./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa --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 51aa0675891000edd5d1736f3584d06816ce7050b76c01d5b217260a35077c25 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:55:55,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:55:55,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:55:55,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:55:55,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:55:55,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:55:55,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:55:55,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:55:55,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:55:55,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:55:55,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:55:55,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:55:55,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:55:55,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:55:55,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:55:55,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:55:55,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:55:55,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:55:55,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:55:55,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:55:55,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:55:55,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:55:55,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:55:55,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:55:55,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:55:55,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:55:55,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:55:55,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:55:55,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:55:55,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:55:55,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:55:55,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:55:55,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:55:55,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:55:55,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:55:55,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:55:55,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:55:55,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:55:55,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:55:55,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:55:55,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:55:55,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-07 00:55:55,614 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:55:55,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:55:55,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:55:55,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:55:55,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:55:55,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:55:55,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:55:55,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:55:55,616 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:55:55,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:55:55,617 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:55:55,617 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 00:55:55,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:55:55,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:55:55,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:55:55,618 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 00:55:55,618 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 00:55:55,618 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 00:55:55,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:55:55,618 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 00:55:55,618 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:55:55,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:55:55,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:55:55,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:55:55,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:55:55,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:55:55,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:55:55,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:55:55,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:55:55,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:55:55,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:55:55,625 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_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51aa0675891000edd5d1736f3584d06816ce7050b76c01d5b217260a35077c25 [2021-12-07 00:55:55,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:55:55,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:55:55,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:55:55,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:55:55,812 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:55:55,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-12-07 00:55:55,855 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/data/4a87450fe/8589bc1cf4e24867a72062747e073ba1/FLAGcef08c685 [2021-12-07 00:55:56,263 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:55:56,263 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-12-07 00:55:56,273 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/data/4a87450fe/8589bc1cf4e24867a72062747e073ba1/FLAGcef08c685 [2021-12-07 00:55:56,283 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/data/4a87450fe/8589bc1cf4e24867a72062747e073ba1 [2021-12-07 00:55:56,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:55:56,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:55:56,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:55:56,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:55:56,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:55:56,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@739456c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56, skipping insertion in model container [2021-12-07 00:55:56,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:55:56,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:55:56,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:55:56,520 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:55:56,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:55:56,572 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:55:56,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56 WrapperNode [2021-12-07 00:55:56,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:55:56,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:55:56,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:55:56,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:55:56,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,608 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2021-12-07 00:55:56,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:55:56,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:55:56,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:55:56,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:55:56,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:55:56,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:55:56,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:55:56,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:55:56,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56" (1/1) ... [2021-12-07 00:55:56,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:55:56,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:55:56,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:55:56,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:55:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:55:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:55:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:55:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:55:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:55:56,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:55:56,763 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:55:56,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:55:56,930 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:55:56,935 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:55:56,935 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 00:55:56,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:55:56 BoogieIcfgContainer [2021-12-07 00:55:56,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:55:56,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:55:56,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:55:56,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:55:56,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:55:56" (1/3) ... [2021-12-07 00:55:56,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51aee938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:55:56, skipping insertion in model container [2021-12-07 00:55:56,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:56" (2/3) ... [2021-12-07 00:55:56,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51aee938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:55:56, skipping insertion in model container [2021-12-07 00:55:56,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:55:56" (3/3) ... [2021-12-07 00:55:56,943 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncmp-alloca-1.i [2021-12-07 00:55:56,947 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:55:56,947 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-07 00:55:56,980 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:55:56,985 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 [2021-12-07 00:55:56,985 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-07 00:55:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 37 states have (on average 1.864864864864865) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 00:55:57,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:57,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:57,002 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:57,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:57,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-07 00:55:57,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:57,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549730658] [2021-12-07 00:55:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:57,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:57,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:57,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549730658] [2021-12-07 00:55:57,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549730658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:57,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:57,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:55:57,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733475915] [2021-12-07 00:55:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:57,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:55:57,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:57,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:55:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:55:57,178 INFO L87 Difference]: Start difference. First operand has 57 states, 37 states have (on average 1.864864864864865) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 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 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:57,220 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2021-12-07 00:55:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:55:57,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-07 00:55:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:57,228 INFO L225 Difference]: With dead ends: 106 [2021-12-07 00:55:57,228 INFO L226 Difference]: Without dead ends: 102 [2021-12-07 00:55:57,229 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 [2021-12-07 00:55:57,232 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 55 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:57,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 175 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-07 00:55:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 58. [2021-12-07 00:55:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-12-07 00:55:57,258 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 7 [2021-12-07 00:55:57,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:57,259 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-12-07 00:55:57,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,259 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-12-07 00:55:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 00:55:57,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:57,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:57,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:55:57,260 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:57,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-07 00:55:57,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:57,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370003119] [2021-12-07 00:55:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:57,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:57,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:57,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370003119] [2021-12-07 00:55:57,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370003119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:57,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:57,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:55:57,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131347699] [2021-12-07 00:55:57,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:57,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:57,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:57,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:57,309 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:57,337 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-12-07 00:55:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:57,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-07 00:55:57,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:57,338 INFO L225 Difference]: With dead ends: 56 [2021-12-07 00:55:57,339 INFO L226 Difference]: Without dead ends: 56 [2021-12-07 00:55:57,339 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 [2021-12-07 00:55:57,340 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:57,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-07 00:55:57,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-07 00:55:57,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 55 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) [2021-12-07 00:55:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-12-07 00:55:57,345 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 7 [2021-12-07 00:55:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:57,346 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-12-07 00:55:57,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,346 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-12-07 00:55:57,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 00:55:57,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:57,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:57,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:55:57,347 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:57,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:57,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-07 00:55:57,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:57,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805565948] [2021-12-07 00:55:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:57,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:57,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:57,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805565948] [2021-12-07 00:55:57,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805565948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:57,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:57,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:57,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142414634] [2021-12-07 00:55:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:57,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:55:57,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:55:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:55:57,403 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:57,468 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-12-07 00:55:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:55:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-07 00:55:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:57,469 INFO L225 Difference]: With dead ends: 103 [2021-12-07 00:55:57,469 INFO L226 Difference]: Without dead ends: 103 [2021-12-07 00:55:57,470 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 [2021-12-07 00:55:57,471 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 55 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:57,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 115 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:55:57,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-07 00:55:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 58. [2021-12-07 00:55:57,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-12-07 00:55:57,477 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 7 [2021-12-07 00:55:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:57,477 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-12-07 00:55:57,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-12-07 00:55:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-07 00:55:57,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:57,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:57,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:55:57,478 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-07 00:55:57,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:57,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959764583] [2021-12-07 00:55:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:57,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:57,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:57,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959764583] [2021-12-07 00:55:57,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959764583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:57,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:57,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:57,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856612686] [2021-12-07 00:55:57,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:57,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:55:57,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:55:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:55:57,523 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:57,550 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-07 00:55:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:55:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-07 00:55:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:57,551 INFO L225 Difference]: With dead ends: 57 [2021-12-07 00:55:57,551 INFO L226 Difference]: Without dead ends: 57 [2021-12-07 00:55:57,551 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 [2021-12-07 00:55:57,553 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 56 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:57,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 44 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-07 00:55:57,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-07 00:55:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-12-07 00:55:57,560 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 9 [2021-12-07 00:55:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:57,561 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-12-07 00:55:57,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-12-07 00:55:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-07 00:55:57,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:57,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:57,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:55:57,562 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:57,563 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-07 00:55:57,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:57,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163745182] [2021-12-07 00:55:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:57,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:57,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:57,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163745182] [2021-12-07 00:55:57,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163745182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:57,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:57,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:55:57,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381483392] [2021-12-07 00:55:57,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:57,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:55:57,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:57,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:55:57,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:55:57,608 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:57,623 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2021-12-07 00:55:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:55:57,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-07 00:55:57,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:57,625 INFO L225 Difference]: With dead ends: 104 [2021-12-07 00:55:57,625 INFO L226 Difference]: Without dead ends: 104 [2021-12-07 00:55:57,625 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 [2021-12-07 00:55:57,627 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 88 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:57,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 116 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:57,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-07 00:55:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2021-12-07 00:55:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-12-07 00:55:57,633 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 9 [2021-12-07 00:55:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:57,633 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-12-07 00:55:57,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-12-07 00:55:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-07 00:55:57,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:57,634 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:57,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:55:57,634 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:57,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-07 00:55:57,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:57,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9318002] [2021-12-07 00:55:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:57,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:57,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:57,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9318002] [2021-12-07 00:55:57,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9318002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:57,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:57,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:55:57,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025385400] [2021-12-07 00:55:57,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:57,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:57,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:57,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:57,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:57,660 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:57,684 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-12-07 00:55:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:57,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-07 00:55:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:57,685 INFO L225 Difference]: With dead ends: 66 [2021-12-07 00:55:57,685 INFO L226 Difference]: Without dead ends: 66 [2021-12-07 00:55:57,685 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 [2021-12-07 00:55:57,686 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:57,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-07 00:55:57,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-07 00:55:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 65 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2021-12-07 00:55:57,691 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 9 [2021-12-07 00:55:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:57,691 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2021-12-07 00:55:57,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2021-12-07 00:55:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-07 00:55:57,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:57,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:57,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 00:55:57,692 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:57,693 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-07 00:55:57,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:57,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214573621] [2021-12-07 00:55:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:57,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:57,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:57,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214573621] [2021-12-07 00:55:57,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214573621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:57,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:57,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:55:57,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185579283] [2021-12-07 00:55:57,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:57,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:55:57,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:57,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:55:57,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:55:57,743 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:57,795 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-12-07 00:55:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:55:57,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-07 00:55:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:57,796 INFO L225 Difference]: With dead ends: 104 [2021-12-07 00:55:57,796 INFO L226 Difference]: Without dead ends: 104 [2021-12-07 00:55:57,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:55:57,797 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 139 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:57,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 106 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:57,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-07 00:55:57,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2021-12-07 00:55:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.537037037037037) internal successors, (83), 67 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-12-07 00:55:57,802 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 9 [2021-12-07 00:55:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:57,802 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-12-07 00:55:57,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-12-07 00:55:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-07 00:55:57,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:57,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:57,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 00:55:57,803 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:57,804 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-07 00:55:57,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:57,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506049889] [2021-12-07 00:55:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:57,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:57,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:57,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506049889] [2021-12-07 00:55:57,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506049889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:57,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:57,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:57,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970549731] [2021-12-07 00:55:57,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:57,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:55:57,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:57,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:55:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:55:57,841 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:57,865 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2021-12-07 00:55:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:55:57,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-07 00:55:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:57,865 INFO L225 Difference]: With dead ends: 67 [2021-12-07 00:55:57,866 INFO L226 Difference]: Without dead ends: 67 [2021-12-07 00:55:57,866 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 [2021-12-07 00:55:57,866 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 99 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:57,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 41 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-07 00:55:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-07 00:55:57,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 66 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2021-12-07 00:55:57,871 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 10 [2021-12-07 00:55:57,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:57,871 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2021-12-07 00:55:57,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2021-12-07 00:55:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:55:57,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:57,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:57,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 00:55:57,872 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:57,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:57,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-07 00:55:57,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:57,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060484504] [2021-12-07 00:55:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:57,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:57,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:57,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060484504] [2021-12-07 00:55:57,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060484504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:55:57,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934043083] [2021-12-07 00:55:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:57,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:55:57,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:55:57,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:55:57,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:55:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:57,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:55:57,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:55:58,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:55:58,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 00:55:58,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:55:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:58,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:55:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:58,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934043083] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:55:58,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:55:58,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-07 00:55:58,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261248310] [2021-12-07 00:55:58,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:55:58,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:55:58,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:58,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:55:58,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:55:58,275 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:58,421 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-12-07 00:55:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:55:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-07 00:55:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:58,423 INFO L225 Difference]: With dead ends: 158 [2021-12-07 00:55:58,423 INFO L226 Difference]: Without dead ends: 158 [2021-12-07 00:55:58,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:55:58,424 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 229 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:58,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 373 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:55:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-07 00:55:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 62. [2021-12-07 00:55:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.48) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-12-07 00:55:58,430 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 11 [2021-12-07 00:55:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:58,430 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-12-07 00:55:58,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-12-07 00:55:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 00:55:58,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:58,431 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:58,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:55:58,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:55:58,632 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-07 00:55:58,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:58,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496964134] [2021-12-07 00:55:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:58,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:58,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:58,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496964134] [2021-12-07 00:55:58,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496964134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:55:58,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790415154] [2021-12-07 00:55:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:58,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:55:58,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:55:58,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:55:58,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:55:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:58,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:55:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:55:58,737 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:55:58,737 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 00:55:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:58,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:55:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:58,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790415154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:55:58,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:55:58,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-07 00:55:58,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193423265] [2021-12-07 00:55:58,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:55:58,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 00:55:58,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:58,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 00:55:58,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:55:58,936 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 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) [2021-12-07 00:55:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:59,052 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2021-12-07 00:55:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:55:59,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-07 00:55:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:59,053 INFO L225 Difference]: With dead ends: 130 [2021-12-07 00:55:59,053 INFO L226 Difference]: Without dead ends: 130 [2021-12-07 00:55:59,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:55:59,054 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 337 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:59,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 291 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:55:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-07 00:55:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 59. [2021-12-07 00:55:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 58 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) [2021-12-07 00:55:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-12-07 00:55:59,059 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 13 [2021-12-07 00:55:59,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:59,060 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-12-07 00:55:59,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 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) [2021-12-07 00:55:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-12-07 00:55:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 00:55:59,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:59,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:59,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-07 00:55:59,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:55:59,263 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:59,265 INFO L85 PathProgramCache]: Analyzing trace with hash 172810813, now seen corresponding path program 1 times [2021-12-07 00:55:59,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:59,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801832577] [2021-12-07 00:55:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:59,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:59,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:59,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801832577] [2021-12-07 00:55:59,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801832577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:59,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:59,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:55:59,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854957364] [2021-12-07 00:55:59,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:59,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:55:59,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:55:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:55:59,451 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2021-12-07 00:55:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:59,477 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-12-07 00:55:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:55:59,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 [2021-12-07 00:55:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:59,478 INFO L225 Difference]: With dead ends: 58 [2021-12-07 00:55:59,478 INFO L226 Difference]: Without dead ends: 53 [2021-12-07 00:55:59,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:55:59,479 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 49 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:59,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 80 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-07 00:55:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-07 00:55:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-07 00:55:59,482 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 14 [2021-12-07 00:55:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:59,482 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-07 00:55:59,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2021-12-07 00:55:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-07 00:55:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-07 00:55:59,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:59,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:59,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-07 00:55:59,483 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:59,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1062175016, now seen corresponding path program 1 times [2021-12-07 00:55:59,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:59,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952948827] [2021-12-07 00:55:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:59,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:59,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:59,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952948827] [2021-12-07 00:55:59,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952948827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:59,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:59,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:59,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948613864] [2021-12-07 00:55:59,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:59,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:55:59,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:59,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:55:59,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:55:59,507 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:59,528 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-07 00:55:59,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:55:59,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-07 00:55:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:59,529 INFO L225 Difference]: With dead ends: 50 [2021-12-07 00:55:59,529 INFO L226 Difference]: Without dead ends: 50 [2021-12-07 00:55:59,529 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 [2021-12-07 00:55:59,530 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:59,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 46 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-07 00:55:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-07 00:55:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-12-07 00:55:59,532 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 15 [2021-12-07 00:55:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:59,532 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-12-07 00:55:59,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-12-07 00:55:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-07 00:55:59,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:59,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:59,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 00:55:59,533 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:59,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:59,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1062175017, now seen corresponding path program 1 times [2021-12-07 00:55:59,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:59,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869287355] [2021-12-07 00:55:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:59,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:59,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869287355] [2021-12-07 00:55:59,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869287355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:59,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:59,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:55:59,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135281878] [2021-12-07 00:55:59,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:59,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:55:59,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:59,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:55:59,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:55:59,583 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:59,624 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-12-07 00:55:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:55:59,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-07 00:55:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:59,625 INFO L225 Difference]: With dead ends: 67 [2021-12-07 00:55:59,625 INFO L226 Difference]: Without dead ends: 67 [2021-12-07 00:55:59,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:55:59,625 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 178 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:59,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 59 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-07 00:55:59,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-12-07 00:55:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-12-07 00:55:59,628 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 15 [2021-12-07 00:55:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:59,628 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-12-07 00:55:59,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,629 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-12-07 00:55:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-07 00:55:59,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:59,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:59,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 00:55:59,630 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:59,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1432312828, now seen corresponding path program 1 times [2021-12-07 00:55:59,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:59,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149246219] [2021-12-07 00:55:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:59,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:59,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:59,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149246219] [2021-12-07 00:55:59,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149246219] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:59,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:59,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:59,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538445369] [2021-12-07 00:55:59,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:59,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:55:59,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:55:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:55:59,657 INFO L87 Difference]: Start difference. First operand 59 states and 72 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) [2021-12-07 00:55:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:59,677 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-12-07 00:55:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:55:59,678 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 [2021-12-07 00:55:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:59,678 INFO L225 Difference]: With dead ends: 57 [2021-12-07 00:55:59,678 INFO L226 Difference]: Without dead ends: 57 [2021-12-07 00:55:59,679 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 [2021-12-07 00:55:59,679 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:59,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-07 00:55:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-07 00:55:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-12-07 00:55:59,682 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 16 [2021-12-07 00:55:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:59,682 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-12-07 00:55:59,683 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) [2021-12-07 00:55:59,683 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-12-07 00:55:59,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-07 00:55:59,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:59,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:59,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 00:55:59,684 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1432312827, now seen corresponding path program 1 times [2021-12-07 00:55:59,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:59,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184444649] [2021-12-07 00:55:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:59,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:59,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:59,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184444649] [2021-12-07 00:55:59,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184444649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:59,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:59,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:55:59,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59135050] [2021-12-07 00:55:59,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:59,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:55:59,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:59,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:55:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:55:59,727 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2021-12-07 00:55:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:59,763 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-12-07 00:55:59,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:55:59,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 [2021-12-07 00:55:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:59,764 INFO L225 Difference]: With dead ends: 61 [2021-12-07 00:55:59,764 INFO L226 Difference]: Without dead ends: 58 [2021-12-07 00:55:59,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:55:59,765 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 105 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:59,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 55 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-07 00:55:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-12-07 00:55:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 55 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) [2021-12-07 00:55:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-12-07 00:55:59,768 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 16 [2021-12-07 00:55:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:59,768 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-12-07 00:55:59,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2021-12-07 00:55:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-12-07 00:55:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-07 00:55:59,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:59,769 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:59,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 00:55:59,770 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:59,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:59,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1455987438, now seen corresponding path program 1 times [2021-12-07 00:55:59,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:59,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569030995] [2021-12-07 00:55:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:59,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:59,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:59,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569030995] [2021-12-07 00:55:59,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569030995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:59,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:59,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:59,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327132665] [2021-12-07 00:55:59,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:59,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:59,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:59,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:59,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:59,793 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:59,799 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-12-07 00:55:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:59,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-07 00:55:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:59,800 INFO L225 Difference]: With dead ends: 58 [2021-12-07 00:55:59,800 INFO L226 Difference]: Without dead ends: 57 [2021-12-07 00:55:59,800 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 [2021-12-07 00:55:59,801 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 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 [2021-12-07 00:55:59,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-07 00:55:59,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-07 00:55:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 56 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) [2021-12-07 00:55:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-12-07 00:55:59,804 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 20 [2021-12-07 00:55:59,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:59,804 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-12-07 00:55:59,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,804 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-12-07 00:55:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-07 00:55:59,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:59,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:59,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-07 00:55:59,805 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:59,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:59,806 INFO L85 PathProgramCache]: Analyzing trace with hash 420786095, now seen corresponding path program 1 times [2021-12-07 00:55:59,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:59,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56632996] [2021-12-07 00:55:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:59,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:59,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:59,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56632996] [2021-12-07 00:55:59,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56632996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:59,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:59,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:59,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375633798] [2021-12-07 00:55:59,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:59,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:59,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:59,831 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:59,836 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-12-07 00:55:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:59,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-07 00:55:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:59,837 INFO L225 Difference]: With dead ends: 58 [2021-12-07 00:55:59,837 INFO L226 Difference]: Without dead ends: 57 [2021-12-07 00:55:59,837 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 [2021-12-07 00:55:59,838 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:59,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-07 00:55:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-07 00:55:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-12-07 00:55:59,842 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 23 [2021-12-07 00:55:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:59,842 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-12-07 00:55:59,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-12-07 00:55:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:55:59,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:59,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:59,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 00:55:59,843 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:55:59,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:59,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2103285548, now seen corresponding path program 1 times [2021-12-07 00:55:59,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:59,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630011427] [2021-12-07 00:55:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:59,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:59,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:59,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630011427] [2021-12-07 00:55:59,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630011427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:59,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:59,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:55:59,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361337407] [2021-12-07 00:55:59,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:59,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:55:59,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:55:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:55:59,939 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:00,011 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-12-07 00:56:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:56:00,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-07 00:56:00,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:00,012 INFO L225 Difference]: With dead ends: 78 [2021-12-07 00:56:00,012 INFO L226 Difference]: Without dead ends: 52 [2021-12-07 00:56:00,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:56:00,013 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:00,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 208 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:56:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-07 00:56:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-07 00:56:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-12-07 00:56:00,033 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 25 [2021-12-07 00:56:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:00,034 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-12-07 00:56:00,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-12-07 00:56:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:56:00,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:00,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:00,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-07 00:56:00,035 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:00,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:00,035 INFO L85 PathProgramCache]: Analyzing trace with hash 386243414, now seen corresponding path program 1 times [2021-12-07 00:56:00,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:00,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236525309] [2021-12-07 00:56:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:00,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:00,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:00,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236525309] [2021-12-07 00:56:00,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236525309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:00,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:00,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-07 00:56:00,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981023786] [2021-12-07 00:56:00,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:00,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:56:00,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:00,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:56:00,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:56:00,132 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:00,257 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-12-07 00:56:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:56:00,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-07 00:56:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:00,258 INFO L225 Difference]: With dead ends: 81 [2021-12-07 00:56:00,258 INFO L226 Difference]: Without dead ends: 60 [2021-12-07 00:56:00,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:56:00,259 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:00,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 184 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:56:00,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-07 00:56:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-12-07 00:56:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-12-07 00:56:00,262 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 25 [2021-12-07 00:56:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:00,262 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-12-07 00:56:00,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-12-07 00:56:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 00:56:00,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:00,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:00,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-07 00:56:00,263 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:00,263 INFO L85 PathProgramCache]: Analyzing trace with hash 235047385, now seen corresponding path program 1 times [2021-12-07 00:56:00,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:00,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389493157] [2021-12-07 00:56:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:00,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:00,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:00,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389493157] [2021-12-07 00:56:00,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389493157] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:00,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626077636] [2021-12-07 00:56:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:00,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:00,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:00,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:00,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:56:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:00,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-07 00:56:00,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:00,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:00,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 00:56:00,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:56:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:00,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:00,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626077636] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:00,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:00,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2021-12-07 00:56:00,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273182473] [2021-12-07 00:56:00,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:00,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 00:56:00,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:00,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 00:56:00,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:56:00,641 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:00,783 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2021-12-07 00:56:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:56:00,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-07 00:56:00,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:00,783 INFO L225 Difference]: With dead ends: 78 [2021-12-07 00:56:00,783 INFO L226 Difference]: Without dead ends: 78 [2021-12-07 00:56:00,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:56:00,784 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 224 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:00,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 158 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:00,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-07 00:56:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-12-07 00:56:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 59 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) [2021-12-07 00:56:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-12-07 00:56:00,786 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 29 [2021-12-07 00:56:00,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:00,786 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-12-07 00:56:00,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-12-07 00:56:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 00:56:00,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:00,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:00,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:56:00,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:00,989 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:00,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:00,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1303465643, now seen corresponding path program 1 times [2021-12-07 00:56:00,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:00,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472933468] [2021-12-07 00:56:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:00,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:56:01,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:01,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472933468] [2021-12-07 00:56:01,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472933468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:01,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:01,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-07 00:56:01,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884260258] [2021-12-07 00:56:01,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:01,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:56:01,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:01,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:56:01,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:56:01,118 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2021-12-07 00:56:01,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:01,222 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-12-07 00:56:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:56:01,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-07 00:56:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:01,223 INFO L225 Difference]: With dead ends: 74 [2021-12-07 00:56:01,223 INFO L226 Difference]: Without dead ends: 52 [2021-12-07 00:56:01,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:56:01,224 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:01,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 207 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:56:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-07 00:56:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-07 00:56:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 51 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) [2021-12-07 00:56:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-12-07 00:56:01,226 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 30 [2021-12-07 00:56:01,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:01,226 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-12-07 00:56:01,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2021-12-07 00:56:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-12-07 00:56:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 00:56:01,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:01,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:01,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-07 00:56:01,226 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:01,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:01,227 INFO L85 PathProgramCache]: Analyzing trace with hash 619762391, now seen corresponding path program 1 times [2021-12-07 00:56:01,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:01,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794564121] [2021-12-07 00:56:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:01,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:56:01,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:01,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794564121] [2021-12-07 00:56:01,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794564121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:01,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:01,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-07 00:56:01,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662463414] [2021-12-07 00:56:01,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:01,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:56:01,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:01,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:56:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:56:01,352 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2021-12-07 00:56:01,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:01,518 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-12-07 00:56:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 00:56:01,518 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-07 00:56:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:01,518 INFO L225 Difference]: With dead ends: 70 [2021-12-07 00:56:01,519 INFO L226 Difference]: Without dead ends: 56 [2021-12-07 00:56:01,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:56:01,519 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:01,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 238 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-07 00:56:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-12-07 00:56:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.163265306122449) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-12-07 00:56:01,521 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 30 [2021-12-07 00:56:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:01,521 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-12-07 00:56:01,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2021-12-07 00:56:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-12-07 00:56:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-07 00:56:01,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:01,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:01,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-07 00:56:01,522 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:01,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:01,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1945235956, now seen corresponding path program 1 times [2021-12-07 00:56:01,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:01,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390714160] [2021-12-07 00:56:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:01,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:56:01,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:01,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390714160] [2021-12-07 00:56:01,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390714160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:01,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824527488] [2021-12-07 00:56:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:01,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:01,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:01,613 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:01,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:56:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:01,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:56:01,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:56:01,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:01,841 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 [2021-12-07 00:56:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:56:01,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824527488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:01,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:01,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2021-12-07 00:56:01,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178178970] [2021-12-07 00:56:01,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:01,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 00:56:01,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 00:56:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-07 00:56:01,863 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:01,949 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-12-07 00:56:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:56:01,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 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 [2021-12-07 00:56:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:01,950 INFO L225 Difference]: With dead ends: 68 [2021-12-07 00:56:01,950 INFO L226 Difference]: Without dead ends: 61 [2021-12-07 00:56:01,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:56:01,951 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 278 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:01,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 137 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-07 00:56:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2021-12-07 00:56:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.125) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-12-07 00:56:01,954 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 34 [2021-12-07 00:56:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:01,954 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-12-07 00:56:01,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-12-07 00:56:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 00:56:01,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:01,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:01,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:56:02,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:02,157 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:02,157 INFO L85 PathProgramCache]: Analyzing trace with hash -871868475, now seen corresponding path program 1 times [2021-12-07 00:56:02,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:02,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424276505] [2021-12-07 00:56:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:02,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:56:02,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:02,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424276505] [2021-12-07 00:56:02,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424276505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:02,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343716188] [2021-12-07 00:56:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:02,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:02,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:02,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:02,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:56:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:02,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 00:56:02,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:02,394 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 14 treesize of output 10 [2021-12-07 00:56:02,749 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 [2021-12-07 00:56:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:56:02,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:02,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:56:02,970 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 91 treesize of output 91 [2021-12-07 00:56:03,024 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 36 treesize of output 32 [2021-12-07 00:56:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:56:03,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343716188] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:03,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:03,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 29 [2021-12-07 00:56:03,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090919757] [2021-12-07 00:56:03,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:03,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-07 00:56:03,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:03,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-07 00:56:03,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-12-07 00:56:03,116 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:03,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:03,556 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2021-12-07 00:56:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-07 00:56:03,556 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 0 states have call successors, (0), 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 43 [2021-12-07 00:56:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:03,557 INFO L225 Difference]: With dead ends: 143 [2021-12-07 00:56:03,557 INFO L226 Difference]: Without dead ends: 66 [2021-12-07 00:56:03,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:56:03,558 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 72 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:03,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 464 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 288 Invalid, 0 Unknown, 177 Unchecked, 0.1s Time] [2021-12-07 00:56:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-07 00:56:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-12-07 00:56:03,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:03,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-12-07 00:56:03,561 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 43 [2021-12-07 00:56:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:03,561 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-12-07 00:56:03,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-12-07 00:56:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-07 00:56:03,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:03,562 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:03,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:56:03,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-07 00:56:03,763 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:03,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:03,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1808120587, now seen corresponding path program 2 times [2021-12-07 00:56:03,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:03,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391147541] [2021-12-07 00:56:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:03,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:56:03,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:03,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391147541] [2021-12-07 00:56:03,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391147541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:03,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142692827] [2021-12-07 00:56:03,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:56:03,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:03,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:03,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:03,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:56:03,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:56:03,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:03,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:56:03,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:56:04,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:04,222 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 5 treesize of output 3 [2021-12-07 00:56:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:56:04,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142692827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:04,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:04,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-07 00:56:04,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185914819] [2021-12-07 00:56:04,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:04,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 00:56:04,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 00:56:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:56:04,254 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 20 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) [2021-12-07 00:56:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:04,376 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-12-07 00:56:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:56:04,376 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 20 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 51 [2021-12-07 00:56:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:04,377 INFO L225 Difference]: With dead ends: 82 [2021-12-07 00:56:04,377 INFO L226 Difference]: Without dead ends: 82 [2021-12-07 00:56:04,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-12-07 00:56:04,378 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 350 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:04,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 192 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-07 00:56:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2021-12-07 00:56:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-12-07 00:56:04,380 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 51 [2021-12-07 00:56:04,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:04,380 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-12-07 00:56:04,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 20 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) [2021-12-07 00:56:04,380 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-12-07 00:56:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-07 00:56:04,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:04,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:04,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:56:04,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-07 00:56:04,582 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:04,583 INFO L85 PathProgramCache]: Analyzing trace with hash 217163363, now seen corresponding path program 2 times [2021-12-07 00:56:04,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:04,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651445750] [2021-12-07 00:56:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:04,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:56:04,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:04,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651445750] [2021-12-07 00:56:04,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651445750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:04,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766241948] [2021-12-07 00:56:04,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:56:04,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:04,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:04,702 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:04,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:56:04,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:56:04,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:04,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:56:04,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:56:04,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:05,014 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 [2021-12-07 00:56:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:56:05,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766241948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:05,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:05,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-07 00:56:05,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436937276] [2021-12-07 00:56:05,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:05,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 00:56:05,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:05,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 00:56:05,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:56:05,041 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 20 states, 19 states have (on average 5.526315789473684) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:05,225 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-12-07 00:56:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:56:05,226 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.526315789473684) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 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 52 [2021-12-07 00:56:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:05,226 INFO L225 Difference]: With dead ends: 80 [2021-12-07 00:56:05,226 INFO L226 Difference]: Without dead ends: 76 [2021-12-07 00:56:05,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-12-07 00:56:05,227 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 471 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:05,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 264 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:05,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-07 00:56:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-12-07 00:56:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-12-07 00:56:05,229 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 52 [2021-12-07 00:56:05,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:05,229 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-12-07 00:56:05,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.526315789473684) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-12-07 00:56:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-07 00:56:05,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:05,230 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:05,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:56:05,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 00:56:05,430 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1900752950, now seen corresponding path program 3 times [2021-12-07 00:56:05,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:05,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963708635] [2021-12-07 00:56:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:05,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:56:05,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:05,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963708635] [2021-12-07 00:56:05,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963708635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:05,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091402147] [2021-12-07 00:56:05,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:56:05,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:05,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:05,557 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:05,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:56:05,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 00:56:05,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:05,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 00:56:05,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:05,718 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 14 treesize of output 10 [2021-12-07 00:56:06,127 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 [2021-12-07 00:56:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:56:06,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:06,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:56:06,446 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 91 treesize of output 91 [2021-12-07 00:56:06,485 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 36 treesize of output 32 [2021-12-07 00:56:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:56:06,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091402147] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:06,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:06,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 34 [2021-12-07 00:56:06,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192899784] [2021-12-07 00:56:06,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:06,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 00:56:06,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:06,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 00:56:06,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 00:56:06,589 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 34 states, 34 states have (on average 4.029411764705882) internal successors, (137), 34 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:07,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:07,232 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2021-12-07 00:56:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-07 00:56:07,232 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.029411764705882) internal successors, (137), 34 states have internal predecessors, (137), 0 states have call successors, (0), 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 61 [2021-12-07 00:56:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:07,232 INFO L225 Difference]: With dead ends: 195 [2021-12-07 00:56:07,233 INFO L226 Difference]: Without dead ends: 84 [2021-12-07 00:56:07,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=274, Invalid=2918, Unknown=0, NotChecked=0, Total=3192 [2021-12-07 00:56:07,234 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 100 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:07,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 654 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 396 Invalid, 0 Unknown, 266 Unchecked, 0.1s Time] [2021-12-07 00:56:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-07 00:56:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-12-07 00:56:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-12-07 00:56:07,237 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 61 [2021-12-07 00:56:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:07,237 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-12-07 00:56:07,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.029411764705882) internal successors, (137), 34 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-12-07 00:56:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-07 00:56:07,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:07,238 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:07,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:56:07,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 00:56:07,440 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:07,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1604309508, now seen corresponding path program 4 times [2021-12-07 00:56:07,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:07,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463680169] [2021-12-07 00:56:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:07,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:56:07,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:07,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463680169] [2021-12-07 00:56:07,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463680169] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:07,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366374349] [2021-12-07 00:56:07,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:56:07,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:07,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:07,561 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:07,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:56:07,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:56:07,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:07,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 00:56:07,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:07,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:07,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 00:56:07,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:56:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:56:07,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:56:08,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366374349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:08,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:08,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2021-12-07 00:56:08,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909309929] [2021-12-07 00:56:08,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:08,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-07 00:56:08,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:08,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-07 00:56:08,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-12-07 00:56:08,208 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 28 states, 27 states have (on average 6.2592592592592595) internal successors, (169), 28 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:08,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:08,444 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-12-07 00:56:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:56:08,445 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 6.2592592592592595) internal successors, (169), 28 states have internal predecessors, (169), 0 states have call successors, (0), 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 69 [2021-12-07 00:56:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:08,445 INFO L225 Difference]: With dead ends: 100 [2021-12-07 00:56:08,445 INFO L226 Difference]: Without dead ends: 100 [2021-12-07 00:56:08,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:56:08,446 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 473 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:08,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 390 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-07 00:56:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2021-12-07 00:56:08,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 88 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) [2021-12-07 00:56:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-12-07 00:56:08,448 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 69 [2021-12-07 00:56:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:08,448 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-12-07 00:56:08,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 6.2592592592592595) internal successors, (169), 28 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-12-07 00:56:08,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 00:56:08,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:08,449 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:08,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-07 00:56:08,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 00:56:08,650 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:08,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1806012818, now seen corresponding path program 3 times [2021-12-07 00:56:08,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:08,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83561988] [2021-12-07 00:56:08,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:08,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:56:08,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:08,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83561988] [2021-12-07 00:56:08,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83561988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:08,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067998617] [2021-12-07 00:56:08,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:56:08,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:08,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:08,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:08,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:56:08,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 00:56:08,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:08,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 00:56:08,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:08,883 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:56:08,883 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 00:56:08,975 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 15 treesize of output 11 [2021-12-07 00:56:09,150 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-12-07 00:56:09,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-12-07 00:56:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-07 00:56:09,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:09,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:56:09,976 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 87 treesize of output 87 [2021-12-07 00:56:09,995 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 30 treesize of output 28 [2021-12-07 00:56:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-07 00:56:10,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067998617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:10,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:10,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2021-12-07 00:56:10,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240843931] [2021-12-07 00:56:10,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:10,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 00:56:10,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 00:56:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-12-07 00:56:10,231 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 31 states, 30 states have (on average 4.6) internal successors, (138), 31 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:11,029 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-12-07 00:56:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-07 00:56:11,029 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.6) internal successors, (138), 31 states have internal predecessors, (138), 0 states have call successors, (0), 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 70 [2021-12-07 00:56:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:11,030 INFO L225 Difference]: With dead ends: 87 [2021-12-07 00:56:11,030 INFO L226 Difference]: Without dead ends: 83 [2021-12-07 00:56:11,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=740, Invalid=2682, Unknown=0, NotChecked=0, Total=3422 [2021-12-07 00:56:11,031 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 445 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:11,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 326 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 405 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2021-12-07 00:56:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-07 00:56:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-07 00:56:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2021-12-07 00:56:11,034 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 70 [2021-12-07 00:56:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:11,034 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2021-12-07 00:56:11,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.6) internal successors, (138), 31 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:11,035 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2021-12-07 00:56:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-07 00:56:11,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:11,035 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:11,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-07 00:56:11,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-07 00:56:11,237 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:11,239 INFO L85 PathProgramCache]: Analyzing trace with hash 810248679, now seen corresponding path program 5 times [2021-12-07 00:56:11,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:11,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597284831] [2021-12-07 00:56:11,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:11,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:56:11,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:11,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597284831] [2021-12-07 00:56:11,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597284831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:11,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003192155] [2021-12-07 00:56:11,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:56:11,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:11,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:11,440 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:11,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:56:11,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-07 00:56:11,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-07 00:56:11,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:11,607 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 14 treesize of output 10 [2021-12-07 00:56:12,103 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 [2021-12-07 00:56:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:56:12,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:12,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:56:12,481 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 91 treesize of output 91 [2021-12-07 00:56:12,518 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 36 treesize of output 32 [2021-12-07 00:56:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:56:12,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003192155] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:12,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:12,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 39 [2021-12-07 00:56:12,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432040413] [2021-12-07 00:56:12,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:12,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-07 00:56:12,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-07 00:56:12,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1380, Unknown=0, NotChecked=0, Total=1482 [2021-12-07 00:56:12,623 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:13,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:13,482 INFO L93 Difference]: Finished difference Result 242 states and 247 transitions. [2021-12-07 00:56:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-07 00:56:13,482 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 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 79 [2021-12-07 00:56:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:13,483 INFO L225 Difference]: With dead ends: 242 [2021-12-07 00:56:13,483 INFO L226 Difference]: Without dead ends: 97 [2021-12-07 00:56:13,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=302, Invalid=3858, Unknown=0, NotChecked=0, Total=4160 [2021-12-07 00:56:13,484 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 99 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:13,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 919 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 614 Invalid, 0 Unknown, 332 Unchecked, 0.2s Time] [2021-12-07 00:56:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-07 00:56:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2021-12-07 00:56:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 90 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2021-12-07 00:56:13,486 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 79 [2021-12-07 00:56:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:13,486 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2021-12-07 00:56:13,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2021-12-07 00:56:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 00:56:13,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:13,487 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:13,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:56:13,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:13,688 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:13,690 INFO L85 PathProgramCache]: Analyzing trace with hash 136208941, now seen corresponding path program 6 times [2021-12-07 00:56:13,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:13,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468221956] [2021-12-07 00:56:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:13,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:56:13,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:13,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468221956] [2021-12-07 00:56:13,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468221956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:13,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442506116] [2021-12-07 00:56:13,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:56:13,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:13,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:13,854 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:13,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:56:13,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-07 00:56:13,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:13,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 00:56:13,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:13,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:56:13,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 00:56:13,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:56:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:56:14,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:56:14,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442506116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:14,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:14,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2021-12-07 00:56:14,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484585500] [2021-12-07 00:56:14,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:14,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:56:14,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:14,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:56:14,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 00:56:14,645 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 35 states, 34 states have (on average 6.382352941176471) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:14,958 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-12-07 00:56:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:56:14,958 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 6.382352941176471) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 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 87 [2021-12-07 00:56:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:14,959 INFO L225 Difference]: With dead ends: 110 [2021-12-07 00:56:14,959 INFO L226 Difference]: Without dead ends: 108 [2021-12-07 00:56:14,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=391, Invalid=1679, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:56:14,960 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 686 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:14,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 328 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:14,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-07 00:56:14,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-12-07 00:56:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-12-07 00:56:14,962 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 87 [2021-12-07 00:56:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:14,962 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-12-07 00:56:14,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 6.382352941176471) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-12-07 00:56:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-07 00:56:14,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:14,963 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:14,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:56:15,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-07 00:56:15,164 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1990120664, now seen corresponding path program 7 times [2021-12-07 00:56:15,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:15,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611414182] [2021-12-07 00:56:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:15,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:56:15,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611414182] [2021-12-07 00:56:15,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611414182] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419450554] [2021-12-07 00:56:15,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:56:15,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:15,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:15,384 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:15,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:56:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:15,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-07 00:56:15,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:15,638 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 14 treesize of output 10 [2021-12-07 00:56:16,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:56:16,929 INFO L354 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2021-12-07 00:56:16,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2021-12-07 00:56:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:56:16,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:18,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:56:18,489 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 91 treesize of output 91 [2021-12-07 00:56:18,498 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 36 treesize of output 32 [2021-12-07 00:56:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:56:18,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419450554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:18,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:18,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 53 [2021-12-07 00:56:18,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9137057] [2021-12-07 00:56:18,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:18,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-07 00:56:18,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-07 00:56:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2601, Unknown=0, NotChecked=0, Total=2756 [2021-12-07 00:56:18,875 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:20,148 INFO L93 Difference]: Finished difference Result 296 states and 301 transitions. [2021-12-07 00:56:20,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-07 00:56:20,148 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 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 97 [2021-12-07 00:56:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:20,149 INFO L225 Difference]: With dead ends: 296 [2021-12-07 00:56:20,149 INFO L226 Difference]: Without dead ends: 115 [2021-12-07 00:56:20,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=490, Invalid=7520, Unknown=0, NotChecked=0, Total=8010 [2021-12-07 00:56:20,152 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 136 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 628 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:20,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1793 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 889 Invalid, 0 Unknown, 628 Unchecked, 0.2s Time] [2021-12-07 00:56:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-07 00:56:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2021-12-07 00:56:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2021-12-07 00:56:20,154 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 97 [2021-12-07 00:56:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:20,154 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2021-12-07 00:56:20,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2021-12-07 00:56:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-07 00:56:20,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:20,155 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:20,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:56:20,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:20,356 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2118244450, now seen corresponding path program 8 times [2021-12-07 00:56:20,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:20,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286798593] [2021-12-07 00:56:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:20,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 00:56:20,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:20,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286798593] [2021-12-07 00:56:20,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286798593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:20,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689379521] [2021-12-07 00:56:20,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:56:20,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:20,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:20,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:20,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:56:20,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:56:20,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:20,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-07 00:56:20,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 00:56:20,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:21,160 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 [2021-12-07 00:56:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 00:56:21,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689379521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:21,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:21,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2021-12-07 00:56:21,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335832557] [2021-12-07 00:56:21,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:21,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 00:56:21,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:21,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 00:56:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-12-07 00:56:21,217 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 32 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:21,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:21,453 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-12-07 00:56:21,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 00:56:21,454 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 32 states have internal predecessors, (188), 0 states have call successors, (0), 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 105 [2021-12-07 00:56:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:21,454 INFO L225 Difference]: With dead ends: 128 [2021-12-07 00:56:21,454 INFO L226 Difference]: Without dead ends: 126 [2021-12-07 00:56:21,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 00:56:21,455 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 438 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:21,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 505 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-07 00:56:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2021-12-07 00:56:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 118 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) [2021-12-07 00:56:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-12-07 00:56:21,458 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 105 [2021-12-07 00:56:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:21,458 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-12-07 00:56:21,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 32 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-12-07 00:56:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-07 00:56:21,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:21,459 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:21,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-07 00:56:21,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-07 00:56:21,661 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1811890441, now seen corresponding path program 9 times [2021-12-07 00:56:21,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:21,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603847303] [2021-12-07 00:56:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:21,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 00:56:21,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:21,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603847303] [2021-12-07 00:56:21,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603847303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:21,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033489205] [2021-12-07 00:56:21,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:56:21,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:21,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:21,932 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:21,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:56:22,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-07 00:56:22,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:22,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-07 00:56:22,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:22,479 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 14 treesize of output 10 [2021-12-07 00:56:23,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:56:23,280 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-07 00:56:23,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2021-12-07 00:56:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:56:23,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:55,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:56:55,328 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 103 treesize of output 103 [2021-12-07 00:56:55,343 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 40 treesize of output 36 [2021-12-07 00:56:55,360 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 3 [2021-12-07 00:56:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 00:56:55,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033489205] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:55,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:55,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 23] total 61 [2021-12-07 00:56:55,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537739722] [2021-12-07 00:56:55,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:55,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-07 00:56:55,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:55,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-07 00:56:55,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3440, Unknown=51, NotChecked=0, Total=3660 [2021-12-07 00:56:55,650 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 61 states, 61 states have (on average 4.80327868852459) internal successors, (293), 61 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:57,246 INFO L93 Difference]: Finished difference Result 348 states and 353 transitions. [2021-12-07 00:56:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-07 00:56:57,246 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.80327868852459) internal successors, (293), 61 states have internal predecessors, (293), 0 states have call successors, (0), 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 115 [2021-12-07 00:56:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:57,247 INFO L225 Difference]: With dead ends: 348 [2021-12-07 00:56:57,247 INFO L226 Difference]: Without dead ends: 133 [2021-12-07 00:56:57,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=545, Invalid=9910, Unknown=51, NotChecked=0, Total=10506 [2021-12-07 00:56:57,250 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 164 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 2144 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1045 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:57,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 2144 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1339 Invalid, 0 Unknown, 1045 Unchecked, 0.4s Time] [2021-12-07 00:56:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-07 00:56:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2021-12-07 00:56:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 1.032) internal successors, (129), 126 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-12-07 00:56:57,253 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 115 [2021-12-07 00:56:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:57,253 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-12-07 00:56:57,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.80327868852459) internal successors, (293), 61 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-12-07 00:56:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-07 00:56:57,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:57,254 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:57,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:56:57,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-07 00:56:57,455 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:57,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:57,457 INFO L85 PathProgramCache]: Analyzing trace with hash 740380239, now seen corresponding path program 10 times [2021-12-07 00:56:57,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:57,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446583555] [2021-12-07 00:56:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:57,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 28 proven. 206 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 00:56:57,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:57,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446583555] [2021-12-07 00:56:57,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446583555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:57,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689040707] [2021-12-07 00:56:57,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:56:57,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:57,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:57,664 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:57,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:56:57,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:56:57,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:57,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-07 00:56:57,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 45 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 00:56:58,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:58,352 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 [2021-12-07 00:56:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 45 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 00:56:58,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689040707] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:58,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:58,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2021-12-07 00:56:58,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190659729] [2021-12-07 00:56:58,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:58,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-07 00:56:58,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:58,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-07 00:56:58,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-12-07 00:56:58,411 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 36 states, 35 states have (on average 6.171428571428572) internal successors, (216), 36 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) [2021-12-07 00:56:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:58,715 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2021-12-07 00:56:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 00:56:58,715 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 6.171428571428572) internal successors, (216), 36 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 123 [2021-12-07 00:56:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:58,717 INFO L225 Difference]: With dead ends: 146 [2021-12-07 00:56:58,717 INFO L226 Difference]: Without dead ends: 144 [2021-12-07 00:56:58,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1668, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:56:58,718 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 603 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:58,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 649 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:56:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-07 00:56:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2021-12-07 00:56:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 136 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2021-12-07 00:56:58,722 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 123 [2021-12-07 00:56:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:58,722 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2021-12-07 00:56:58,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 6.171428571428572) internal successors, (216), 36 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) [2021-12-07 00:56:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2021-12-07 00:56:58,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-07 00:56:58,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:58,723 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:58,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 00:56:58,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:58,924 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:56:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:58,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1689616774, now seen corresponding path program 11 times [2021-12-07 00:56:58,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:58,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718697351] [2021-12-07 00:56:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:58,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 00:56:59,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718697351] [2021-12-07 00:56:59,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718697351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050349549] [2021-12-07 00:56:59,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:56:59,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:59,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:59,230 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:59,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 00:56:59,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-07 00:56:59,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:59,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-07 00:56:59,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:59,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:56:59,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 00:56:59,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 00:57:00,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:57:00,987 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 18 treesize of output 18 [2021-12-07 00:57:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 45 proven. 244 refuted. 8 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 00:57:01,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:01,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:57:01,775 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 00:57:01,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:57:01,779 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 37 treesize of output 37 [2021-12-07 00:57:01,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:57:01,791 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 [2021-12-07 00:57:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 45 proven. 252 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 00:57:02,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050349549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:02,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:02,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 20] total 58 [2021-12-07 00:57:02,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707371123] [2021-12-07 00:57:02,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:02,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-07 00:57:02,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:02,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-07 00:57:02,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=3025, Unknown=1, NotChecked=0, Total=3306 [2021-12-07 00:57:02,405 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 58 states, 58 states have (on average 5.706896551724138) internal successors, (331), 58 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) [2021-12-07 00:57:04,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:04,431 INFO L93 Difference]: Finished difference Result 263 states and 266 transitions. [2021-12-07 00:57:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-07 00:57:04,431 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.706896551724138) internal successors, (331), 58 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 133 [2021-12-07 00:57:04,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:04,432 INFO L225 Difference]: With dead ends: 263 [2021-12-07 00:57:04,432 INFO L226 Difference]: Without dead ends: 161 [2021-12-07 00:57:04,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=507, Invalid=5042, Unknown=1, NotChecked=0, Total=5550 [2021-12-07 00:57:04,433 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 302 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:04,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 1611 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 764 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2021-12-07 00:57:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-07 00:57:04,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 151. [2021-12-07 00:57:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 150 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-12-07 00:57:04,435 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 133 [2021-12-07 00:57:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:04,436 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-12-07 00:57:04,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 5.706896551724138) internal successors, (331), 58 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) [2021-12-07 00:57:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-12-07 00:57:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-07 00:57:04,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:04,436 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:04,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-07 00:57:04,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:04,638 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:57:04,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:04,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1541708840, now seen corresponding path program 12 times [2021-12-07 00:57:04,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:04,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627075042] [2021-12-07 00:57:04,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:04,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 240 proven. 130 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 00:57:04,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:04,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627075042] [2021-12-07 00:57:04,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627075042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:04,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848618060] [2021-12-07 00:57:04,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:57:04,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:04,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:04,850 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:04,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 00:57:05,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-07 00:57:05,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:57:05,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-07 00:57:05,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:05,288 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:57:05,288 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 00:57:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 304 proven. 66 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 00:57:05,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 304 proven. 66 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 00:57:06,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848618060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:06,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:06,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 47 [2021-12-07 00:57:06,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921584203] [2021-12-07 00:57:06,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:06,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-07 00:57:06,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:06,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-07 00:57:06,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=1752, Unknown=0, NotChecked=0, Total=2162 [2021-12-07 00:57:06,065 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 47 states, 47 states have (on average 5.9361702127659575) internal successors, (279), 47 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:06,293 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2021-12-07 00:57:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-07 00:57:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 5.9361702127659575) internal successors, (279), 47 states have internal predecessors, (279), 0 states have call successors, (0), 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 147 [2021-12-07 00:57:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:06,295 INFO L225 Difference]: With dead ends: 236 [2021-12-07 00:57:06,295 INFO L226 Difference]: Without dead ends: 158 [2021-12-07 00:57:06,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-12-07 00:57:06,295 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 219 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:06,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 447 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-07 00:57:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 155. [2021-12-07 00:57:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.026143790849673) internal successors, (157), 154 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2021-12-07 00:57:06,298 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 147 [2021-12-07 00:57:06,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:06,298 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2021-12-07 00:57:06,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 5.9361702127659575) internal successors, (279), 47 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2021-12-07 00:57:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-07 00:57:06,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:06,299 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:06,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 00:57:06,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-07 00:57:06,499 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:57:06,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:06,500 INFO L85 PathProgramCache]: Analyzing trace with hash -612213461, now seen corresponding path program 13 times [2021-12-07 00:57:06,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:06,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387199808] [2021-12-07 00:57:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:06,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 00:57:06,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:06,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387199808] [2021-12-07 00:57:06,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387199808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:06,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001548135] [2021-12-07 00:57:06,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:57:06,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:06,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:06,779 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:06,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 00:57:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-07 00:57:06,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:07,064 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 14 treesize of output 10 [2021-12-07 00:57:07,986 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 [2021-12-07 00:57:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 00:57:07,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:08,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:57:08,878 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 91 treesize of output 91 [2021-12-07 00:57:08,913 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 36 treesize of output 32 [2021-12-07 00:57:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 00:57:09,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001548135] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:09,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:09,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 59 [2021-12-07 00:57:09,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967526692] [2021-12-07 00:57:09,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:09,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-07 00:57:09,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-07 00:57:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3272, Unknown=0, NotChecked=0, Total=3422 [2021-12-07 00:57:09,087 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 59 states, 59 states have (on average 5.5423728813559325) internal successors, (327), 59 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:11,192 INFO L93 Difference]: Finished difference Result 450 states and 455 transitions. [2021-12-07 00:57:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-07 00:57:11,192 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 5.5423728813559325) internal successors, (327), 59 states have internal predecessors, (327), 0 states have call successors, (0), 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 151 [2021-12-07 00:57:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:11,193 INFO L225 Difference]: With dead ends: 450 [2021-12-07 00:57:11,193 INFO L226 Difference]: Without dead ends: 169 [2021-12-07 00:57:11,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 266 SyntacticMatches, 11 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=450, Invalid=9650, Unknown=0, NotChecked=0, Total=10100 [2021-12-07 00:57:11,194 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 126 mSDsluCounter, 2745 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 991 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:11,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 2814 Invalid, 2707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1679 Invalid, 0 Unknown, 991 Unchecked, 0.4s Time] [2021-12-07 00:57:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-07 00:57:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2021-12-07 00:57:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 162 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2021-12-07 00:57:11,197 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 151 [2021-12-07 00:57:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:11,197 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2021-12-07 00:57:11,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 5.5423728813559325) internal successors, (327), 59 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2021-12-07 00:57:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 00:57:11,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:11,198 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:11,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 00:57:11,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:11,399 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:57:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash 91029361, now seen corresponding path program 14 times [2021-12-07 00:57:11,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:11,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941690488] [2021-12-07 00:57:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:11,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 66 proven. 358 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-07 00:57:11,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941690488] [2021-12-07 00:57:11,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941690488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041525395] [2021-12-07 00:57:11,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:57:11,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:11,630 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:11,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 00:57:11,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:57:11,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:57:11,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-07 00:57:11,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:11,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 00:57:11,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:57:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 91 proven. 333 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-07 00:57:12,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 120 proven. 304 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-07 00:57:13,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041525395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:13,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:13,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2021-12-07 00:57:13,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163691686] [2021-12-07 00:57:13,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:13,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-07 00:57:13,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:13,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-07 00:57:13,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2960, Unknown=0, NotChecked=0, Total=3306 [2021-12-07 00:57:13,098 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 58 states, 57 states have (on average 6.649122807017544) internal successors, (379), 58 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:13,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:13,782 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2021-12-07 00:57:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 00:57:13,782 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 6.649122807017544) internal successors, (379), 58 states have internal predecessors, (379), 0 states have call successors, (0), 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 159 [2021-12-07 00:57:13,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:13,783 INFO L225 Difference]: With dead ends: 182 [2021-12-07 00:57:13,783 INFO L226 Difference]: Without dead ends: 180 [2021-12-07 00:57:13,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=964, Invalid=4888, Unknown=0, NotChecked=0, Total=5852 [2021-12-07 00:57:13,784 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 960 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:13,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 1147 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:57:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-07 00:57:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2021-12-07 00:57:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 171 states have (on average 1.023391812865497) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2021-12-07 00:57:13,787 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 159 [2021-12-07 00:57:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:13,787 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2021-12-07 00:57:13,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 6.649122807017544) internal successors, (379), 58 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2021-12-07 00:57:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-07 00:57:13,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:13,788 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:13,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-07 00:57:13,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-07 00:57:13,988 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:57:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:13,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2026679580, now seen corresponding path program 15 times [2021-12-07 00:57:13,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919703999] [2021-12-07 00:57:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:13,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-07 00:57:14,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:14,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919703999] [2021-12-07 00:57:14,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919703999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:14,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422003701] [2021-12-07 00:57:14,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:57:14,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:14,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:14,317 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:14,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 00:57:15,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-07 00:57:15,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:57:15,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-07 00:57:15,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:15,530 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 14 treesize of output 10 [2021-12-07 00:57:16,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:57:16,667 INFO L354 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2021-12-07 00:57:16,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2021-12-07 00:57:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 599 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:57:16,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:17,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:57:17,939 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 91 treesize of output 91 [2021-12-07 00:57:17,954 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 36 treesize of output 32 [2021-12-07 00:57:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-07 00:57:18,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422003701] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:18,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:18,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 37, 29] total 82 [2021-12-07 00:57:18,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954836942] [2021-12-07 00:57:18,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:18,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-07 00:57:18,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:18,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-07 00:57:18,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=6419, Unknown=0, NotChecked=0, Total=6642 [2021-12-07 00:57:18,431 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 82 states, 82 states have (on average 5.2560975609756095) internal successors, (431), 82 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) [2021-12-07 00:57:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:20,907 INFO L93 Difference]: Finished difference Result 504 states and 509 transitions. [2021-12-07 00:57:20,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-07 00:57:20,908 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 5.2560975609756095) internal successors, (431), 82 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 169 [2021-12-07 00:57:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:20,908 INFO L225 Difference]: With dead ends: 504 [2021-12-07 00:57:20,909 INFO L226 Difference]: Without dead ends: 187 [2021-12-07 00:57:20,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=710, Invalid=18196, Unknown=0, NotChecked=0, Total=18906 [2021-12-07 00:57:20,910 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 181 mSDsluCounter, 4394 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 4472 SdHoareTripleChecker+Invalid, 4029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1427 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:20,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 4472 Invalid, 4029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2543 Invalid, 0 Unknown, 1427 Unchecked, 0.6s Time] [2021-12-07 00:57:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-07 00:57:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2021-12-07 00:57:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 179 states have (on average 1.0223463687150838) internal successors, (183), 180 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2021-12-07 00:57:20,913 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 169 [2021-12-07 00:57:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:20,913 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2021-12-07 00:57:20,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 5.2560975609756095) internal successors, (431), 82 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) [2021-12-07 00:57:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2021-12-07 00:57:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-07 00:57:20,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:20,914 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:20,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-07 00:57:21,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-07 00:57:21,116 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:57:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1674389986, now seen corresponding path program 16 times [2021-12-07 00:57:21,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:21,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676143942] [2021-12-07 00:57:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:21,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 91 proven. 449 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-07 00:57:21,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:21,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676143942] [2021-12-07 00:57:21,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676143942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:21,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781145533] [2021-12-07 00:57:21,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:57:21,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:21,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:21,362 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:21,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 00:57:21,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:57:21,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:57:21,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-07 00:57:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 120 proven. 420 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-07 00:57:22,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:22,413 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 [2021-12-07 00:57:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 120 proven. 420 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-07 00:57:22,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781145533] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:22,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:22,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2021-12-07 00:57:22,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739761819] [2021-12-07 00:57:22,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:22,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-07 00:57:22,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-07 00:57:22,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-12-07 00:57:22,486 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand has 48 states, 47 states have (on average 6.382978723404255) internal successors, (300), 48 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:23,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:23,017 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2021-12-07 00:57:23,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 00:57:23,017 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.382978723404255) internal successors, (300), 48 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-12-07 00:57:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:23,018 INFO L225 Difference]: With dead ends: 200 [2021-12-07 00:57:23,018 INFO L226 Difference]: Without dead ends: 198 [2021-12-07 00:57:23,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 326 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=690, Invalid=2970, Unknown=0, NotChecked=0, Total=3660 [2021-12-07 00:57:23,019 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 879 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:23,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1187 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:57:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-07 00:57:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 191. [2021-12-07 00:57:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.0211640211640212) internal successors, (193), 190 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2021-12-07 00:57:23,021 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 177 [2021-12-07 00:57:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:23,022 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2021-12-07 00:57:23,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.382978723404255) internal successors, (300), 48 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2021-12-07 00:57:23,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-07 00:57:23,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:23,023 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:23,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 00:57:23,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:23,224 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:57:23,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:23,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1653391795, now seen corresponding path program 17 times [2021-12-07 00:57:23,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:23,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391922313] [2021-12-07 00:57:23,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:23,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-07 00:57:23,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:23,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391922313] [2021-12-07 00:57:23,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391922313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:23,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677535213] [2021-12-07 00:57:23,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:57:23,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:23,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:23,672 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:23,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 00:57:24,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-07 00:57:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:57:24,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-07 00:57:24,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:24,362 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 14 treesize of output 10 [2021-12-07 00:57:25,533 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 [2021-12-07 00:57:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-07 00:57:25,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:26,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:57:26,592 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 91 treesize of output 91 [2021-12-07 00:57:26,623 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 36 treesize of output 32 [2021-12-07 00:57:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-07 00:57:26,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677535213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:26,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:26,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31, 31] total 69 [2021-12-07 00:57:26,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840678306] [2021-12-07 00:57:26,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:26,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-07 00:57:26,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-07 00:57:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4518, Unknown=0, NotChecked=0, Total=4692 [2021-12-07 00:57:26,808 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:29,449 INFO L93 Difference]: Finished difference Result 554 states and 559 transitions. [2021-12-07 00:57:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-07 00:57:29,450 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 states have internal predecessors, (403), 0 states have call successors, (0), 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 187 [2021-12-07 00:57:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:29,451 INFO L225 Difference]: With dead ends: 554 [2021-12-07 00:57:29,451 INFO L226 Difference]: Without dead ends: 205 [2021-12-07 00:57:29,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 332 SyntacticMatches, 13 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 2696 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=526, Invalid=13516, Unknown=0, NotChecked=0, Total=14042 [2021-12-07 00:57:29,452 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 141 mSDsluCounter, 4017 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 4103 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1139 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:29,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 4103 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2366 Invalid, 0 Unknown, 1139 Unchecked, 0.5s Time] [2021-12-07 00:57:29,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-07 00:57:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2021-12-07 00:57:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 197 states have (on average 1.0203045685279188) internal successors, (201), 198 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2021-12-07 00:57:29,455 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 187 [2021-12-07 00:57:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:29,455 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2021-12-07 00:57:29,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2021-12-07 00:57:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-07 00:57:29,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:29,456 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:29,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-07 00:57:29,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:29,657 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:57:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash -471861869, now seen corresponding path program 18 times [2021-12-07 00:57:29,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:29,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94492954] [2021-12-07 00:57:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:29,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 120 proven. 550 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-07 00:57:30,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:30,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94492954] [2021-12-07 00:57:30,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94492954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:30,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41203538] [2021-12-07 00:57:30,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:57:30,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:30,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:30,002 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:30,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 00:57:31,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-07 00:57:31,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:57:31,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-07 00:57:31,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:31,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:57:31,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 00:57:31,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:57:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 153 proven. 517 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-07 00:57:32,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 190 proven. 480 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-07 00:57:33,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41203538] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:33,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:33,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2021-12-07 00:57:33,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265875462] [2021-12-07 00:57:33,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:33,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-07 00:57:33,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-07 00:57:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=4379, Unknown=0, NotChecked=0, Total=4970 [2021-12-07 00:57:33,304 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 71 states, 70 states have (on average 6.7) internal successors, (469), 71 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:34,243 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2021-12-07 00:57:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 00:57:34,244 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 6.7) internal successors, (469), 71 states have internal predecessors, (469), 0 states have call successors, (0), 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 195 [2021-12-07 00:57:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:34,245 INFO L225 Difference]: With dead ends: 218 [2021-12-07 00:57:34,245 INFO L226 Difference]: Without dead ends: 216 [2021-12-07 00:57:34,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1561, Invalid=7181, Unknown=0, NotChecked=0, Total=8742 [2021-12-07 00:57:34,246 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1683 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:34,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 1184 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:57:34,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-07 00:57:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 209. [2021-12-07 00:57:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 208 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2021-12-07 00:57:34,249 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 195 [2021-12-07 00:57:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:34,249 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2021-12-07 00:57:34,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 6.7) internal successors, (469), 71 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2021-12-07 00:57:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-07 00:57:34,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:34,250 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:34,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 00:57:34,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-07 00:57:34,450 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:57:34,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:34,451 INFO L85 PathProgramCache]: Analyzing trace with hash -85729090, now seen corresponding path program 19 times [2021-12-07 00:57:34,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:34,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952283913] [2021-12-07 00:57:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:34,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 33 proven. 740 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-07 00:57:34,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:34,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952283913] [2021-12-07 00:57:34,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952283913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:34,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32214076] [2021-12-07 00:57:34,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:57:34,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:34,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:34,860 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:34,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-07 00:57:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-07 00:57:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:35,306 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 14 treesize of output 10 [2021-12-07 00:57:36,686 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 [2021-12-07 00:57:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 33 proven. 740 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-07 00:57:36,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:39,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:57:39,570 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 91 treesize of output 91 [2021-12-07 00:57:39,604 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 36 treesize of output 32 [2021-12-07 00:57:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 33 proven. 740 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-07 00:57:39,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32214076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:39,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:39,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 33, 33] total 74 [2021-12-07 00:57:39,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286110599] [2021-12-07 00:57:39,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:39,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-07 00:57:39,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:39,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-07 00:57:39,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=5216, Unknown=0, NotChecked=0, Total=5402 [2021-12-07 00:57:39,815 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 74 states, 74 states have (on average 5.95945945945946) internal successors, (441), 74 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:43,207 INFO L93 Difference]: Finished difference Result 606 states and 611 transitions. [2021-12-07 00:57:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-07 00:57:43,207 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 5.95945945945946) internal successors, (441), 74 states have internal predecessors, (441), 0 states have call successors, (0), 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 205 [2021-12-07 00:57:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:43,208 INFO L225 Difference]: With dead ends: 606 [2021-12-07 00:57:43,208 INFO L226 Difference]: Without dead ends: 223 [2021-12-07 00:57:43,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 365 SyntacticMatches, 14 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=570, Invalid=15942, Unknown=0, NotChecked=0, Total=16512 [2021-12-07 00:57:43,209 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 156 mSDsluCounter, 4753 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 4846 SdHoareTripleChecker+Invalid, 4441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1483 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:43,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 4846 Invalid, 4441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2912 Invalid, 0 Unknown, 1483 Unchecked, 0.7s Time] [2021-12-07 00:57:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-07 00:57:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 217. [2021-12-07 00:57:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 216 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) [2021-12-07 00:57:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2021-12-07 00:57:43,212 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 205 [2021-12-07 00:57:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:43,212 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2021-12-07 00:57:43,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 5.95945945945946) internal successors, (441), 74 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2021-12-07 00:57:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-07 00:57:43,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:43,213 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:43,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-07 00:57:43,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:43,415 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:57:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:43,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1278947972, now seen corresponding path program 20 times [2021-12-07 00:57:43,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:43,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646771271] [2021-12-07 00:57:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:43,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 153 proven. 661 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-07 00:57:43,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:43,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646771271] [2021-12-07 00:57:43,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646771271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:43,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266512144] [2021-12-07 00:57:43,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:57:43,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:43,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:43,740 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:43,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-07 00:57:43,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:57:43,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:57:43,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-07 00:57:43,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 190 proven. 624 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-07 00:57:44,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:44,918 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 [2021-12-07 00:57:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 190 proven. 624 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-07 00:57:45,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266512144] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:45,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:45,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 65 [2021-12-07 00:57:45,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977943337] [2021-12-07 00:57:45,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:45,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-07 00:57:45,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:45,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-07 00:57:45,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=3711, Unknown=0, NotChecked=0, Total=4290 [2021-12-07 00:57:45,345 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 66 states, 65 states have (on average 6.276923076923077) internal successors, (408), 66 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:45,990 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2021-12-07 00:57:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-07 00:57:45,990 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 6.276923076923077) internal successors, (408), 66 states have internal predecessors, (408), 0 states have call successors, (0), 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 213 [2021-12-07 00:57:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:45,991 INFO L225 Difference]: With dead ends: 236 [2021-12-07 00:57:45,991 INFO L226 Difference]: Without dead ends: 234 [2021-12-07 00:57:45,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 385 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1307, Invalid=5173, Unknown=0, NotChecked=0, Total=6480 [2021-12-07 00:57:45,992 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 628 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:45,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 1479 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:57:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-07 00:57:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 227. [2021-12-07 00:57:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0177777777777777) internal successors, (229), 226 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2021-12-07 00:57:45,996 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 213 [2021-12-07 00:57:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:45,996 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2021-12-07 00:57:45,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 6.276923076923077) internal successors, (408), 66 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2021-12-07 00:57:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-07 00:57:45,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:45,998 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:46,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-07 00:57:46,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-07 00:57:46,199 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:57:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1297062801, now seen corresponding path program 21 times [2021-12-07 00:57:46,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:46,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215503043] [2021-12-07 00:57:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:46,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 36 proven. 891 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-07 00:57:46,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215503043] [2021-12-07 00:57:46,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215503043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378419827] [2021-12-07 00:57:46,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:57:46,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:46,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:46,718 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:46,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-07 00:57:51,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-07 00:57:51,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:57:51,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-07 00:57:51,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:51,810 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 14 treesize of output 10 [2021-12-07 00:57:53,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:57:53,183 INFO L354 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2021-12-07 00:57:53,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2021-12-07 00:57:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 36 proven. 891 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-07 00:57:53,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:56,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:57:56,909 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 91 treesize of output 91 [2021-12-07 00:57:56,917 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 36 treesize of output 32 [2021-12-07 00:57:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 36 proven. 891 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-07 00:57:57,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378419827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:57,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:57,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 36, 35] total 93 [2021-12-07 00:57:57,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325528796] [2021-12-07 00:57:57,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:57,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-12-07 00:57:57,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:57,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-12-07 00:57:57,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=8309, Unknown=0, NotChecked=0, Total=8556 [2021-12-07 00:57:57,592 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand has 93 states, 93 states have (on average 5.688172043010753) internal successors, (529), 93 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:01,158 INFO L93 Difference]: Finished difference Result 660 states and 665 transitions. [2021-12-07 00:58:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-07 00:58:01,158 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 5.688172043010753) internal successors, (529), 93 states have internal predecessors, (529), 0 states have call successors, (0), 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 223 [2021-12-07 00:58:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:01,159 INFO L225 Difference]: With dead ends: 660 [2021-12-07 00:58:01,159 INFO L226 Difference]: Without dead ends: 241 [2021-12-07 00:58:01,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4305 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=844, Invalid=25888, Unknown=0, NotChecked=0, Total=26732 [2021-12-07 00:58:01,161 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 222 mSDsluCounter, 6579 mSDsCounter, 0 mSdLazyCounter, 3534 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 6680 SdHoareTripleChecker+Invalid, 5282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1673 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:01,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 6680 Invalid, 5282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 3534 Invalid, 0 Unknown, 1673 Unchecked, 0.8s Time] [2021-12-07 00:58:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-07 00:58:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 235. [2021-12-07 00:58:01,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 233 states have (on average 1.0171673819742488) internal successors, (237), 234 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2021-12-07 00:58:01,163 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 223 [2021-12-07 00:58:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:01,164 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2021-12-07 00:58:01,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 5.688172043010753) internal successors, (529), 93 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2021-12-07 00:58:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-07 00:58:01,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:01,165 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:01,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-07 00:58:01,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-07 00:58:01,366 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:58:01,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:01,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1503178933, now seen corresponding path program 22 times [2021-12-07 00:58:01,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:01,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601051820] [2021-12-07 00:58:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:01,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 190 proven. 782 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-07 00:58:01,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601051820] [2021-12-07 00:58:01,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601051820] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310930966] [2021-12-07 00:58:01,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:58:01,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:01,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:01,697 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:01,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-07 00:58:02,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:58:02,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:58:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-07 00:58:02,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:02,126 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:58:02,126 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 00:58:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 231 proven. 741 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-07 00:58:02,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 231 proven. 741 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-07 00:58:03,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310930966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:03,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:58:03,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 72 [2021-12-07 00:58:03,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054849729] [2021-12-07 00:58:03,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:03,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-07 00:58:03,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:03,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-07 00:58:03,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=4574, Unknown=0, NotChecked=0, Total=5256 [2021-12-07 00:58:03,755 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 73 states, 72 states have (on average 6.111111111111111) internal successors, (440), 73 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:04,570 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2021-12-07 00:58:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 00:58:04,575 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 6.111111111111111) internal successors, (440), 73 states have internal predecessors, (440), 0 states have call successors, (0), 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 231 [2021-12-07 00:58:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:04,576 INFO L225 Difference]: With dead ends: 254 [2021-12-07 00:58:04,576 INFO L226 Difference]: Without dead ends: 252 [2021-12-07 00:58:04,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 416 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1517, Invalid=6315, Unknown=0, NotChecked=0, Total=7832 [2021-12-07 00:58:04,576 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1076 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:04,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 1861 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1966 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 00:58:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-07 00:58:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2021-12-07 00:58:04,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 243 states have (on average 1.0164609053497942) internal successors, (247), 244 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) [2021-12-07 00:58:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2021-12-07 00:58:04,579 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 231 [2021-12-07 00:58:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:04,579 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2021-12-07 00:58:04,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 6.111111111111111) internal successors, (440), 73 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2021-12-07 00:58:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-07 00:58:04,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:04,581 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:04,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-07 00:58:04,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-07 00:58:04,782 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:58:04,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:04,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2140051808, now seen corresponding path program 23 times [2021-12-07 00:58:04,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:04,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017566293] [2021-12-07 00:58:04,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:04,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 39 proven. 1056 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-07 00:58:05,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:05,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017566293] [2021-12-07 00:58:05,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017566293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:05,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320795231] [2021-12-07 00:58:05,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:58:05,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:05,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:05,303 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:05,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-07 00:58:07,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-07 00:58:07,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:58:07,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-07 00:58:07,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:07,626 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 14 treesize of output 10 [2021-12-07 00:58:09,287 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 [2021-12-07 00:58:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 39 proven. 1056 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-07 00:58:09,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:10,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:58:10,920 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 91 treesize of output 91 [2021-12-07 00:58:10,956 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 36 treesize of output 32 [2021-12-07 00:58:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 39 proven. 1056 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-07 00:58:11,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320795231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:11,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:58:11,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 37, 37] total 84 [2021-12-07 00:58:11,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447036336] [2021-12-07 00:58:11,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:11,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-07 00:58:11,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:11,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-07 00:58:11,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6762, Unknown=0, NotChecked=0, Total=6972 [2021-12-07 00:58:11,168 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 84 states, 84 states have (on average 6.154761904761905) internal successors, (517), 84 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:15,250 INFO L93 Difference]: Finished difference Result 710 states and 715 transitions. [2021-12-07 00:58:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-07 00:58:15,250 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 6.154761904761905) internal successors, (517), 84 states have internal predecessors, (517), 0 states have call successors, (0), 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 241 [2021-12-07 00:58:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:15,251 INFO L225 Difference]: With dead ends: 710 [2021-12-07 00:58:15,252 INFO L226 Difference]: Without dead ends: 259 [2021-12-07 00:58:15,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 431 SyntacticMatches, 16 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 14 DeprecatedPredicates, 4125 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=635, Invalid=20535, Unknown=0, NotChecked=0, Total=21170 [2021-12-07 00:58:15,253 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 147 mSDsluCounter, 6477 mSDsCounter, 0 mSdLazyCounter, 3968 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6586 SdHoareTripleChecker+Invalid, 5867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1848 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:15,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 6586 Invalid, 5867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3968 Invalid, 0 Unknown, 1848 Unchecked, 0.9s Time] [2021-12-07 00:58:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-07 00:58:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 253. [2021-12-07 00:58:15,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 251 states have (on average 1.0159362549800797) internal successors, (255), 252 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2021-12-07 00:58:15,256 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 241 [2021-12-07 00:58:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:15,256 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2021-12-07 00:58:15,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 6.154761904761905) internal successors, (517), 84 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2021-12-07 00:58:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-07 00:58:15,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:15,257 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:15,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-07 00:58:15,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-07 00:58:15,458 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:58:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:15,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1742094374, now seen corresponding path program 24 times [2021-12-07 00:58:15,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:15,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96126648] [2021-12-07 00:58:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:15,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 231 proven. 913 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-07 00:58:15,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:15,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96126648] [2021-12-07 00:58:15,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96126648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:15,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016780594] [2021-12-07 00:58:15,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:58:15,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:15,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:15,843 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:15,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-07 00:58:19,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-07 00:58:19,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:58:19,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-07 00:58:19,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:19,673 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:58:19,673 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 00:58:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 276 proven. 868 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-07 00:58:20,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 325 proven. 819 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-07 00:58:22,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016780594] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:22,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:58:22,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 76 [2021-12-07 00:58:22,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677068301] [2021-12-07 00:58:22,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:22,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-07 00:58:22,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-07 00:58:22,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=5039, Unknown=0, NotChecked=0, Total=5852 [2021-12-07 00:58:22,212 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand has 77 states, 76 states have (on average 7.078947368421052) internal successors, (538), 77 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:22,979 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2021-12-07 00:58:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 00:58:22,979 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 7.078947368421052) internal successors, (538), 77 states have internal predecessors, (538), 0 states have call successors, (0), 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 249 [2021-12-07 00:58:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:22,980 INFO L225 Difference]: With dead ends: 275 [2021-12-07 00:58:22,980 INFO L226 Difference]: Without dead ends: 273 [2021-12-07 00:58:22,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 468 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1672, Invalid=7448, Unknown=0, NotChecked=0, Total=9120 [2021-12-07 00:58:22,981 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 1280 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:22,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 1546 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1343 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2021-12-07 00:58:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-07 00:58:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 263. [2021-12-07 00:58:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 261 states have (on average 1.0153256704980842) internal successors, (265), 262 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2021-12-07 00:58:22,984 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 249 [2021-12-07 00:58:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:22,984 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2021-12-07 00:58:22,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 7.078947368421052) internal successors, (538), 77 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2021-12-07 00:58:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-07 00:58:22,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:22,986 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:23,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-07 00:58:23,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-07 00:58:23,187 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:58:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:23,188 INFO L85 PathProgramCache]: Analyzing trace with hash 509104017, now seen corresponding path program 25 times [2021-12-07 00:58:23,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:23,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006921974] [2021-12-07 00:58:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:23,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 42 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:58:24,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:24,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006921974] [2021-12-07 00:58:24,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006921974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:24,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572951753] [2021-12-07 00:58:24,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:58:24,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:24,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:24,875 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:24,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-07 00:58:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:25,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-07 00:58:25,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:25,602 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 14 treesize of output 10 [2021-12-07 00:58:27,793 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 [2021-12-07 00:58:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 42 proven. 1235 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-07 00:58:27,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:29,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:58:29,880 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 91 treesize of output 91 [2021-12-07 00:58:29,911 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 36 treesize of output 32 [2021-12-07 00:58:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 42 proven. 1235 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-07 00:58:30,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572951753] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:30,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:58:30,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 39, 39] total 106 [2021-12-07 00:58:30,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106996973] [2021-12-07 00:58:30,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:30,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-12-07 00:58:30,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:30,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-12-07 00:58:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=10841, Unknown=0, NotChecked=0, Total=11130 [2021-12-07 00:58:30,188 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 106 states, 106 states have (on average 5.688679245283019) internal successors, (603), 106 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:36,633 INFO L93 Difference]: Finished difference Result 762 states and 767 transitions. [2021-12-07 00:58:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-07 00:58:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 5.688679245283019) internal successors, (603), 106 states have internal predecessors, (603), 0 states have call successors, (0), 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 259 [2021-12-07 00:58:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:36,635 INFO L225 Difference]: With dead ends: 762 [2021-12-07 00:58:36,635 INFO L226 Difference]: Without dead ends: 277 [2021-12-07 00:58:36,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 463 SyntacticMatches, 17 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 15 DeprecatedPredicates, 6873 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=827, Invalid=28929, Unknown=0, NotChecked=0, Total=29756 [2021-12-07 00:58:36,636 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 230 mSDsluCounter, 7833 mSDsCounter, 0 mSdLazyCounter, 5296 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 7950 SdHoareTripleChecker+Invalid, 7456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 5296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2059 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:36,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 7950 Invalid, 7456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 5296 Invalid, 0 Unknown, 2059 Unchecked, 1.5s Time] [2021-12-07 00:58:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-07 00:58:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 271. [2021-12-07 00:58:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 269 states have (on average 1.0148698884758365) internal successors, (273), 270 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2021-12-07 00:58:36,639 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 259 [2021-12-07 00:58:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:36,640 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2021-12-07 00:58:36,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 5.688679245283019) internal successors, (603), 106 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2021-12-07 00:58:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-07 00:58:36,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:36,641 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:36,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-07 00:58:36,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-07 00:58:36,842 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:58:36,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:36,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1526051031, now seen corresponding path program 26 times [2021-12-07 00:58:36,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:36,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353447723] [2021-12-07 00:58:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:36,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 276 proven. 1054 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-07 00:58:37,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:37,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353447723] [2021-12-07 00:58:37,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353447723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:37,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192182088] [2021-12-07 00:58:37,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:58:37,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:37,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:37,256 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:37,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-07 00:58:37,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:58:37,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:58:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-07 00:58:37,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 325 proven. 1005 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-07 00:58:38,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:38,881 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 [2021-12-07 00:58:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 325 proven. 1005 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-07 00:58:38,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192182088] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:38,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:58:38,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 67 [2021-12-07 00:58:38,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17217394] [2021-12-07 00:58:38,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:38,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-07 00:58:38,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:38,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-07 00:58:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=4002, Unknown=0, NotChecked=0, Total=4556 [2021-12-07 00:58:38,986 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand has 68 states, 67 states have (on average 6.567164179104478) internal successors, (440), 68 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:39,884 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2021-12-07 00:58:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 00:58:39,884 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 6.567164179104478) internal successors, (440), 68 states have internal predecessors, (440), 0 states have call successors, (0), 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 267 [2021-12-07 00:58:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:39,885 INFO L225 Difference]: With dead ends: 290 [2021-12-07 00:58:39,885 INFO L226 Difference]: Without dead ends: 288 [2021-12-07 00:58:39,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 496 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1350, Invalid=5960, Unknown=0, NotChecked=0, Total=7310 [2021-12-07 00:58:39,886 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 1413 mSDsluCounter, 2030 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 2148 SdHoareTripleChecker+Invalid, 2326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:39,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1413 Valid, 2148 Invalid, 2326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 00:58:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-07 00:58:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 281. [2021-12-07 00:58:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 279 states have (on average 1.014336917562724) internal successors, (283), 280 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2021-12-07 00:58:39,889 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 267 [2021-12-07 00:58:39,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:39,889 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2021-12-07 00:58:39,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 6.567164179104478) internal successors, (440), 68 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:39,889 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2021-12-07 00:58:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-12-07 00:58:39,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:39,891 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:39,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-07 00:58:40,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:40,092 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:58:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash -150251774, now seen corresponding path program 27 times [2021-12-07 00:58:40,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:40,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781244391] [2021-12-07 00:58:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:40,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 45 proven. 1428 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-07 00:58:40,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:40,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781244391] [2021-12-07 00:58:40,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781244391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:40,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937226915] [2021-12-07 00:58:40,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:58:40,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:40,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:40,688 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:40,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-07 00:58:52,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-07 00:58:52,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:58:52,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-07 00:58:52,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:52,994 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 14 treesize of output 10 [2021-12-07 00:58:55,005 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 [2021-12-07 00:58:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 45 proven. 1428 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-07 00:58:55,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:59:00,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:59:00,741 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 91 treesize of output 91 [2021-12-07 00:59:00,775 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 36 treesize of output 32 [2021-12-07 00:59:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 45 proven. 1428 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-07 00:59:01,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937226915] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:59:01,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:59:01,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 41, 41] total 94 [2021-12-07 00:59:01,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433520815] [2021-12-07 00:59:01,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:59:01,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-07 00:59:01,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:01,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-07 00:59:01,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=8508, Unknown=0, NotChecked=0, Total=8742 [2021-12-07 00:59:01,026 INFO L87 Difference]: Start difference. First operand 281 states and 283 transitions. Second operand has 94 states, 94 states have (on average 6.308510638297872) internal successors, (593), 94 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:06,405 INFO L93 Difference]: Finished difference Result 814 states and 819 transitions. [2021-12-07 00:59:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-12-07 00:59:06,405 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 6.308510638297872) internal successors, (593), 94 states have internal predecessors, (593), 0 states have call successors, (0), 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 277 [2021-12-07 00:59:06,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:06,406 INFO L225 Difference]: With dead ends: 814 [2021-12-07 00:59:06,406 INFO L226 Difference]: Without dead ends: 295 [2021-12-07 00:59:06,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 497 SyntacticMatches, 18 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 16 DeprecatedPredicates, 5250 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=709, Invalid=26023, Unknown=0, NotChecked=0, Total=26732 [2021-12-07 00:59:06,408 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 160 mSDsluCounter, 8915 mSDsCounter, 0 mSdLazyCounter, 5279 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 9040 SdHoareTripleChecker+Invalid, 8000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 5279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2665 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:06,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 9040 Invalid, 8000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 5279 Invalid, 0 Unknown, 2665 Unchecked, 1.3s Time] [2021-12-07 00:59:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-07 00:59:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 289. [2021-12-07 00:59:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 287 states have (on average 1.0139372822299653) internal successors, (291), 288 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 291 transitions. [2021-12-07 00:59:06,411 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 291 transitions. Word has length 277 [2021-12-07 00:59:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:06,411 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 291 transitions. [2021-12-07 00:59:06,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 6.308510638297872) internal successors, (593), 94 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:06,411 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 291 transitions. [2021-12-07 00:59:06,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-07 00:59:06,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:06,412 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:06,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-07 00:59:06,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:06,613 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:59:06,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:06,613 INFO L85 PathProgramCache]: Analyzing trace with hash -937635128, now seen corresponding path program 28 times [2021-12-07 00:59:06,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:06,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683133323] [2021-12-07 00:59:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:06,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 325 proven. 1205 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-07 00:59:07,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:07,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683133323] [2021-12-07 00:59:07,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683133323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:59:07,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644192926] [2021-12-07 00:59:07,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:59:07,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:07,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:59:07,061 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:59:07,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-07 00:59:07,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:59:07,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:59:07,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-07 00:59:07,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:59:07,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:59:07,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 00:59:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 378 proven. 1152 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-07 00:59:09,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:59:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 435 proven. 1095 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-07 00:59:11,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644192926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:59:11,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:59:11,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 98 [2021-12-07 00:59:11,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124963794] [2021-12-07 00:59:11,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:59:11,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-07 00:59:11,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:11,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-07 00:59:11,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=8645, Unknown=0, NotChecked=0, Total=9702 [2021-12-07 00:59:11,551 INFO L87 Difference]: Start difference. First operand 289 states and 291 transitions. Second operand has 99 states, 98 states have (on average 6.928571428571429) internal successors, (679), 99 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:12,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:12,742 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2021-12-07 00:59:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-07 00:59:12,742 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 6.928571428571429) internal successors, (679), 99 states have internal predecessors, (679), 0 states have call successors, (0), 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 285 [2021-12-07 00:59:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:12,743 INFO L225 Difference]: With dead ends: 308 [2021-12-07 00:59:12,743 INFO L226 Difference]: Without dead ends: 306 [2021-12-07 00:59:12,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3431 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2164, Invalid=11642, Unknown=0, NotChecked=0, Total=13806 [2021-12-07 00:59:12,744 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 1673 mSDsluCounter, 2613 mSDsCounter, 0 mSdLazyCounter, 2795 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1673 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:12,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1673 Valid, 2737 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2795 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 00:59:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-07 00:59:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2021-12-07 00:59:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 297 states have (on average 1.0134680134680134) internal successors, (301), 298 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) [2021-12-07 00:59:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 301 transitions. [2021-12-07 00:59:12,747 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 301 transitions. Word has length 285 [2021-12-07 00:59:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:12,747 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 301 transitions. [2021-12-07 00:59:12,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 6.928571428571429) internal successors, (679), 99 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:12,748 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 301 transitions. [2021-12-07 00:59:12,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-12-07 00:59:12,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:12,749 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:12,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-07 00:59:12,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-07 00:59:12,950 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:59:12,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:12,951 INFO L85 PathProgramCache]: Analyzing trace with hash 97091507, now seen corresponding path program 29 times [2021-12-07 00:59:12,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:12,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767752517] [2021-12-07 00:59:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:12,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2118 backedges. 48 proven. 1635 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-07 00:59:13,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:13,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767752517] [2021-12-07 00:59:13,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767752517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:59:13,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607955318] [2021-12-07 00:59:13,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:59:13,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:13,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:59:13,668 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:59:13,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-07 00:59:17,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-07 00:59:17,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:59:17,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-07 00:59:17,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:59:17,719 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 14 treesize of output 10 [2021-12-07 00:59:19,928 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 [2021-12-07 00:59:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2118 backedges. 48 proven. 1635 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-07 00:59:19,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:59:22,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:59:22,240 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 91 treesize of output 91 [2021-12-07 00:59:22,275 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 36 treesize of output 32 [2021-12-07 00:59:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2118 backedges. 48 proven. 1635 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-07 00:59:22,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607955318] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:59:22,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:59:22,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 43, 43] total 99 [2021-12-07 00:59:22,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916088921] [2021-12-07 00:59:22,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:59:22,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-07 00:59:22,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-07 00:59:22,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=9456, Unknown=0, NotChecked=0, Total=9702 [2021-12-07 00:59:22,548 INFO L87 Difference]: Start difference. First operand 299 states and 301 transitions. Second operand has 99 states, 99 states have (on average 6.373737373737374) internal successors, (631), 99 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:28,578 INFO L93 Difference]: Finished difference Result 866 states and 871 transitions. [2021-12-07 00:59:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-12-07 00:59:28,578 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 6.373737373737374) internal successors, (631), 99 states have internal predecessors, (631), 0 states have call successors, (0), 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 295 [2021-12-07 00:59:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:28,579 INFO L225 Difference]: With dead ends: 866 [2021-12-07 00:59:28,579 INFO L226 Difference]: Without dead ends: 313 [2021-12-07 00:59:28,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 530 SyntacticMatches, 19 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 17 DeprecatedPredicates, 5859 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=746, Invalid=29010, Unknown=0, NotChecked=0, Total=29756 [2021-12-07 00:59:28,581 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 169 mSDsluCounter, 10009 mSDsCounter, 0 mSdLazyCounter, 5690 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 10142 SdHoareTripleChecker+Invalid, 8449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 5690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2699 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:28,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 10142 Invalid, 8449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 5690 Invalid, 0 Unknown, 2699 Unchecked, 1.3s Time] [2021-12-07 00:59:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-12-07 00:59:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 307. [2021-12-07 00:59:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 305 states have (on average 1.0131147540983607) internal successors, (309), 306 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 309 transitions. [2021-12-07 00:59:28,584 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 309 transitions. Word has length 295 [2021-12-07 00:59:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:28,584 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 309 transitions. [2021-12-07 00:59:28,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 6.373737373737374) internal successors, (631), 99 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 309 transitions. [2021-12-07 00:59:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-07 00:59:28,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:28,585 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:28,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-07 00:59:28,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:28,787 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 00:59:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1586853369, now seen corresponding path program 30 times [2021-12-07 00:59:28,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159108524] [2021-12-07 00:59:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:28,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 378 proven. 1366 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-07 00:59:29,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159108524] [2021-12-07 00:59:29,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159108524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:59:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277820639] [2021-12-07 00:59:29,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:59:29,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:29,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:59:29,251 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:59:29,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-07 01:00:15,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-07 01:00:15,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:00:15,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-07 01:00:15,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:15,304 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:00:15,304 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:00:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 435 proven. 1309 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-07 01:00:16,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:00:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 496 proven. 1248 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-07 01:00:18,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277820639] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:00:18,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:00:18,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 91 [2021-12-07 01:00:18,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49349869] [2021-12-07 01:00:18,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:00:18,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-07 01:00:18,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:18,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-07 01:00:18,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1195, Invalid=7177, Unknown=0, NotChecked=0, Total=8372 [2021-12-07 01:00:18,332 INFO L87 Difference]: Start difference. First operand 307 states and 309 transitions. Second operand has 92 states, 91 states have (on average 7.164835164835165) internal successors, (652), 92 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:00:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:19,369 INFO L93 Difference]: Finished difference Result 326 states and 328 transitions. [2021-12-07 01:00:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-07 01:00:19,370 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 7.164835164835165) internal successors, (652), 92 states have internal predecessors, (652), 0 states have call successors, (0), 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 303 [2021-12-07 01:00:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:19,371 INFO L225 Difference]: With dead ends: 326 [2021-12-07 01:00:19,371 INFO L226 Difference]: Without dead ends: 324 [2021-12-07 01:00:19,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 549 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2816 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2362, Invalid=10070, Unknown=0, NotChecked=0, Total=12432 [2021-12-07 01:00:19,372 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 1443 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:19,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 1779 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:00:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-07 01:00:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 317. [2021-12-07 01:00:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 315 states have (on average 1.0126984126984127) internal successors, (319), 316 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:00:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 319 transitions. [2021-12-07 01:00:19,375 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 319 transitions. Word has length 303 [2021-12-07 01:00:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:19,375 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 319 transitions. [2021-12-07 01:00:19,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 7.164835164835165) internal successors, (652), 92 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:00:19,375 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 319 transitions. [2021-12-07 01:00:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-12-07 01:00:19,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:19,376 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:00:19,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-07 01:00:19,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-07 01:00:19,577 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:00:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:19,577 INFO L85 PathProgramCache]: Analyzing trace with hash 64526756, now seen corresponding path program 31 times [2021-12-07 01:00:19,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:19,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393751248] [2021-12-07 01:00:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:19,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 51 proven. 1856 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-07 01:00:20,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:20,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393751248] [2021-12-07 01:00:20,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393751248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:20,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072248098] [2021-12-07 01:00:20,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:00:20,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:20,305 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:20,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-07 01:00:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:20,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-07 01:00:20,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:21,182 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 14 treesize of output 10 [2021-12-07 01:00:23,802 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 [2021-12-07 01:00:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 51 proven. 1856 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-07 01:00:23,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:00:26,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:00:26,307 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 91 treesize of output 91 [2021-12-07 01:00:26,342 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 36 treesize of output 32 [2021-12-07 01:00:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 51 proven. 1856 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-07 01:00:26,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072248098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:00:26,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:00:26,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 45, 45] total 104 [2021-12-07 01:00:26,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909471665] [2021-12-07 01:00:26,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:00:26,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-07 01:00:26,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-07 01:00:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=10454, Unknown=0, NotChecked=0, Total=10712 [2021-12-07 01:00:26,608 INFO L87 Difference]: Start difference. First operand 317 states and 319 transitions. Second operand has 104 states, 104 states have (on average 6.4326923076923075) internal successors, (669), 104 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:00:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:32,745 INFO L93 Difference]: Finished difference Result 918 states and 923 transitions. [2021-12-07 01:00:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-12-07 01:00:32,745 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 6.4326923076923075) internal successors, (669), 104 states have internal predecessors, (669), 0 states have call successors, (0), 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 313 [2021-12-07 01:00:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:32,746 INFO L225 Difference]: With dead ends: 918 [2021-12-07 01:00:32,746 INFO L226 Difference]: Without dead ends: 331 [2021-12-07 01:00:32,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 563 SyntacticMatches, 20 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 18 DeprecatedPredicates, 6505 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=783, Invalid=32159, Unknown=0, NotChecked=0, Total=32942 [2021-12-07 01:00:32,748 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 174 mSDsluCounter, 10869 mSDsCounter, 0 mSdLazyCounter, 6144 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 11010 SdHoareTripleChecker+Invalid, 9412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 6144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3206 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:32,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 11010 Invalid, 9412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 6144 Invalid, 0 Unknown, 3206 Unchecked, 1.3s Time] [2021-12-07 01:00:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-12-07 01:00:32,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 325. [2021-12-07 01:00:32,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.0123839009287925) internal successors, (327), 324 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:00:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 327 transitions. [2021-12-07 01:00:32,751 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 327 transitions. Word has length 313 [2021-12-07 01:00:32,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:32,751 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 327 transitions. [2021-12-07 01:00:32,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 6.4326923076923075) internal successors, (669), 104 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:00:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 327 transitions. [2021-12-07 01:00:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-07 01:00:32,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:32,753 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:00:32,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-07 01:00:32,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-07 01:00:32,954 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:00:32,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:32,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1865586070, now seen corresponding path program 32 times [2021-12-07 01:00:32,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:32,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215851859] [2021-12-07 01:00:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:32,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2533 backedges. 435 proven. 1537 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-07 01:00:33,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:33,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215851859] [2021-12-07 01:00:33,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215851859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:33,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200313376] [2021-12-07 01:00:33,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:00:33,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:33,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:33,503 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:33,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-07 01:00:33,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:00:33,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:00:33,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-07 01:00:33,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2533 backedges. 496 proven. 1476 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-07 01:00:34,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:00:35,381 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 [2021-12-07 01:00:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2533 backedges. 496 proven. 1476 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-07 01:00:35,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200313376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:00:35,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:00:35,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 79 [2021-12-07 01:00:35,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304987679] [2021-12-07 01:00:35,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:00:35,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-07 01:00:35,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-07 01:00:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=5553, Unknown=0, NotChecked=0, Total=6320 [2021-12-07 01:00:35,515 INFO L87 Difference]: Start difference. First operand 325 states and 327 transitions. Second operand has 80 states, 79 states have (on average 6.632911392405063) internal successors, (524), 80 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:00:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:36,744 INFO L93 Difference]: Finished difference Result 344 states and 346 transitions. [2021-12-07 01:00:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-07 01:00:36,744 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 6.632911392405063) internal successors, (524), 80 states have internal predecessors, (524), 0 states have call successors, (0), 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 321 [2021-12-07 01:00:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:36,745 INFO L225 Difference]: With dead ends: 344 [2021-12-07 01:00:36,745 INFO L226 Difference]: Without dead ends: 342 [2021-12-07 01:00:36,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 598 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1854, Invalid=8246, Unknown=0, NotChecked=0, Total=10100 [2021-12-07 01:00:36,746 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 1654 mSDsluCounter, 2770 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1654 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:36,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1654 Valid, 2909 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 3031 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 01:00:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-07 01:00:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2021-12-07 01:00:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 333 states have (on average 1.012012012012012) internal successors, (337), 334 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:00:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 337 transitions. [2021-12-07 01:00:36,751 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 337 transitions. Word has length 321 [2021-12-07 01:00:36,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:36,751 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 337 transitions. [2021-12-07 01:00:36,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 6.632911392405063) internal successors, (524), 80 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:00:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 337 transitions. [2021-12-07 01:00:36,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-12-07 01:00:36,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:36,757 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:00:36,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-07 01:00:36,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:36,958 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:00:36,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:36,959 INFO L85 PathProgramCache]: Analyzing trace with hash -794659627, now seen corresponding path program 33 times [2021-12-07 01:00:36,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:36,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783268254] [2021-12-07 01:00:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:36,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:00:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 54 proven. 2091 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-07 01:00:37,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:37,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783268254] [2021-12-07 01:00:37,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783268254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:37,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126540224] [2021-12-07 01:00:37,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:00:37,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:37,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:37,780 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:37,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-07 01:01:00,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-07 01:01:00,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:01:00,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-07 01:01:00,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:01,040 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 14 treesize of output 10 [2021-12-07 01:01:03,734 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 [2021-12-07 01:01:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 54 proven. 2091 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-07 01:01:03,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:01:06,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:01:06,517 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 91 treesize of output 91 [2021-12-07 01:01:06,553 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 36 treesize of output 32 [2021-12-07 01:01:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 54 proven. 2091 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-07 01:01:06,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126540224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:01:06,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:01:06,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 47, 47] total 109 [2021-12-07 01:01:06,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447091331] [2021-12-07 01:01:06,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:01:06,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-07 01:01:06,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:06,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-07 01:01:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=11502, Unknown=0, NotChecked=0, Total=11772 [2021-12-07 01:01:06,840 INFO L87 Difference]: Start difference. First operand 335 states and 337 transitions. Second operand has 109 states, 109 states have (on average 6.486238532110092) internal successors, (707), 109 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:01:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:13,984 INFO L93 Difference]: Finished difference Result 970 states and 975 transitions. [2021-12-07 01:01:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-12-07 01:01:13,984 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 6.486238532110092) internal successors, (707), 109 states have internal predecessors, (707), 0 states have call successors, (0), 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 331 [2021-12-07 01:01:13,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:13,986 INFO L225 Difference]: With dead ends: 970 [2021-12-07 01:01:13,986 INFO L226 Difference]: Without dead ends: 349 [2021-12-07 01:01:13,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 596 SyntacticMatches, 21 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 19 DeprecatedPredicates, 7185 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=820, Invalid=35470, Unknown=0, NotChecked=0, Total=36290 [2021-12-07 01:01:13,987 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 195 mSDsluCounter, 11833 mSDsCounter, 0 mSdLazyCounter, 7038 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 11982 SdHoareTripleChecker+Invalid, 10445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 7038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3340 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:13,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 11982 Invalid, 10445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 7038 Invalid, 0 Unknown, 3340 Unchecked, 1.6s Time] [2021-12-07 01:01:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-07 01:01:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 343. [2021-12-07 01:01:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 341 states have (on average 1.0117302052785924) internal successors, (345), 342 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) [2021-12-07 01:01:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 345 transitions. [2021-12-07 01:01:13,991 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 345 transitions. Word has length 331 [2021-12-07 01:01:13,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:13,991 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 345 transitions. [2021-12-07 01:01:13,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 6.486238532110092) internal successors, (707), 109 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:01:13,991 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 345 transitions. [2021-12-07 01:01:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-12-07 01:01:13,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:13,992 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:14,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-07 01:01:14,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-07 01:01:14,193 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:01:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:14,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2102820891, now seen corresponding path program 34 times [2021-12-07 01:01:14,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:14,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650569514] [2021-12-07 01:01:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:14,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 496 proven. 1718 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-07 01:01:14,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:14,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650569514] [2021-12-07 01:01:14,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650569514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:14,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452546346] [2021-12-07 01:01:14,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:01:14,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:14,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:14,731 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:14,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-07 01:01:16,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:01:16,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:01:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-07 01:01:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 561 proven. 1653 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-07 01:01:16,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:01:17,872 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 [2021-12-07 01:01:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 561 proven. 1653 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-07 01:01:18,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452546346] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:01:18,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:01:18,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 83 [2021-12-07 01:01:18,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125594235] [2021-12-07 01:01:18,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:01:18,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-07 01:01:18,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:18,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-07 01:01:18,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=6126, Unknown=0, NotChecked=0, Total=6972 [2021-12-07 01:01:18,005 INFO L87 Difference]: Start difference. First operand 343 states and 345 transitions. Second operand has 84 states, 83 states have (on average 6.650602409638554) internal successors, (552), 84 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:01:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:19,319 INFO L93 Difference]: Finished difference Result 362 states and 364 transitions. [2021-12-07 01:01:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-07 01:01:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 6.650602409638554) internal successors, (552), 84 states have internal predecessors, (552), 0 states have call successors, (0), 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 339 [2021-12-07 01:01:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:19,320 INFO L225 Difference]: With dead ends: 362 [2021-12-07 01:01:19,320 INFO L226 Difference]: Without dead ends: 360 [2021-12-07 01:01:19,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 632 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2830 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2040, Invalid=9090, Unknown=0, NotChecked=0, Total=11130 [2021-12-07 01:01:19,321 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 2126 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 3555 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2126 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 3773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 3555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:19,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2126 Valid, 3512 Invalid, 3773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 3555 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-07 01:01:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-07 01:01:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 353. [2021-12-07 01:01:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 351 states have (on average 1.0113960113960114) internal successors, (355), 352 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:01:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 355 transitions. [2021-12-07 01:01:19,324 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 355 transitions. Word has length 339 [2021-12-07 01:01:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:19,325 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 355 transitions. [2021-12-07 01:01:19,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 6.650602409638554) internal successors, (552), 84 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:01:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 355 transitions. [2021-12-07 01:01:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-12-07 01:01:19,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:19,326 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:19,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-07 01:01:19,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-07 01:01:19,527 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:01:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:19,529 INFO L85 PathProgramCache]: Analyzing trace with hash 448061766, now seen corresponding path program 35 times [2021-12-07 01:01:19,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:19,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709609378] [2021-12-07 01:01:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:19,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 57 proven. 2340 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-07 01:01:20,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:20,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709609378] [2021-12-07 01:01:20,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709609378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:20,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426985870] [2021-12-07 01:01:20,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:01:20,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:20,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:20,431 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:20,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-07 01:01:28,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-07 01:01:28,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:01:28,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-07 01:01:28,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:29,227 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 14 treesize of output 10 [2021-12-07 01:01:32,010 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 [2021-12-07 01:01:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 57 proven. 2340 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-07 01:01:32,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:01:38,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:01:38,122 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 91 treesize of output 91 [2021-12-07 01:01:38,148 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 36 treesize of output 32 [2021-12-07 01:01:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 57 proven. 2340 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-07 01:01:38,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426985870] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:01:38,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:01:38,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 49, 49] total 114 [2021-12-07 01:01:38,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157007424] [2021-12-07 01:01:38,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:01:38,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-07 01:01:38,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:38,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-07 01:01:38,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=12600, Unknown=0, NotChecked=0, Total=12882 [2021-12-07 01:01:38,447 INFO L87 Difference]: Start difference. First operand 353 states and 355 transitions. Second operand has 114 states, 114 states have (on average 6.535087719298246) internal successors, (745), 114 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:01:46,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:46,275 INFO L93 Difference]: Finished difference Result 1022 states and 1027 transitions. [2021-12-07 01:01:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-12-07 01:01:46,276 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 6.535087719298246) internal successors, (745), 114 states have internal predecessors, (745), 0 states have call successors, (0), 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 349 [2021-12-07 01:01:46,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:46,277 INFO L225 Difference]: With dead ends: 1022 [2021-12-07 01:01:46,277 INFO L226 Difference]: Without dead ends: 367 [2021-12-07 01:01:46,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 629 SyntacticMatches, 22 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 20 DeprecatedPredicates, 7902 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=857, Invalid=38943, Unknown=0, NotChecked=0, Total=39800 [2021-12-07 01:01:46,279 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 188 mSDsluCounter, 13154 mSDsCounter, 0 mSdLazyCounter, 7795 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 13311 SdHoareTripleChecker+Invalid, 11759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 7795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3896 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:46,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 13311 Invalid, 11759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 7795 Invalid, 0 Unknown, 3896 Unchecked, 1.8s Time] [2021-12-07 01:01:46,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-07 01:01:46,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 361. [2021-12-07 01:01:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 359 states have (on average 1.011142061281337) internal successors, (363), 360 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:01:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 363 transitions. [2021-12-07 01:01:46,282 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 363 transitions. Word has length 349 [2021-12-07 01:01:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:46,282 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 363 transitions. [2021-12-07 01:01:46,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 6.535087719298246) internal successors, (745), 114 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:01:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 363 transitions. [2021-12-07 01:01:46,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-12-07 01:01:46,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:46,284 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:46,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-07 01:01:46,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:46,485 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:01:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash 400983820, now seen corresponding path program 36 times [2021-12-07 01:01:46,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:46,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311662831] [2021-12-07 01:01:46,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:46,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3173 backedges. 561 proven. 1909 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-12-07 01:01:47,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:47,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311662831] [2021-12-07 01:01:47,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311662831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:47,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497748396] [2021-12-07 01:01:47,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:01:47,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:47,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:47,176 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:47,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-07 01:03:25,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-12-07 01:03:25,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:03:25,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 152 conjunts are in the unsatisfiable core [2021-12-07 01:03:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:03:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3173 backedges. 0 proven. 3172 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:03:28,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:03:29,784 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 [2021-12-07 01:03:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3173 backedges. 630 proven. 1840 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-12-07 01:03:30,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497748396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:03:30,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:03:30,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 61, 43] total 141 [2021-12-07 01:03:30,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028595272] [2021-12-07 01:03:30,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:03:30,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2021-12-07 01:03:30,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:03:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-12-07 01:03:30,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1980, Invalid=18042, Unknown=0, NotChecked=0, Total=20022 [2021-12-07 01:03:30,851 INFO L87 Difference]: Start difference. First operand 361 states and 363 transitions. Second operand has 142 states, 141 states have (on average 6.411347517730497) internal successors, (904), 142 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:03:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:03:34,746 INFO L93 Difference]: Finished difference Result 383 states and 385 transitions. [2021-12-07 01:03:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-07 01:03:34,747 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 141 states have (on average 6.411347517730497) internal successors, (904), 142 states have internal predecessors, (904), 0 states have call successors, (0), 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 357 [2021-12-07 01:03:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:03:34,748 INFO L225 Difference]: With dead ends: 383 [2021-12-07 01:03:34,748 INFO L226 Difference]: Without dead ends: 381 [2021-12-07 01:03:34,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 613 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8039 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4325, Invalid=29347, Unknown=0, NotChecked=0, Total=33672 [2021-12-07 01:03:34,749 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 2110 mSDsluCounter, 8227 mSDsCounter, 0 mSdLazyCounter, 9573 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2110 SdHoareTripleChecker+Valid, 8394 SdHoareTripleChecker+Invalid, 9840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 9573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:03:34,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2110 Valid, 8394 Invalid, 9840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 9573 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-07 01:03:34,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-12-07 01:03:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 371. [2021-12-07 01:03:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 369 states have (on average 1.010840108401084) internal successors, (373), 370 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) [2021-12-07 01:03:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 373 transitions. [2021-12-07 01:03:34,753 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 373 transitions. Word has length 357 [2021-12-07 01:03:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:03:34,753 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 373 transitions. [2021-12-07 01:03:34,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 141 states have (on average 6.411347517730497) internal successors, (904), 142 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:03:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 373 transitions. [2021-12-07 01:03:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-12-07 01:03:34,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:03:34,754 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:03:34,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-07 01:03:34,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:03:34,956 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:03:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:03:34,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1220652791, now seen corresponding path program 37 times [2021-12-07 01:03:34,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:03:34,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110323133] [2021-12-07 01:03:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:03:34,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:03:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 60 proven. 2603 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-12-07 01:03:35,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:03:35,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110323133] [2021-12-07 01:03:35,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110323133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:03:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363920545] [2021-12-07 01:03:35,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:03:35,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:03:35,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:03:35,900 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:03:35,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-07 01:03:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:36,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-07 01:03:36,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:03:36,828 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 14 treesize of output 10 [2021-12-07 01:03:39,949 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 [2021-12-07 01:03:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 60 proven. 2603 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-12-07 01:03:39,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:03:43,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:03:43,226 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 91 treesize of output 91 [2021-12-07 01:03:43,251 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 36 treesize of output 32 [2021-12-07 01:03:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 60 proven. 2603 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-12-07 01:03:43,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363920545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:03:43,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:03:43,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 51, 51] total 119 [2021-12-07 01:03:43,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278315304] [2021-12-07 01:03:43,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:03:43,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-07 01:03:43,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:03:43,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-07 01:03:43,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=13748, Unknown=0, NotChecked=0, Total=14042 [2021-12-07 01:03:43,564 INFO L87 Difference]: Start difference. First operand 371 states and 373 transitions. Second operand has 119 states, 119 states have (on average 6.579831932773109) internal successors, (783), 119 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:03:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:03:52,444 INFO L93 Difference]: Finished difference Result 1074 states and 1079 transitions. [2021-12-07 01:03:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-12-07 01:03:52,444 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 6.579831932773109) internal successors, (783), 119 states have internal predecessors, (783), 0 states have call successors, (0), 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 367 [2021-12-07 01:03:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:03:52,446 INFO L225 Difference]: With dead ends: 1074 [2021-12-07 01:03:52,446 INFO L226 Difference]: Without dead ends: 385 [2021-12-07 01:03:52,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 662 SyntacticMatches, 23 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 21 DeprecatedPredicates, 8646 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=896, Invalid=42576, Unknown=0, NotChecked=0, Total=43472 [2021-12-07 01:03:52,447 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 213 mSDsluCounter, 14504 mSDsCounter, 0 mSdLazyCounter, 8602 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 14669 SdHoareTripleChecker+Invalid, 12691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 8602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4014 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:03:52,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 14669 Invalid, 12691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 8602 Invalid, 0 Unknown, 4014 Unchecked, 2.1s Time] [2021-12-07 01:03:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-12-07 01:03:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 379. [2021-12-07 01:03:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 377 states have (on average 1.0106100795755968) internal successors, (381), 378 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:03:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 381 transitions. [2021-12-07 01:03:52,451 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 381 transitions. Word has length 367 [2021-12-07 01:03:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:03:52,451 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 381 transitions. [2021-12-07 01:03:52,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 6.579831932773109) internal successors, (783), 119 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:03:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 381 transitions. [2021-12-07 01:03:52,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-12-07 01:03:52,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:03:52,453 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:03:52,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-07 01:03:52,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-12-07 01:03:52,654 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:03:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:03:52,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1839771843, now seen corresponding path program 38 times [2021-12-07 01:03:52,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:03:52,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779239464] [2021-12-07 01:03:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:03:52,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:03:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3520 backedges. 630 proven. 2110 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-12-07 01:03:53,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:03:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779239464] [2021-12-07 01:03:53,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779239464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:03:53,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645706369] [2021-12-07 01:03:53,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:03:53,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:03:53,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:03:53,353 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:03:53,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-07 01:03:53,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:03:53,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:03:53,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-07 01:03:53,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:03:53,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:03:53,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 01:03:53,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:03:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3520 backedges. 703 proven. 2037 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-12-07 01:03:55,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:03:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3520 backedges. 780 proven. 1960 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-12-07 01:03:58,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645706369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:03:58,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:03:58,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 129 [2021-12-07 01:03:58,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112823575] [2021-12-07 01:03:58,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:03:58,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-12-07 01:03:58,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:03:58,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-12-07 01:03:58,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1546, Invalid=15224, Unknown=0, NotChecked=0, Total=16770 [2021-12-07 01:03:58,498 INFO L87 Difference]: Start difference. First operand 379 states and 381 transitions. Second operand has 130 states, 129 states have (on average 6.844961240310077) internal successors, (883), 130 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:01,508 INFO L93 Difference]: Finished difference Result 398 states and 400 transitions. [2021-12-07 01:04:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-07 01:04:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 6.844961240310077) internal successors, (883), 130 states have internal predecessors, (883), 0 states have call successors, (0), 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 375 [2021-12-07 01:04:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:01,510 INFO L225 Difference]: With dead ends: 398 [2021-12-07 01:04:01,510 INFO L226 Difference]: Without dead ends: 396 [2021-12-07 01:04:01,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 663 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6880 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4618, Invalid=25138, Unknown=0, NotChecked=0, Total=29756 [2021-12-07 01:04:01,511 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 2780 mSDsluCounter, 5091 mSDsCounter, 0 mSdLazyCounter, 5619 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2780 SdHoareTripleChecker+Valid, 5250 SdHoareTripleChecker+Invalid, 5913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 5619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:01,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2780 Valid, 5250 Invalid, 5913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 5619 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-07 01:04:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-07 01:04:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 389. [2021-12-07 01:04:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 387 states have (on average 1.0103359173126616) internal successors, (391), 388 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 391 transitions. [2021-12-07 01:04:01,515 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 391 transitions. Word has length 375 [2021-12-07 01:04:01,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:01,515 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 391 transitions. [2021-12-07 01:04:01,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 129 states have (on average 6.844961240310077) internal successors, (883), 130 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:01,515 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 391 transitions. [2021-12-07 01:04:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-12-07 01:04:01,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:01,517 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:04:01,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-07 01:04:01,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-07 01:04:01,718 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:04:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:01,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1566659096, now seen corresponding path program 39 times [2021-12-07 01:04:01,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382134197] [2021-12-07 01:04:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:01,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3723 backedges. 63 proven. 2880 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-12-07 01:04:02,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:02,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382134197] [2021-12-07 01:04:02,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382134197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:04:02,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599436329] [2021-12-07 01:04:02,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:04:02,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:04:02,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:04:02,712 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:04:02,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-07 01:04:23,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-07 01:04:23,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:04:23,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1458 conjuncts, 196 conjunts are in the unsatisfiable core [2021-12-07 01:04:23,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:04:23,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:04:24,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:04:24,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:04:27,404 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 [2021-12-07 01:04:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3723 backedges. 63 proven. 2880 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-12-07 01:04:27,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:04:27,704 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4437 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4437) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 20)) 0)) is different from false [2021-12-07 01:04:27,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:04:27,707 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:04:27,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:04:27,710 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 37 treesize of output 37 [2021-12-07 01:04:27,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:04:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3723 backedges. 63 proven. 2880 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-12-07 01:04:28,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599436329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:04:28,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:04:28,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 50] total 98 [2021-12-07 01:04:28,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546882457] [2021-12-07 01:04:28,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:04:28,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-07 01:04:28,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-07 01:04:28,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=9061, Unknown=1, NotChecked=190, Total=9506 [2021-12-07 01:04:28,429 INFO L87 Difference]: Start difference. First operand 389 states and 391 transitions. Second operand has 98 states, 98 states have (on average 6.326530612244898) internal successors, (620), 98 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:30,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:30,319 INFO L93 Difference]: Finished difference Result 692 states and 695 transitions. [2021-12-07 01:04:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-07 01:04:30,320 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 6.326530612244898) internal successors, (620), 98 states have internal predecessors, (620), 0 states have call successors, (0), 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 385 [2021-12-07 01:04:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:30,321 INFO L225 Difference]: With dead ends: 692 [2021-12-07 01:04:30,321 INFO L226 Difference]: Without dead ends: 396 [2021-12-07 01:04:30,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 719 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2107 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=397, Invalid=14368, Unknown=1, NotChecked=240, Total=15006 [2021-12-07 01:04:30,322 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 85 mSDsluCounter, 11355 mSDsCounter, 0 mSdLazyCounter, 3389 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 11515 SdHoareTripleChecker+Invalid, 4570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1157 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:30,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 11515 Invalid, 4570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3389 Invalid, 0 Unknown, 1157 Unchecked, 0.8s Time] [2021-12-07 01:04:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-07 01:04:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 393. [2021-12-07 01:04:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 391 states have (on average 1.010230179028133) internal successors, (395), 392 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 395 transitions. [2021-12-07 01:04:30,326 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 395 transitions. Word has length 385 [2021-12-07 01:04:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:30,326 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 395 transitions. [2021-12-07 01:04:30,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 6.326530612244898) internal successors, (620), 98 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 395 transitions. [2021-12-07 01:04:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-12-07 01:04:30,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:30,328 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:04:30,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-07 01:04:30,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:04:30,528 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:04:30,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:30,530 INFO L85 PathProgramCache]: Analyzing trace with hash -288237973, now seen corresponding path program 40 times [2021-12-07 01:04:30,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:30,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096617963] [2021-12-07 01:04:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:30,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3804 backedges. 703 proven. 2321 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-12-07 01:04:31,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:31,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096617963] [2021-12-07 01:04:31,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096617963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:04:31,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807697799] [2021-12-07 01:04:31,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:04:31,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:04:31,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:04:31,344 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:04:31,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-07 01:04:32,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:04:32,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:04:32,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-07 01:04:32,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:04:32,426 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:04:32,426 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:04:33,528 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 13 treesize of output 9 [2021-12-07 01:04:35,870 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 13 treesize of output 9 [2021-12-07 01:04:36,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:04:36,262 INFO L354 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2021-12-07 01:04:36,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2021-12-07 01:04:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3804 backedges. 2043 proven. 900 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-12-07 01:04:36,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:04:41,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:04:41,029 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 87 treesize of output 87 [2021-12-07 01:04:41,040 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 30 treesize of output 28 [2021-12-07 01:04:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3804 backedges. 1887 proven. 1056 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-12-07 01:04:44,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807697799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:04:44,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:04:44,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 54, 54] total 149 [2021-12-07 01:04:44,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111304173] [2021-12-07 01:04:44,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:04:44,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-12-07 01:04:44,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:44,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-12-07 01:04:44,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1954, Invalid=20098, Unknown=0, NotChecked=0, Total=22052 [2021-12-07 01:04:44,183 INFO L87 Difference]: Start difference. First operand 393 states and 395 transitions. Second operand has 149 states, 149 states have (on average 6.1610738255033555) internal successors, (918), 149 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:48,766 INFO L93 Difference]: Finished difference Result 633 states and 635 transitions. [2021-12-07 01:04:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-12-07 01:04:48,766 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 6.1610738255033555) internal successors, (918), 149 states have internal predecessors, (918), 0 states have call successors, (0), 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 389 [2021-12-07 01:04:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:48,768 INFO L225 Difference]: With dead ends: 633 [2021-12-07 01:04:48,768 INFO L226 Difference]: Without dead ends: 417 [2021-12-07 01:04:48,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14062 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=5325, Invalid=45525, Unknown=0, NotChecked=0, Total=50850 [2021-12-07 01:04:48,771 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 775 mSDsluCounter, 6993 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 7154 SdHoareTripleChecker+Invalid, 3905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:48,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 7154 Invalid, 3905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 3253 Invalid, 0 Unknown, 502 Unchecked, 0.9s Time] [2021-12-07 01:04:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-12-07 01:04:48,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 407. [2021-12-07 01:04:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 405 states have (on average 1.0098765432098766) internal successors, (409), 406 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 409 transitions. [2021-12-07 01:04:48,781 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 409 transitions. Word has length 389 [2021-12-07 01:04:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:48,781 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 409 transitions. [2021-12-07 01:04:48,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 6.1610738255033555) internal successors, (918), 149 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:04:48,782 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 409 transitions. [2021-12-07 01:04:48,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-12-07 01:04:48,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:48,783 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:04:48,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-07 01:04:48,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-12-07 01:04:48,984 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:04:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1169838567, now seen corresponding path program 41 times [2021-12-07 01:04:48,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:48,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323885652] [2021-12-07 01:04:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:48,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:04:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 66 proven. 3171 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-12-07 01:04:50,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:50,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323885652] [2021-12-07 01:04:50,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323885652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:04:50,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141171288] [2021-12-07 01:04:50,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:04:50,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:04:50,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:04:50,067 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:04:50,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-07 01:05:15,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-07 01:05:15,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:05:15,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1524 conjuncts, 153 conjunts are in the unsatisfiable core [2021-12-07 01:05:15,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:05:16,372 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 14 treesize of output 10 [2021-12-07 01:05:19,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:05:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 66 proven. 3171 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-12-07 01:05:20,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:05:23,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:05:23,871 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 91 treesize of output 91 [2021-12-07 01:05:23,906 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 36 treesize of output 32 [2021-12-07 01:05:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 66 proven. 3171 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-12-07 01:05:24,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141171288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:05:24,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:05:24,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 55, 55] total 129 [2021-12-07 01:05:24,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518079193] [2021-12-07 01:05:24,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:05:24,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-07 01:05:24,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:24,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-07 01:05:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=16194, Unknown=0, NotChecked=0, Total=16512 [2021-12-07 01:05:24,242 INFO L87 Difference]: Start difference. First operand 407 states and 409 transitions. Second operand has 129 states, 129 states have (on average 6.658914728682171) internal successors, (859), 129 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:34,471 INFO L93 Difference]: Finished difference Result 1178 states and 1183 transitions. [2021-12-07 01:05:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-12-07 01:05:34,471 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 6.658914728682171) internal successors, (859), 129 states have internal predecessors, (859), 0 states have call successors, (0), 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 403 [2021-12-07 01:05:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:34,473 INFO L225 Difference]: With dead ends: 1178 [2021-12-07 01:05:34,473 INFO L226 Difference]: Without dead ends: 421 [2021-12-07 01:05:34,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 728 SyntacticMatches, 25 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 23 DeprecatedPredicates, 10245 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=968, Invalid=50334, Unknown=0, NotChecked=0, Total=51302 [2021-12-07 01:05:34,475 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 221 mSDsluCounter, 17282 mSDsCounter, 0 mSdLazyCounter, 9591 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 17464 SdHoareTripleChecker+Invalid, 14238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 9591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4567 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:34,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 17464 Invalid, 14238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 9591 Invalid, 0 Unknown, 4567 Unchecked, 2.2s Time] [2021-12-07 01:05:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-12-07 01:05:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 415. [2021-12-07 01:05:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 413 states have (on average 1.0096852300242132) internal successors, (417), 414 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 417 transitions. [2021-12-07 01:05:34,479 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 417 transitions. Word has length 403 [2021-12-07 01:05:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:34,479 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 417 transitions. [2021-12-07 01:05:34,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 6.658914728682171) internal successors, (859), 129 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:05:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 417 transitions. [2021-12-07 01:05:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-12-07 01:05:34,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:34,481 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:05:34,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-07 01:05:34,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:05:34,682 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-07 01:05:34,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:34,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1526096735, now seen corresponding path program 42 times [2021-12-07 01:05:34,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:34,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407072265] [2021-12-07 01:05:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:34,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4268 backedges. 780 proven. 2542 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-12-07 01:05:35,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:35,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407072265] [2021-12-07 01:05:35,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407072265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:05:35,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694816973] [2021-12-07 01:05:35,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:05:35,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:05:35,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:05:35,512 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:05:35,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170aaf93-39da-48c4-8d66-7663b9a8fad1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process