished difference Result 251 states and 252 transitions. [2021-11-23 12:55:25,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-23 12:55:25,390 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.8833333333333333) internal successors, (233), 60 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-23 12:55:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:25,391 INFO L225 Difference]: With dead ends: 251 [2021-11-23 12:55:25,391 INFO L226 Difference]: Without dead ends: 162 [2021-11-23 12:55:25,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 282 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=497, Invalid=8059, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 12:55:25,393 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 414 mSDsluCounter, 2331 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 3909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:25,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 2392 Invalid, 3909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3735 Invalid, 0 Unknown, 87 Unchecked, 1.5s Time] [2021-11-23 12:55:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-23 12:55:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2021-11-23 12:55:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-11-23 12:55:25,398 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2021-11-23 12:55:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:25,398 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-11-23 12:55:25,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.8833333333333333) internal successors, (233), 60 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-11-23 12:55:25,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-23 12:55:25,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:25,399 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:25,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:25,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-23 12:55:25,599 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:55:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:25,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1723786127, now seen corresponding path program 24 times [2021-11-23 12:55:25,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:25,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790733323] [2021-11-23 12:55:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:25,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 325 proven. 755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:26,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790733323] [2021-11-23 12:55:26,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790733323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920217693] [2021-11-23 12:55:26,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:55:26,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:26,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:26,336 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:26,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 12:55:26,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-23 12:55:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:26,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-23 12:55:26,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:28,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:29,410 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 7 treesize of output 5 [2021-11-23 12:55:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:29,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920217693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:29,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:29,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 86 [2021-11-23 12:55:29,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757869491] [2021-11-23 12:55:29,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:29,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-23 12:55:29,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:29,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-23 12:55:29,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=6350, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 12:55:29,539 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 87 states, 86 states have (on average 4.72093023255814) internal successors, (406), 87 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:30,655 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions. [2021-11-23 12:55:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 12:55:30,656 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 4.72093023255814) internal successors, (406), 87 states have internal predecessors, (406), 0 states have call successors, (0), 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 158 [2021-11-23 12:55:30,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:30,657 INFO L225 Difference]: With dead ends: 170 [2021-11-23 12:55:30,657 INFO L226 Difference]: Without dead ends: 170 [2021-11-23 12:55:30,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2131, Invalid=8789, Unknown=0, NotChecked=0, Total=10920 [2021-11-23 12:55:30,658 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 960 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:30,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 907 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 12:55:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-23 12:55:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-11-23 12:55:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-11-23 12:55:30,663 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 158 [2021-11-23 12:55:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:30,664 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-11-23 12:55:30,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 4.72093023255814) internal successors, (406), 87 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-11-23 12:55:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 12:55:30,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:30,666 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:30,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:30,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-23 12:55:30,893 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:55:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:30,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1174241157, now seen corresponding path program 25 times [2021-11-23 12:55:30,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:30,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590668504] [2021-11-23 12:55:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:30,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:32,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:32,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590668504] [2021-11-23 12:55:32,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590668504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:32,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772261339] [2021-11-23 12:55:32,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:55:32,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:32,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:32,050 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:32,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 12:55:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-23 12:55:32,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:33,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:55:33,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:55:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:33,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:33,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:55:33,705 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 26 treesize of output 22 [2021-11-23 12:55:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:34,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772261339] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:34,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:34,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 63 [2021-11-23 12:55:34,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120166595] [2021-11-23 12:55:34,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:34,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-23 12:55:34,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-23 12:55:34,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3743, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 12:55:34,032 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:37,356 INFO L93 Difference]: Finished difference Result 267 states and 268 transitions. [2021-11-23 12:55:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-23 12:55:37,357 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 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 164 [2021-11-23 12:55:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:37,358 INFO L225 Difference]: With dead ends: 267 [2021-11-23 12:55:37,359 INFO L226 Difference]: Without dead ends: 172 [2021-11-23 12:55:37,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 301 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=523, Invalid=8983, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 12:55:37,360 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 602 mSDsluCounter, 2587 mSDsCounter, 0 mSdLazyCounter, 4220 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 2652 SdHoareTripleChecker+Invalid, 4343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:37,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 2652 Invalid, 4343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4220 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 12:55:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-23 12:55:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2021-11-23 12:55:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2021-11-23 12:55:37,365 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2021-11-23 12:55:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:37,365 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2021-11-23 12:55:37,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2021-11-23 12:55:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-23 12:55:37,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:37,367 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:37,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:37,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-23 12:55:37,593 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:55:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash -804976248, now seen corresponding path program 26 times [2021-11-23 12:55:37,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:37,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403313749] [2021-11-23 12:55:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:37,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 378 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:38,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:38,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403313749] [2021-11-23 12:55:38,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403313749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:38,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930296772] [2021-11-23 12:55:38,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:55:38,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:38,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:38,355 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:38,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 12:55:38,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:55:38,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:38,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-23 12:55:38,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:39,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:41,016 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 5 treesize of output 3 [2021-11-23 12:55:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:41,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930296772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:41,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:41,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 75 [2021-11-23 12:55:41,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698981095] [2021-11-23 12:55:41,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:41,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-23 12:55:41,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:41,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-23 12:55:41,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=5005, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 12:55:41,173 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:42,729 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2021-11-23 12:55:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 12:55:42,729 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 0 states have call successors, (0), 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 168 [2021-11-23 12:55:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:42,731 INFO L225 Difference]: With dead ends: 180 [2021-11-23 12:55:42,731 INFO L226 Difference]: Without dead ends: 180 [2021-11-23 12:55:42,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2342 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2021-11-23 12:55:42,733 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 849 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:42,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 1648 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 12:55:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-23 12:55:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2021-11-23 12:55:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2021-11-23 12:55:42,739 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 168 [2021-11-23 12:55:42,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:42,739 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2021-11-23 12:55:42,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2021-11-23 12:55:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-23 12:55:42,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:42,741 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:42,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:42,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-23 12:55:42,953 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:55:42,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:42,953 INFO L85 PathProgramCache]: Analyzing trace with hash 67829596, now seen corresponding path program 27 times [2021-11-23 12:55:42,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:42,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292117655] [2021-11-23 12:55:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:42,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:44,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:44,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292117655] [2021-11-23 12:55:44,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292117655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:44,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694712128] [2021-11-23 12:55:44,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:55:44,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:44,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:44,117 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:44,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 12:55:44,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-23 12:55:44,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:44,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-23 12:55:44,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:45,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:55:46,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:55:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:46,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:46,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:55:46,493 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 26 treesize of output 22 [2021-11-23 12:55:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:46,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694712128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:46,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:46,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 66 [2021-11-23 12:55:46,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266174518] [2021-11-23 12:55:46,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:46,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-23 12:55:46,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:46,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-23 12:55:46,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4120, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 12:55:46,863 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 66 states, 66 states have (on average 3.9545454545454546) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:50,348 INFO L93 Difference]: Finished difference Result 283 states and 284 transitions. [2021-11-23 12:55:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-23 12:55:50,348 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.9545454545454546) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 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 174 [2021-11-23 12:55:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:50,350 INFO L225 Difference]: With dead ends: 283 [2021-11-23 12:55:50,350 INFO L226 Difference]: Without dead ends: 182 [2021-11-23 12:55:50,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=477, Invalid=10029, Unknown=0, NotChecked=0, Total=10506 [2021-11-23 12:55:50,352 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 392 mSDsluCounter, 3167 mSDsCounter, 0 mSdLazyCounter, 5034 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 3236 SdHoareTripleChecker+Invalid, 5190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 5034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:50,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 3236 Invalid, 5190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 5034 Invalid, 0 Unknown, 74 Unchecked, 2.0s Time] [2021-11-23 12:55:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-23 12:55:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2021-11-23 12:55:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2021-11-23 12:55:50,357 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2021-11-23 12:55:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:50,357 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2021-11-23 12:55:50,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.9545454545454546) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2021-11-23 12:55:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 12:55:50,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:50,359 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:50,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:50,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:50,569 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:55:50,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:50,569 INFO L85 PathProgramCache]: Analyzing trace with hash -128179809, now seen corresponding path program 28 times [2021-11-23 12:55:50,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:50,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853300697] [2021-11-23 12:55:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:50,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 435 proven. 959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:51,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:51,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853300697] [2021-11-23 12:55:51,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853300697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:51,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977568915] [2021-11-23 12:55:51,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:55:51,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:51,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:51,548 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:51,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 12:55:51,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:55:51,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:51,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-23 12:55:51,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 496 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:53,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:54,592 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 21 treesize of output 17 [2021-11-23 12:55:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 496 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:55,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977568915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:55,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:55,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 95 [2021-11-23 12:55:55,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832723101] [2021-11-23 12:55:55,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:55,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-23 12:55:55,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:55,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-23 12:55:55,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1239, Invalid=7881, Unknown=0, NotChecked=0, Total=9120 [2021-11-23 12:55:55,882 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 96 states, 95 states have (on average 4.536842105263158) internal successors, (431), 96 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:57,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:57,671 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2021-11-23 12:55:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 12:55:57,672 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.536842105263158) internal successors, (431), 96 states have internal predecessors, (431), 0 states have call successors, (0), 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 178 [2021-11-23 12:55:57,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:57,673 INFO L225 Difference]: With dead ends: 190 [2021-11-23 12:55:57,673 INFO L226 Difference]: Without dead ends: 190 [2021-11-23 12:55:57,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3764 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2627, Invalid=10713, Unknown=0, NotChecked=0, Total=13340 [2021-11-23 12:55:57,674 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1090 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 2674 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:57,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 1647 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2674 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 12:55:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-23 12:55:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2021-11-23 12:55:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-11-23 12:55:57,679 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 178 [2021-11-23 12:55:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:57,680 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-11-23 12:55:57,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.536842105263158) internal successors, (431), 96 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:57,680 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-11-23 12:55:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-23 12:55:57,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:57,682 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:57,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:57,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-23 12:55:57,897 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:55:57,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:57,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1520473549, now seen corresponding path program 29 times [2021-11-23 12:55:57,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:57,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056494718] [2021-11-23 12:55:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:57,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:59,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:59,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056494718] [2021-11-23 12:55:59,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056494718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:59,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284834720] [2021-11-23 12:55:59,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:55:59,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:59,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:59,337 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:59,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 12:55:59,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-23 12:55:59,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:59,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-23 12:55:59,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:59,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:56:01,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:56:03,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:56:03,263 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 19 treesize of output 19 [2021-11-23 12:56:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 496 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:03,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:06,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:56:06,201 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 26 treesize of output 22 [2021-11-23 12:56:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 561 proven. 936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:08,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284834720] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:56:08,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:56:08,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 125 [2021-11-23 12:56:08,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631976147] [2021-11-23 12:56:08,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:56:08,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-23 12:56:08,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:56:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-23 12:56:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=14497, Unknown=0, NotChecked=0, Total=15500 [2021-11-23 12:56:08,669 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 125 states, 125 states have (on average 4.368) internal successors, (546), 125 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:16,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:16,615 INFO L93 Difference]: Finished difference Result 311 states and 312 transitions. [2021-11-23 12:56:16,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-23 12:56:16,621 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 4.368) internal successors, (546), 125 states have internal predecessors, (546), 0 states have call successors, (0), 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 184 [2021-11-23 12:56:16,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:16,622 INFO L225 Difference]: With dead ends: 311 [2021-11-23 12:56:16,622 INFO L226 Difference]: Without dead ends: 204 [2021-11-23 12:56:16,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4404 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=4339, Invalid=33103, Unknown=0, NotChecked=0, Total=37442 [2021-11-23 12:56:16,624 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 2642 mSDsluCounter, 4123 mSDsCounter, 0 mSdLazyCounter, 7130 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2642 SdHoareTripleChecker+Valid, 4197 SdHoareTripleChecker+Invalid, 7642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 7130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:16,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2642 Valid, 4197 Invalid, 7642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 7130 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 12:56:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-23 12:56:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2021-11-23 12:56:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2021-11-23 12:56:16,629 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 184 [2021-11-23 12:56:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:16,630 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2021-11-23 12:56:16,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 4.368) internal successors, (546), 125 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2021-11-23 12:56:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-23 12:56:16,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:16,631 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:16,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:16,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-23 12:56:16,832 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:56:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:16,832 INFO L85 PathProgramCache]: Analyzing trace with hash 182762590, now seen corresponding path program 30 times [2021-11-23 12:56:16,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:56:16,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031718155] [2021-11-23 12:56:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:16,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:56:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 1051 proven. 739 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:17,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:56:17,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031718155] [2021-11-23 12:56:17,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031718155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:56:17,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850776018] [2021-11-23 12:56:17,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:56:17,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:17,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:56:17,730 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:56:17,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 12:56:19,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-23 12:56:19,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:56:19,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-23 12:56:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:19,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:56:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 1160 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:21,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 1160 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:23,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850776018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:56:23,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:56:23,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 104 [2021-11-23 12:56:23,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961742460] [2021-11-23 12:56:23,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:56:23,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-23 12:56:23,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:56:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-23 12:56:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1962, Invalid=8750, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 12:56:23,206 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 104 states, 104 states have (on average 4.615384615384615) internal successors, (480), 104 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:24,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:24,320 INFO L93 Difference]: Finished difference Result 325 states and 326 transitions. [2021-11-23 12:56:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 12:56:24,321 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.615384615384615) internal successors, (480), 104 states have internal predecessors, (480), 0 states have call successors, (0), 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 200 [2021-11-23 12:56:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:24,322 INFO L225 Difference]: With dead ends: 325 [2021-11-23 12:56:24,323 INFO L226 Difference]: Without dead ends: 208 [2021-11-23 12:56:24,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3838 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3141, Invalid=12359, Unknown=0, NotChecked=0, Total=15500 [2021-11-23 12:56:24,325 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 178 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:24,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 734 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:56:24,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-23 12:56:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2021-11-23 12:56:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-11-23 12:56:24,330 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 200 [2021-11-23 12:56:24,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:24,330 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-11-23 12:56:24,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.615384615384615) internal successors, (480), 104 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-11-23 12:56:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-23 12:56:24,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:24,332 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:24,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:24,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-23 12:56:24,547 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:56:24,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:24,548 INFO L85 PathProgramCache]: Analyzing trace with hash 275169505, now seen corresponding path program 31 times [2021-11-23 12:56:24,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:56:24,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125426105] [2021-11-23 12:56:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:24,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:56:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:25,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:56:25,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125426105] [2021-11-23 12:56:25,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125426105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:56:25,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148680948] [2021-11-23 12:56:25,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:56:25,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:25,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:56:25,915 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:56:25,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 12:56:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:26,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-23 12:56:26,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:27,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:56:27,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:56:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:27,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:27,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:56:27,854 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 26 treesize of output 22 [2021-11-23 12:56:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:28,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148680948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:56:28,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:56:28,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 75 [2021-11-23 12:56:28,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272369423] [2021-11-23 12:56:28,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:56:28,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-23 12:56:28,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:56:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-23 12:56:28,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=5359, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 12:56:28,195 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 75 states, 75 states have (on average 4.04) internal successors, (303), 75 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:32,534 INFO L93 Difference]: Finished difference Result 331 states and 332 transitions. [2021-11-23 12:56:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-23 12:56:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.04) internal successors, (303), 75 states have internal predecessors, (303), 0 states have call successors, (0), 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 204 [2021-11-23 12:56:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:32,536 INFO L225 Difference]: With dead ends: 331 [2021-11-23 12:56:32,536 INFO L226 Difference]: Without dead ends: 212 [2021-11-23 12:56:32,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 377 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=627, Invalid=13179, Unknown=0, NotChecked=0, Total=13806 [2021-11-23 12:56:32,537 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 557 mSDsluCounter, 4238 mSDsCounter, 0 mSdLazyCounter, 6744 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 4319 SdHoareTripleChecker+Invalid, 6970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 6744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:32,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 4319 Invalid, 6970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 6744 Invalid, 0 Unknown, 108 Unchecked, 2.4s Time] [2021-11-23 12:56:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-23 12:56:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2021-11-23 12:56:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2021-11-23 12:56:32,542 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 204 [2021-11-23 12:56:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:32,543 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2021-11-23 12:56:32,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.04) internal successors, (303), 75 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2021-11-23 12:56:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-23 12:56:32,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:32,545 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:32,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:32,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:32,757 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:56:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:32,757 INFO L85 PathProgramCache]: Analyzing trace with hash -998454300, now seen corresponding path program 32 times [2021-11-23 12:56:32,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:56:32,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188726149] [2021-11-23 12:56:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:32,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:56:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 630 proven. 1310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:33,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:56:33,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188726149] [2021-11-23 12:56:33,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188726149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:56:33,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146432564] [2021-11-23 12:56:33,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:56:33,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:33,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:56:33,860 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:56:33,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 12:56:33,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:56:33,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:56:33,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-23 12:56:33,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:35,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:36,945 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 5 treesize of output 3 [2021-11-23 12:56:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:37,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146432564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:56:37,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:56:37,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 91 [2021-11-23 12:56:37,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825373688] [2021-11-23 12:56:37,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:56:37,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-23 12:56:37,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:56:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-23 12:56:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=7353, Unknown=0, NotChecked=0, Total=8372 [2021-11-23 12:56:37,143 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:39,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:39,461 INFO L93 Difference]: Finished difference Result 220 states and 221 transitions. [2021-11-23 12:56:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 12:56:39,461 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 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 208 [2021-11-23 12:56:39,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:39,462 INFO L225 Difference]: With dead ends: 220 [2021-11-23 12:56:39,462 INFO L226 Difference]: Without dead ends: 220 [2021-11-23 12:56:39,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 366 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2376, Invalid=10734, Unknown=0, NotChecked=0, Total=13110 [2021-11-23 12:56:39,464 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 814 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 3621 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 3621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:39,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 2248 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 3621 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 12:56:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-23 12:56:39,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 215. [2021-11-23 12:56:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2021-11-23 12:56:39,469 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 208 [2021-11-23 12:56:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:39,470 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2021-11-23 12:56:39,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2021-11-23 12:56:39,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-23 12:56:39,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:39,472 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:39,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:39,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-23 12:56:39,685 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:56:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:39,685 INFO L85 PathProgramCache]: Analyzing trace with hash -18445128, now seen corresponding path program 33 times [2021-11-23 12:56:39,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:56:39,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449148512] [2021-11-23 12:56:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:39,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:56:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:41,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:56:41,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449148512] [2021-11-23 12:56:41,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449148512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:56:41,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969236161] [2021-11-23 12:56:41,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:56:41,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:41,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:56:41,461 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:56:41,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 12:56:42,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-23 12:56:42,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:56:42,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-23 12:56:42,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:43,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:56:44,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:56:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:44,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:44,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:56:44,870 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 26 treesize of output 22 [2021-11-23 12:56:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:45,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969236161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:56:45,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:56:45,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 78 [2021-11-23 12:56:45,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904930104] [2021-11-23 12:56:45,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:56:45,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-23 12:56:45,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:56:45,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-23 12:56:45,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=5808, Unknown=0, NotChecked=0, Total=6006 [2021-11-23 12:56:45,311 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 78 states, 78 states have (on average 4.064102564102564) internal successors, (317), 78 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:50,579 INFO L93 Difference]: Finished difference Result 347 states and 348 transitions. [2021-11-23 12:56:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-23 12:56:50,580 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 4.064102564102564) internal successors, (317), 78 states have internal predecessors, (317), 0 states have call successors, (0), 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 214 [2021-11-23 12:56:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:50,581 INFO L225 Difference]: With dead ends: 347 [2021-11-23 12:56:50,581 INFO L226 Difference]: Without dead ends: 222 [2021-11-23 12:56:50,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 396 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=653, Invalid=14353, Unknown=0, NotChecked=0, Total=15006 [2021-11-23 12:56:50,583 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 581 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 7270 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 4683 SdHoareTripleChecker+Invalid, 7476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 7270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:50,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 4683 Invalid, 7476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 7270 Invalid, 0 Unknown, 82 Unchecked, 2.9s Time] [2021-11-23 12:56:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-23 12:56:50,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2021-11-23 12:56:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:50,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2021-11-23 12:56:50,589 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 214 [2021-11-23 12:56:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:50,589 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2021-11-23 12:56:50,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 4.064102564102564) internal successors, (317), 78 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:56:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2021-11-23 12:56:50,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-23 12:56:50,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:50,591 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:50,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:50,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-23 12:56:50,813 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:56:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:50,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1579618309, now seen corresponding path program 34 times [2021-11-23 12:56:50,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:56:50,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976170553] [2021-11-23 12:56:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:50,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:56:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 703 proven. 1439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:52,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:56:52,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976170553] [2021-11-23 12:56:52,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976170553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:56:52,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733829320] [2021-11-23 12:56:52,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:56:52,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:56:52,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:56:52,440 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:56:52,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 12:56:52,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:56:52,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:56:52,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-23 12:56:52,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 780 proven. 1362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:54,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:56,359 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 21 treesize of output 17 [2021-11-23 12:56:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 780 proven. 1362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:58,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733829320] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:56:58,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:56:58,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 115 [2021-11-23 12:56:58,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724583149] [2021-11-23 12:56:58,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:56:58,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-23 12:56:58,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:56:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-23 12:56:58,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1817, Invalid=11523, Unknown=0, NotChecked=0, Total=13340 [2021-11-23 12:56:58,112 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand has 116 states, 115 states have (on average 4.582608695652174) internal successors, (527), 116 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:01,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:57:01,061 INFO L93 Difference]: Finished difference Result 230 states and 231 transitions. [2021-11-23 12:57:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-23 12:57:01,062 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 4.582608695652174) internal successors, (527), 116 states have internal predecessors, (527), 0 states have call successors, (0), 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 218 [2021-11-23 12:57:01,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:57:01,063 INFO L225 Difference]: With dead ends: 230 [2021-11-23 12:57:01,063 INFO L226 Difference]: Without dead ends: 230 [2021-11-23 12:57:01,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5618 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3819, Invalid=15641, Unknown=0, NotChecked=0, Total=19460 [2021-11-23 12:57:01,064 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 958 mSDsluCounter, 2558 mSDsCounter, 0 mSdLazyCounter, 4350 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 4542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 4350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:57:01,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [958 Valid, 2649 Invalid, 4542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 4350 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 12:57:01,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-23 12:57:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2021-11-23 12:57:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2021-11-23 12:57:01,070 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 218 [2021-11-23 12:57:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:57:01,071 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2021-11-23 12:57:01,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 4.582608695652174) internal successors, (527), 116 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2021-11-23 12:57:01,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-23 12:57:01,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:57:01,073 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:57:01,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-23 12:57:01,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:57:01,301 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:57:01,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:57:01,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2008611953, now seen corresponding path program 35 times [2021-11-23 12:57:01,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:57:01,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928451110] [2021-11-23 12:57:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:57:01,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:57:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:57:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:02,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:57:02,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928451110] [2021-11-23 12:57:02,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928451110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:57:02,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664822584] [2021-11-23 12:57:02,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:57:02,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:57:02,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:57:02,980 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:57:02,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-23 12:57:03,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-23 12:57:03,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:57:03,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-23 12:57:03,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:57:04,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:57:05,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:57:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:05,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:57:05,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:57:05,962 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 26 treesize of output 22 [2021-11-23 12:57:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:06,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664822584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:57:06,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:57:06,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 81 [2021-11-23 12:57:06,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138438706] [2021-11-23 12:57:06,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:57:06,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-23 12:57:06,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:57:06,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-23 12:57:06,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6275, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 12:57:06,406 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:57:12,125 INFO L93 Difference]: Finished difference Result 363 states and 364 transitions. [2021-11-23 12:57:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-23 12:57:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 0 states have call successors, (0), 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 224 [2021-11-23 12:57:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:57:12,127 INFO L225 Difference]: With dead ends: 363 [2021-11-23 12:57:12,127 INFO L226 Difference]: Without dead ends: 232 [2021-11-23 12:57:12,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 415 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=679, Invalid=15577, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 12:57:12,129 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 715 mSDsluCounter, 4648 mSDsCounter, 0 mSdLazyCounter, 7342 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 4737 SdHoareTripleChecker+Invalid, 7627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 7342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:57:12,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 4737 Invalid, 7627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 7342 Invalid, 0 Unknown, 135 Unchecked, 3.1s Time] [2021-11-23 12:57:12,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-23 12:57:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2021-11-23 12:57:12,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2021-11-23 12:57:12,134 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 224 [2021-11-23 12:57:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:57:12,134 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2021-11-23 12:57:12,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:12,135 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2021-11-23 12:57:12,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-23 12:57:12,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:57:12,137 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:57:12,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-23 12:57:12,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-23 12:57:12,349 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:57:12,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:57:12,349 INFO L85 PathProgramCache]: Analyzing trace with hash 229928722, now seen corresponding path program 36 times [2021-11-23 12:57:12,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:57:12,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734353004] [2021-11-23 12:57:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:57:12,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:57:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:57:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 780 proven. 1574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:13,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:57:13,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734353004] [2021-11-23 12:57:13,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734353004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:57:13,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539514247] [2021-11-23 12:57:13,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:57:13,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:57:13,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:57:13,778 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:57:13,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 12:57:15,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-23 12:57:15,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:57:15,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-23 12:57:15,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:57:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 861 proven. 1493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:17,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:57:19,577 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 7 treesize of output 5 [2021-11-23 12:57:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 861 proven. 1493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:19,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539514247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:57:19,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:57:19,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 121 [2021-11-23 12:57:19,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088700845] [2021-11-23 12:57:19,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:57:19,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-23 12:57:19,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:57:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-23 12:57:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2259, Invalid=12503, Unknown=0, NotChecked=0, Total=14762 [2021-11-23 12:57:19,768 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 122 states, 121 states have (on average 4.859504132231405) internal successors, (588), 122 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:57:21,604 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2021-11-23 12:57:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 12:57:21,605 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 4.859504132231405) internal successors, (588), 122 states have internal predecessors, (588), 0 states have call successors, (0), 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 228 [2021-11-23 12:57:21,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:57:21,606 INFO L225 Difference]: With dead ends: 240 [2021-11-23 12:57:21,606 INFO L226 Difference]: Without dead ends: 240 [2021-11-23 12:57:21,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6226 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4175, Invalid=17287, Unknown=0, NotChecked=0, Total=21462 [2021-11-23 12:57:21,607 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 980 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:57:21,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 1605 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 12:57:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-23 12:57:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2021-11-23 12:57:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0085470085470085) internal successors, (236), 234 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2021-11-23 12:57:21,612 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 228 [2021-11-23 12:57:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:57:21,613 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2021-11-23 12:57:21,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 4.859504132231405) internal successors, (588), 122 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2021-11-23 12:57:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-23 12:57:21,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:57:21,615 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:57:21,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-23 12:57:21,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:57:21,841 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:57:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:57:21,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1542886758, now seen corresponding path program 37 times [2021-11-23 12:57:21,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:57:21,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716847513] [2021-11-23 12:57:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:57:21,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:57:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:57:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 89 proven. 2398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:23,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:57:23,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716847513] [2021-11-23 12:57:23,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716847513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:57:23,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798832195] [2021-11-23 12:57:23,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:57:23,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:57:23,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:57:23,621 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:57:23,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 12:57:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:57:23,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-23 12:57:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:57:25,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:57:25,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:57:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 89 proven. 2398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:25,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:57:26,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:57:26,335 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 26 treesize of output 22 [2021-11-23 12:57:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 89 proven. 2398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:26,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798832195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:57:26,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:57:26,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 84 [2021-11-23 12:57:26,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631577058] [2021-11-23 12:57:26,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:57:26,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-23 12:57:26,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:57:26,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-23 12:57:26,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=6760, Unknown=0, NotChecked=0, Total=6972 [2021-11-23 12:57:26,786 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 84 states, 84 states have (on average 4.107142857142857) internal successors, (345), 84 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:57:32,763 INFO L93 Difference]: Finished difference Result 379 states and 380 transitions. [2021-11-23 12:57:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-23 12:57:32,764 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 4.107142857142857) internal successors, (345), 84 states have internal predecessors, (345), 0 states have call successors, (0), 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 234 [2021-11-23 12:57:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:57:32,765 INFO L225 Difference]: With dead ends: 379 [2021-11-23 12:57:32,765 INFO L226 Difference]: Without dead ends: 242 [2021-11-23 12:57:32,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 434 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=705, Invalid=16851, Unknown=0, NotChecked=0, Total=17556 [2021-11-23 12:57:32,767 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 516 mSDsluCounter, 5478 mSDsCounter, 0 mSdLazyCounter, 8738 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 5571 SdHoareTripleChecker+Invalid, 8851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 8738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:57:32,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 5571 Invalid, 8851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 8738 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 12:57:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-23 12:57:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2021-11-23 12:57:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 238 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2021-11-23 12:57:32,773 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 234 [2021-11-23 12:57:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:57:32,773 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2021-11-23 12:57:32,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 4.107142857142857) internal successors, (345), 84 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2021-11-23 12:57:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-23 12:57:32,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:57:32,776 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:57:32,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 12:57:32,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-23 12:57:32,985 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:57:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:57:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash -2065581783, now seen corresponding path program 38 times [2021-11-23 12:57:32,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:57:32,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543769287] [2021-11-23 12:57:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:57:32,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:57:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:57:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 861 proven. 1715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:34,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:57:34,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543769287] [2021-11-23 12:57:34,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543769287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:57:34,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755841836] [2021-11-23 12:57:34,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:57:34,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:57:34,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:57:34,289 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:57:34,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 12:57:34,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:57:34,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:57:34,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-23 12:57:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:57:34,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:57:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 946 proven. 1630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:37,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:57:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 1035 proven. 1541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:42,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755841836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:57:42,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:57:42,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 147 [2021-11-23 12:57:42,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733442304] [2021-11-23 12:57:42,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:57:42,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2021-11-23 12:57:42,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:57:42,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-11-23 12:57:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2559, Invalid=19197, Unknown=0, NotChecked=0, Total=21756 [2021-11-23 12:57:42,011 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand has 148 states, 147 states have (on average 4.789115646258503) internal successors, (704), 148 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:57:45,590 INFO L93 Difference]: Finished difference Result 250 states and 251 transitions. [2021-11-23 12:57:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-23 12:57:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 147 states have (on average 4.789115646258503) internal successors, (704), 148 states have internal predecessors, (704), 0 states have call successors, (0), 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 238 [2021-11-23 12:57:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:57:45,592 INFO L225 Difference]: With dead ends: 250 [2021-11-23 12:57:45,592 INFO L226 Difference]: Without dead ends: 250 [2021-11-23 12:57:45,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10316 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4882, Invalid=25220, Unknown=0, NotChecked=0, Total=30102 [2021-11-23 12:57:45,594 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 916 mSDsluCounter, 3507 mSDsCounter, 0 mSdLazyCounter, 5512 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 3606 SdHoareTripleChecker+Invalid, 5692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 5512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:57:45,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 3606 Invalid, 5692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 5512 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 12:57:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-23 12:57:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2021-11-23 12:57:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2021-11-23 12:57:45,600 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 238 [2021-11-23 12:57:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:57:45,601 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2021-11-23 12:57:45,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 147 states have (on average 4.789115646258503) internal successors, (704), 148 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2021-11-23 12:57:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-23 12:57:45,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:57:45,604 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:57:45,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-23 12:57:45,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:57:45,829 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:57:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:57:45,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1261679165, now seen corresponding path program 39 times [2021-11-23 12:57:45,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:57:45,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550604777] [2021-11-23 12:57:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:57:45,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:57:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:57:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:47,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:57:47,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550604777] [2021-11-23 12:57:47,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550604777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:57:47,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581080889] [2021-11-23 12:57:47,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:57:47,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:57:47,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:57:47,921 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:57:47,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-23 12:57:49,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-11-23 12:57:49,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:57:49,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 154 conjunts are in the unsatisfiable core [2021-11-23 12:57:49,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:57:51,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:57:51,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:57:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:51,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:57:52,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:57:52,343 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 26 treesize of output 22 [2021-11-23 12:57:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:57:52,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581080889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:57:52,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:57:52,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 87 [2021-11-23 12:57:52,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774497523] [2021-11-23 12:57:52,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:57:52,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-23 12:57:52,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:57:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-23 12:57:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=7263, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 12:57:52,789 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:57:59,079 INFO L93 Difference]: Finished difference Result 395 states and 396 transitions. [2021-11-23 12:57:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-23 12:57:59,080 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 0 states have call successors, (0), 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 244 [2021-11-23 12:57:59,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:57:59,081 INFO L225 Difference]: With dead ends: 395 [2021-11-23 12:57:59,081 INFO L226 Difference]: Without dead ends: 252 [2021-11-23 12:57:59,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 453 SyntacticMatches, 3 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=731, Invalid=18175, Unknown=0, NotChecked=0, Total=18906 [2021-11-23 12:57:59,082 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 536 mSDsluCounter, 5949 mSDsCounter, 0 mSdLazyCounter, 9533 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 6046 SdHoareTripleChecker+Invalid, 9650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 9533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:57:59,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 6046 Invalid, 9650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 9533 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-23 12:57:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-23 12:57:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2021-11-23 12:57:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2021-11-23 12:57:59,087 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 244 [2021-11-23 12:57:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:57:59,088 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2021-11-23 12:57:59,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:57:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2021-11-23 12:57:59,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-23 12:57:59,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:57:59,090 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:57:59,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-23 12:57:59,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-23 12:57:59,305 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:57:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:57:59,305 INFO L85 PathProgramCache]: Analyzing trace with hash 956513856, now seen corresponding path program 40 times [2021-11-23 12:57:59,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:57:59,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476509375] [2021-11-23 12:57:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:57:59,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:57:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:58:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 946 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:00,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:58:00,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476509375] [2021-11-23 12:58:00,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476509375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:58:00,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321599458] [2021-11-23 12:58:00,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:58:00,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:00,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:58:00,811 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:58:00,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 12:58:01,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:58:01,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:58:01,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 135 conjunts are in the unsatisfiable core [2021-11-23 12:58:01,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:58:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1035 proven. 1773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:03,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:58:05,526 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 21 treesize of output 17 [2021-11-23 12:58:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1035 proven. 1773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:07,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321599458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:58:07,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:58:07,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 130 [2021-11-23 12:58:07,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258973825] [2021-11-23 12:58:07,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:58:07,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-23 12:58:07,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:58:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-23 12:58:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2324, Invalid=14706, Unknown=0, NotChecked=0, Total=17030 [2021-11-23 12:58:07,633 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 131 states, 130 states have (on average 4.607692307692307) internal successors, (599), 131 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:58:11,189 INFO L93 Difference]: Finished difference Result 260 states and 261 transitions. [2021-11-23 12:58:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-23 12:58:11,190 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 4.607692307692307) internal successors, (599), 131 states have internal predecessors, (599), 0 states have call successors, (0), 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 248 [2021-11-23 12:58:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:58:11,191 INFO L225 Difference]: With dead ends: 260 [2021-11-23 12:58:11,192 INFO L226 Difference]: Without dead ends: 260 [2021-11-23 12:58:11,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 416 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7250 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4860, Invalid=19946, Unknown=0, NotChecked=0, Total=24806 [2021-11-23 12:58:11,194 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1878 mSDsluCounter, 3426 mSDsCounter, 0 mSdLazyCounter, 5800 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 3529 SdHoareTripleChecker+Invalid, 6172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 5800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:58:11,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1878 Valid, 3529 Invalid, 6172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 5800 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 12:58:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-23 12:58:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 255. [2021-11-23 12:58:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2021-11-23 12:58:11,200 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 248 [2021-11-23 12:58:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:58:11,201 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2021-11-23 12:58:11,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 4.607692307692307) internal successors, (599), 131 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:11,201 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2021-11-23 12:58:11,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-23 12:58:11,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:58:11,203 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:58:11,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-23 12:58:11,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:11,419 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:58:11,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:58:11,420 INFO L85 PathProgramCache]: Analyzing trace with hash 838164, now seen corresponding path program 41 times [2021-11-23 12:58:11,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:58:11,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906467224] [2021-11-23 12:58:11,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:58:11,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:58:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:58:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 97 proven. 2856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:13,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:58:13,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906467224] [2021-11-23 12:58:13,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906467224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:58:13,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618665511] [2021-11-23 12:58:13,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:58:13,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:13,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:58:13,382 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:58:13,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-23 12:58:14,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-11-23 12:58:14,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:58:14,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 162 conjunts are in the unsatisfiable core [2021-11-23 12:58:14,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:58:15,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:58:16,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:58:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 97 proven. 2856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:16,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:58:16,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:58:16,940 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 26 treesize of output 22 [2021-11-23 12:58:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 97 proven. 2856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:17,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618665511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:58:17,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:58:17,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 90 [2021-11-23 12:58:17,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684739883] [2021-11-23 12:58:17,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:58:17,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-23 12:58:17,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:58:17,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-23 12:58:17,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=7784, Unknown=0, NotChecked=0, Total=8010 [2021-11-23 12:58:17,402 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand has 90 states, 90 states have (on average 4.144444444444445) internal successors, (373), 90 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:24,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:58:24,299 INFO L93 Difference]: Finished difference Result 411 states and 412 transitions. [2021-11-23 12:58:24,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-23 12:58:24,300 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 4.144444444444445) internal successors, (373), 90 states have internal predecessors, (373), 0 states have call successors, (0), 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 254 [2021-11-23 12:58:24,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:58:24,301 INFO L225 Difference]: With dead ends: 411 [2021-11-23 12:58:24,301 INFO L226 Difference]: Without dead ends: 262 [2021-11-23 12:58:24,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 472 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=757, Invalid=19549, Unknown=0, NotChecked=0, Total=20306 [2021-11-23 12:58:24,302 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 691 mSDsluCounter, 6577 mSDsCounter, 0 mSdLazyCounter, 10325 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 6678 SdHoareTripleChecker+Invalid, 10586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 10325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:58:24,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 6678 Invalid, 10586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 10325 Invalid, 0 Unknown, 113 Unchecked, 3.9s Time] [2021-11-23 12:58:24,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-23 12:58:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 259. [2021-11-23 12:58:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0077519379844961) internal successors, (260), 258 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2021-11-23 12:58:24,308 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254 [2021-11-23 12:58:24,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:58:24,308 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2021-11-23 12:58:24,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 4.144444444444445) internal successors, (373), 90 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:24,309 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2021-11-23 12:58:24,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-23 12:58:24,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:58:24,311 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:58:24,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-23 12:58:24,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:24,525 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:58:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:58:24,525 INFO L85 PathProgramCache]: Analyzing trace with hash 126578263, now seen corresponding path program 42 times [2021-11-23 12:58:24,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:58:24,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236402832] [2021-11-23 12:58:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:58:24,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:58:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:58:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3050 backedges. 1035 proven. 2015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:26,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:58:26,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236402832] [2021-11-23 12:58:26,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236402832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:58:26,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180493826] [2021-11-23 12:58:26,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:58:26,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:26,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:58:26,208 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:58:26,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-23 12:58:29,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-11-23 12:58:29,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:58:29,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-23 12:58:29,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:58:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3050 backedges. 1128 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:32,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:58:34,891 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 7 treesize of output 5 [2021-11-23 12:58:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3050 backedges. 1128 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:35,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180493826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:58:35,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:58:35,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 136 [2021-11-23 12:58:35,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157214776] [2021-11-23 12:58:35,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:58:35,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-11-23 12:58:35,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:58:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-11-23 12:58:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2862, Invalid=15770, Unknown=0, NotChecked=0, Total=18632 [2021-11-23 12:58:35,162 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand has 137 states, 136 states have (on average 4.897058823529412) internal successors, (666), 137 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:58:37,656 INFO L93 Difference]: Finished difference Result 270 states and 271 transitions. [2021-11-23 12:58:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-23 12:58:37,657 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 136 states have (on average 4.897058823529412) internal successors, (666), 137 states have internal predecessors, (666), 0 states have call successors, (0), 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 258 [2021-11-23 12:58:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:58:37,658 INFO L225 Difference]: With dead ends: 270 [2021-11-23 12:58:37,658 INFO L226 Difference]: Without dead ends: 270 [2021-11-23 12:58:37,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 432 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7900 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5261, Invalid=21799, Unknown=0, NotChecked=0, Total=27060 [2021-11-23 12:58:37,660 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1655 mSDsluCounter, 1785 mSDsCounter, 0 mSdLazyCounter, 2695 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 3002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:58:37,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1655 Valid, 1892 Invalid, 3002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2695 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 12:58:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-23 12:58:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 265. [2021-11-23 12:58:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2021-11-23 12:58:37,667 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 258 [2021-11-23 12:58:37,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:58:37,667 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2021-11-23 12:58:37,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 136 states have (on average 4.897058823529412) internal successors, (666), 137 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2021-11-23 12:58:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-23 12:58:37,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:58:37,670 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:58:37,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-23 12:58:37,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-23 12:58:37,893 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:58:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:58:37,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1268757269, now seen corresponding path program 43 times [2021-11-23 12:58:37,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:58:37,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446437454] [2021-11-23 12:58:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:58:37,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:58:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:58:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:40,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:58:40,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446437454] [2021-11-23 12:58:40,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446437454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:58:40,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887448551] [2021-11-23 12:58:40,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:58:40,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:40,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:58:40,017 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:58:40,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 12:58:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:58:40,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 168 conjunts are in the unsatisfiable core [2021-11-23 12:58:40,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:58:41,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:58:42,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:58:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:42,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:58:43,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:58:43,222 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 26 treesize of output 22 [2021-11-23 12:58:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:43,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887448551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:58:43,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:58:43,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 93 [2021-11-23 12:58:43,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522372403] [2021-11-23 12:58:43,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:58:43,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-23 12:58:43,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:58:43,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-23 12:58:43,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=8323, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 12:58:43,728 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:51,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:58:51,693 INFO L93 Difference]: Finished difference Result 427 states and 428 transitions. [2021-11-23 12:58:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-23 12:58:51,693 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 0 states have call successors, (0), 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 264 [2021-11-23 12:58:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:58:51,695 INFO L225 Difference]: With dead ends: 427 [2021-11-23 12:58:51,695 INFO L226 Difference]: Without dead ends: 272 [2021-11-23 12:58:51,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 491 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=783, Invalid=20973, Unknown=0, NotChecked=0, Total=21756 [2021-11-23 12:58:51,697 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 843 mSDsluCounter, 6906 mSDsCounter, 0 mSdLazyCounter, 10818 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 7011 SdHoareTripleChecker+Invalid, 11154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 10818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:58:51,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 7011 Invalid, 11154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 10818 Invalid, 0 Unknown, 158 Unchecked, 4.5s Time] [2021-11-23 12:58:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-23 12:58:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2021-11-23 12:58:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.007462686567164) internal successors, (270), 268 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2021-11-23 12:58:51,703 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 264 [2021-11-23 12:58:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:58:51,703 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2021-11-23 12:58:51,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:58:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2021-11-23 12:58:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-23 12:58:51,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:58:51,706 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:58:51,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 12:58:51,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:51,931 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:58:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:58:51,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1891416430, now seen corresponding path program 44 times [2021-11-23 12:58:51,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:58:51,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719191466] [2021-11-23 12:58:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:58:51,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:58:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:58:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1128 proven. 2174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:53,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:58:53,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719191466] [2021-11-23 12:58:53,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719191466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:58:53,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157902058] [2021-11-23 12:58:53,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:58:53,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:58:53,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:58:53,731 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:58:53,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-23 12:58:53,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:58:53,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:58:53,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 142 conjunts are in the unsatisfiable core [2021-11-23 12:58:53,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:58:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1225 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:56,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:58:58,514 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 5 treesize of output 3 [2021-11-23 12:58:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1225 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:58:58,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157902058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:58:58,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:58:58,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 57, 57] total 115 [2021-11-23 12:58:58,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335459228] [2021-11-23 12:58:58,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:58:58,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-23 12:58:58,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:58:58,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-23 12:58:58,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1625, Invalid=11715, Unknown=0, NotChecked=0, Total=13340 [2021-11-23 12:58:58,802 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 116 states, 115 states have (on average 4.7043478260869565) internal successors, (541), 116 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:59:03,090 INFO L93 Difference]: Finished difference Result 280 states and 281 transitions. [2021-11-23 12:59:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-23 12:59:03,091 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 4.7043478260869565) internal successors, (541), 116 states have internal predecessors, (541), 0 states have call successors, (0), 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 268 [2021-11-23 12:59:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:59:03,092 INFO L225 Difference]: With dead ends: 280 [2021-11-23 12:59:03,092 INFO L226 Difference]: Without dead ends: 280 [2021-11-23 12:59:03,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 474 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5622 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3771, Invalid=17109, Unknown=0, NotChecked=0, Total=20880 [2021-11-23 12:59:03,094 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 1451 mSDsluCounter, 3258 mSDsCounter, 0 mSdLazyCounter, 5298 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 3369 SdHoareTripleChecker+Invalid, 5564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 5298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:59:03,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1451 Valid, 3369 Invalid, 5564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 5298 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 12:59:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-23 12:59:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 275. [2021-11-23 12:59:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0072992700729928) internal successors, (276), 274 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2021-11-23 12:59:03,101 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 268 [2021-11-23 12:59:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:59:03,102 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2021-11-23 12:59:03,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 4.7043478260869565) internal successors, (541), 116 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:03,102 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2021-11-23 12:59:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-23 12:59:03,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:59:03,105 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:59:03,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-23 12:59:03,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:59:03,329 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:59:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:59:03,329 INFO L85 PathProgramCache]: Analyzing trace with hash -388191550, now seen corresponding path program 45 times [2021-11-23 12:59:03,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:59:03,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494601971] [2021-11-23 12:59:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:59:03,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:59:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:59:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:59:05,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:59:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494601971] [2021-11-23 12:59:05,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494601971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:59:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068256465] [2021-11-23 12:59:05,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:59:05,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:59:05,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:59:05,473 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:59:05,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-23 12:59:12,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-23 12:59:12,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:59:12,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 176 conjunts are in the unsatisfiable core [2021-11-23 12:59:12,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:59:14,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:59:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:59:14,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:59:15,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:59:15,344 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 26 treesize of output 22 [2021-11-23 12:59:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:59:15,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068256465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:59:15,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:59:15,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 98 [2021-11-23 12:59:15,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825650103] [2021-11-23 12:59:15,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:59:15,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-23 12:59:15,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:59:15,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-23 12:59:15,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=9258, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 12:59:15,892 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand has 98 states, 98 states have (on average 4.122448979591836) internal successors, (404), 98 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:23,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:59:23,873 INFO L93 Difference]: Finished difference Result 443 states and 444 transitions. [2021-11-23 12:59:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-23 12:59:23,874 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.122448979591836) internal successors, (404), 98 states have internal predecessors, (404), 0 states have call successors, (0), 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 274 [2021-11-23 12:59:23,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:59:23,876 INFO L225 Difference]: With dead ends: 443 [2021-11-23 12:59:23,876 INFO L226 Difference]: Without dead ends: 282 [2021-11-23 12:59:23,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 508 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=820, Invalid=23050, Unknown=0, NotChecked=0, Total=23870 [2021-11-23 12:59:23,878 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 608 mSDsluCounter, 7234 mSDsCounter, 0 mSdLazyCounter, 11378 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 7343 SdHoareTripleChecker+Invalid, 11676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 11378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:59:23,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 7343 Invalid, 11676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 11378 Invalid, 0 Unknown, 165 Unchecked, 4.4s Time] [2021-11-23 12:59:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-23 12:59:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 279. [2021-11-23 12:59:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2021-11-23 12:59:23,885 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2021-11-23 12:59:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:59:23,885 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2021-11-23 12:59:23,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.122448979591836) internal successors, (404), 98 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:23,886 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2021-11-23 12:59:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-23 12:59:23,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:59:23,888 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:59:23,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-23 12:59:24,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:59:24,117 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:59:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:59:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1901490299, now seen corresponding path program 46 times [2021-11-23 12:59:24,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:59:24,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705321179] [2021-11-23 12:59:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:59:24,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:59:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:59:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1225 proven. 2339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:59:25,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:59:25,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705321179] [2021-11-23 12:59:25,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705321179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:59:25,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895026148] [2021-11-23 12:59:25,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:59:25,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:59:25,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:59:25,983 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:59:25,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-23 12:59:26,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:59:26,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:59:26,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-23 12:59:26,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:59:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1326 proven. 2238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:59:29,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:59:31,500 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 21 treesize of output 17 [2021-11-23 12:59:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1326 proven. 2238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:59:33,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895026148] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:59:33,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:59:33,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 145 [2021-11-23 12:59:33,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132533467] [2021-11-23 12:59:33,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:59:33,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-11-23 12:59:33,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:59:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-11-23 12:59:33,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2894, Invalid=18276, Unknown=0, NotChecked=0, Total=21170 [2021-11-23 12:59:33,998 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand has 146 states, 145 states have (on average 4.627586206896551) internal successors, (671), 146 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:59:37,936 INFO L93 Difference]: Finished difference Result 290 states and 291 transitions. [2021-11-23 12:59:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-23 12:59:37,936 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 4.627586206896551) internal successors, (671), 146 states have internal predecessors, (671), 0 states have call successors, (0), 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 278 [2021-11-23 12:59:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:59:37,938 INFO L225 Difference]: With dead ends: 290 [2021-11-23 12:59:37,938 INFO L226 Difference]: Without dead ends: 290 [2021-11-23 12:59:37,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 467 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9089 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=6027, Invalid=24773, Unknown=0, NotChecked=0, Total=30800 [2021-11-23 12:59:37,940 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 2241 mSDsluCounter, 3542 mSDsCounter, 0 mSdLazyCounter, 5724 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2241 SdHoareTripleChecker+Valid, 3657 SdHoareTripleChecker+Invalid, 6164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 5724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:59:37,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2241 Valid, 3657 Invalid, 6164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 5724 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 12:59:37,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-23 12:59:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 285. [2021-11-23 12:59:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2021-11-23 12:59:37,945 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 278 [2021-11-23 12:59:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:59:37,946 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2021-11-23 12:59:37,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 4.627586206896551) internal successors, (671), 146 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2021-11-23 12:59:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-23 12:59:37,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:59:37,948 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:59:37,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-23 12:59:38,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-23 12:59:38,165 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:59:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:59:38,165 INFO L85 PathProgramCache]: Analyzing trace with hash 469783449, now seen corresponding path program 47 times [2021-11-23 12:59:38,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:59:38,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843483599] [2021-11-23 12:59:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:59:38,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:59:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:59:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:59:40,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:59:40,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843483599] [2021-11-23 12:59:40,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843483599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:59:40,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954789205] [2021-11-23 12:59:40,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:59:40,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:59:40,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:59:40,620 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:59:40,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-23 12:59:41,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-11-23 12:59:41,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:59:41,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 178 conjunts are in the unsatisfiable core [2021-11-23 12:59:41,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:59:43,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:59:44,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:59:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:59:44,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:59:45,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 12:59:45,072 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 26 treesize of output 22 [2021-11-23 12:59:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:59:45,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954789205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:59:45,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:59:45,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 99 [2021-11-23 12:59:45,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985820983] [2021-11-23 12:59:45,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:59:45,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-23 12:59:45,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:59:45,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-23 12:59:45,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=9455, Unknown=0, NotChecked=0, Total=9702 [2021-11-23 12:59:45,616 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:59:54,245 INFO L93 Difference]: Finished difference Result 459 states and 460 transitions. [2021-11-23 12:59:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-23 12:59:54,246 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 0 states have call successors, (0), 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 284 [2021-11-23 12:59:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:59:54,248 INFO L225 Difference]: With dead ends: 459 [2021-11-23 12:59:54,248 INFO L226 Difference]: Without dead ends: 292 [2021-11-23 12:59:54,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 529 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2588 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=835, Invalid=23971, Unknown=0, NotChecked=0, Total=24806 [2021-11-23 12:59:54,251 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 482 mSDsluCounter, 7824 mSDsCounter, 0 mSdLazyCounter, 12162 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 7937 SdHoareTripleChecker+Invalid, 12530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 12162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:59:54,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 7937 Invalid, 12530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 12162 Invalid, 0 Unknown, 258 Unchecked, 4.8s Time] [2021-11-23 12:59:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-23 12:59:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2021-11-23 12:59:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2021-11-23 12:59:54,257 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 284 [2021-11-23 12:59:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:59:54,258 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2021-11-23 12:59:54,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:59:54,258 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2021-11-23 12:59:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-23 12:59:54,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:59:54,260 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:59:54,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-23 12:59:54,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-23 12:59:54,477 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 12:59:54,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:59:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash 204759196, now seen corresponding path program 48 times [2021-11-23 12:59:54,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:59:54,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792714681] [2021-11-23 12:59:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:59:54,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:59:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:59:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 1326 proven. 2510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:59:56,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:59:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792714681] [2021-11-23 12:59:56,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792714681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:59:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325467805] [2021-11-23 12:59:56,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:59:56,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:59:56,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:59:56,528 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:59:56,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-23 13:00:02,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-23 13:00:02,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:00:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-23 13:00:02,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:00:02,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 13:00:02,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 13:00:04,796 INFO L354 Elim1Store]: treesize reduction 3, result has 76.9 percent of original size [2021-11-23 13:00:04,796 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 27 treesize of output 24 [2021-11-23 13:00:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 81 proven. 82 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2021-11-23 13:00:04,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:00:07,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-23 13:00:07,681 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 37 treesize of output 35 [2021-11-23 13:00:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2021-11-23 13:00:08,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325467805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:00:08,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:00:08,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 9, 9] total 76 [2021-11-23 13:00:08,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071756648] [2021-11-23 13:00:08,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:00:08,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-23 13:00:08,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:00:08,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-23 13:00:08,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=5069, Unknown=0, NotChecked=0, Total=5852 [2021-11-23 13:00:08,321 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 77 states, 76 states have (on average 4.342105263157895) internal successors, (330), 77 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:00:13,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:00:13,619 INFO L93 Difference]: Finished difference Result 294 states and 295 transitions. [2021-11-23 13:00:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-11-23 13:00:13,619 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 4.342105263157895) internal successors, (330), 77 states have internal predecessors, (330), 0 states have call successors, (0), 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 288 [2021-11-23 13:00:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:00:13,619 INFO L225 Difference]: With dead ends: 294 [2021-11-23 13:00:13,619 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 13:00:13,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11260 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2604, Invalid=34838, Unknown=0, NotChecked=0, Total=37442 [2021-11-23 13:00:13,621 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 159 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 523 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:00:13,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1497 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1162 Invalid, 0 Unknown, 523 Unchecked, 0.5s Time] [2021-11-23 13:00:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 13:00:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 13:00:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:00:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 13:00:13,623 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 288 [2021-11-23 13:00:13,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:00:13,623 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 13:00:13,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 4.342105263157895) internal successors, (330), 77 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:00:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 13:00:13,624 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 13:00:13,626 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (10 of 11 remaining) [2021-11-23 13:00:13,627 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (9 of 11 remaining) [2021-11-23 13:00:13,627 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (8 of 11 remaining) [2021-11-23 13:00:13,627 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (7 of 11 remaining) [2021-11-23 13:00:13,628 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (6 of 11 remaining) [2021-11-23 13:00:13,628 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (5 of 11 remaining) [2021-11-23 13:00:13,628 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (4 of 11 remaining) [2021-11-23 13:00:13,628 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (3 of 11 remaining) [2021-11-23 13:00:13,629 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (2 of 11 remaining) [2021-11-23 13:00:13,629 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (1 of 11 remaining) [2021-11-23 13:00:13,629 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2021-11-23 13:00:13,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-23 13:00:13,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-23 13:00:13,848 INFO L732 BasicCegarLoop]: Path program histogram: [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:00:13,850 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 13:00:13,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:00:13 BoogieIcfgContainer [2021-11-23 13:00:13,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 13:00:13,857 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 13:00:13,857 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 13:00:13,858 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 13:00:13,858 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:53:50" (3/4) ... [2021-11-23 13:00:13,862 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 13:00:13,878 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-23 13:00:13,879 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-23 13:00:13,879 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 13:00:13,879 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 13:00:13,929 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 13:00:13,930 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 13:00:13,937 INFO L158 Benchmark]: Toolchain (without parser) took 383895.78ms. Allocated memory was 102.8MB in the beginning and 251.7MB in the end (delta: 148.9MB). Free memory was 70.4MB in the beginning and 158.0MB in the end (delta: -87.6MB). Peak memory consumption was 60.6MB. Max. memory is 16.1GB. [2021-11-23 13:00:13,944 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 102.8MB. Free memory was 55.4MB in the beginning and 55.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:00:13,945 INFO L158 Benchmark]: CACSL2BoogieTranslator took 482.69ms. Allocated memory was 102.8MB in the beginning and 144.7MB in the end (delta: 41.9MB). Free memory was 70.4MB in the beginning and 113.5MB in the end (delta: -43.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 13:00:13,945 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.92ms. Allocated memory is still 144.7MB. Free memory was 113.5MB in the beginning and 112.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:00:13,945 INFO L158 Benchmark]: Boogie Preprocessor took 26.88ms. Allocated memory is still 144.7MB. Free memory was 112.0MB in the beginning and 110.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:00:13,945 INFO L158 Benchmark]: RCFGBuilder took 345.11ms. Allocated memory is still 144.7MB. Free memory was 110.6MB in the beginning and 98.8MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 13:00:13,946 INFO L158 Benchmark]: TraceAbstraction took 382914.72ms. Allocated memory was 144.7MB in the beginning and 251.7MB in the end (delta: 107.0MB). Free memory was 98.0MB in the beginning and 160.8MB in the end (delta: -62.8MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. [2021-11-23 13:00:13,946 INFO L158 Benchmark]: Witness Printer took 72.73ms. Allocated memory is still 251.7MB. Free memory was 160.8MB in the beginning and 158.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:00:13,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 102.8MB. Free memory was 55.4MB in the beginning and 55.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 482.69ms. Allocated memory was 102.8MB in the beginning and 144.7MB in the end (delta: 41.9MB). Free memory was 70.4MB in the beginning and 113.5MB in the end (delta: -43.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.92ms. Allocated memory is still 144.7MB. Free memory was 113.5MB in the beginning and 112.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.88ms. Allocated memory is still 144.7MB. Free memory was 112.0MB in the beginning and 110.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 345.11ms. Allocated memory is still 144.7MB. Free memory was 110.6MB in the beginning and 98.8MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 382914.72ms. Allocated memory was 144.7MB in the beginning and 251.7MB in the end (delta: 107.0MB). Free memory was 98.0MB in the beginning and 160.8MB in the end (delta: -62.8MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. * Witness Printer took 72.73ms. Allocated memory is still 251.7MB. Free memory was 160.8MB in the beginning and 158.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 382.8s, OverallIterations: 59, TraceHistogramMax: 28, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.1s, AutomataDifference: 140.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31511 SdHoareTripleChecker+Valid, 74.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31511 mSDsluCounter, 113623 SdHoareTripleChecker+Invalid, 61.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2686 IncrementalHoareTripleChecker+Unchecked, 110305 mSDsCounter, 6008 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 174972 IncrementalHoareTripleChecker+Invalid, 183666 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6008 mSolverCounterUnsat, 3318 mSDtfsCounter, 174972 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18571 GetRequests, 13554 SyntacticMatches, 102 SemanticMatches, 4915 ConstructedPredicates, 0 IntricatePredicates, 38 DeprecatedPredicates, 122756 ImplicationChecksByTransitivity, 183.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=289occurred in iteration=58, InterpolantAutomatonStates: 2313, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 59 MinimizatonAttempts, 323 StatesRemovedByMinimization, 53 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 32.0s SatisfiabilityAnalysisTime, 196.1s InterpolantComputationTime, 15452 NumberOfCodeBlocks, 15452 NumberOfCodeBlocksAsserted, 513 NumberOfCheckSat, 22973 ConstructedInterpolants, 584 QuantifiedInterpolants, 211594 SizeOfPredicates, 580 NumberOfNonLiveVariables, 24967 ConjunctsInSsa, 4482 ConjunctsInUnsatCore, 157 InterpolantComputations, 10 PerfectInterpolantSequences, 48661/205902 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-23 13:00:14,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804b7dec-2734-4a11-b713-5c5b48d296c9/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE