./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0 --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 d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:01:16,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:01:16,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:01:16,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:01:16,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:01:16,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:01:16,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:01:16,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:01:16,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:01:16,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:01:16,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:01:16,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:01:16,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:01:16,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:01:16,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:01:16,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:01:16,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:01:16,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:01:16,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:01:16,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:01:16,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:01:16,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:01:16,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:01:16,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:01:16,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:01:16,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:01:16,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:01:16,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:01:16,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:01:16,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:01:16,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:01:16,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:01:16,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:01:16,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:01:16,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:01:16,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:01:16,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:01:16,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:01:16,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:01:16,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:01:16,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:01:16,547 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-22 15:01:16,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:01:16,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:01:16,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:01:16,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:01:16,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:01:16,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:01:16,581 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:01:16,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:01:16,582 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:01:16,582 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 15:01:16,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:01:16,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:01:16,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:01:16,583 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 15:01:16,583 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 15:01:16,584 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 15:01:16,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:01:16,584 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 15:01:16,584 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:01:16,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:01:16,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:01:16,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:01:16,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:01:16,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:01:16,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:01:16,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:01:16,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:01:16,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:01:16,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:01:16,588 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_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2021-11-22 15:01:16,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:01:16,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:01:16,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:01:16,931 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:01:16,932 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:01:16,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2021-11-22 15:01:17,008 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/data/2dc1f3509/0c709eb678344cb9b9c355f4df9a408a/FLAG7bebed9b6 [2021-11-22 15:01:17,672 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:01:17,673 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2021-11-22 15:01:17,688 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/data/2dc1f3509/0c709eb678344cb9b9c355f4df9a408a/FLAG7bebed9b6 [2021-11-22 15:01:17,946 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/data/2dc1f3509/0c709eb678344cb9b9c355f4df9a408a [2021-11-22 15:01:17,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:01:17,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:01:17,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:01:17,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:01:17,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:01:17,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:01:17" (1/1) ... [2021-11-22 15:01:17,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dca1b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:17, skipping insertion in model container [2021-11-22 15:01:17,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:01:17" (1/1) ... [2021-11-22 15:01:17,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:01:18,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:01:18,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:01:18,513 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:01:18,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:01:18,630 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:01:18,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18 WrapperNode [2021-11-22 15:01:18,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:01:18,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:01:18,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:01:18,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:01:18,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18" (1/1) ... [2021-11-22 15:01:18,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18" (1/1) ... [2021-11-22 15:01:18,691 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2021-11-22 15:01:18,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:01:18,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:01:18,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:01:18,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:01:18,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18" (1/1) ... [2021-11-22 15:01:18,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18" (1/1) ... [2021-11-22 15:01:18,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18" (1/1) ... [2021-11-22 15:01:18,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18" (1/1) ... [2021-11-22 15:01:18,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18" (1/1) ... [2021-11-22 15:01:18,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18" (1/1) ... [2021-11-22 15:01:18,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18" (1/1) ... [2021-11-22 15:01:18,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:01:18,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:01:18,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:01:18,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:01:18,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18" (1/1) ... [2021-11-22 15:01:18,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:01:18,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:18,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:01:18,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:01:18,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:01:18,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:01:18,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:01:18,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:01:18,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:01:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:01:19,049 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:01:19,052 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:01:19,505 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:01:19,514 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:01:19,514 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-22 15:01:19,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:01:19 BoogieIcfgContainer [2021-11-22 15:01:19,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:01:19,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:01:19,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:01:19,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:01:19,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:01:17" (1/3) ... [2021-11-22 15:01:19,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9b84d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:01:19, skipping insertion in model container [2021-11-22 15:01:19,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:01:18" (2/3) ... [2021-11-22 15:01:19,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9b84d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:01:19, skipping insertion in model container [2021-11-22 15:01:19,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:01:19" (3/3) ... [2021-11-22 15:01:19,527 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2021-11-22 15:01:19,534 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:01:19,535 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-22 15:01:19,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:01:19,603 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 15:01:19,603 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-22 15:01:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 15:01:19,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:19,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:19,669 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:19,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031117, now seen corresponding path program 1 times [2021-11-22 15:01:19,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:19,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750832471] [2021-11-22 15:01:19,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:19,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:19,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750832471] [2021-11-22 15:01:19,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750832471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:19,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:19,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:01:19,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611228397] [2021-11-22 15:01:19,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:19,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:01:19,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:19,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:01:19,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:01:19,945 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 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) 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) [2021-11-22 15:01:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:20,067 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-22 15:01:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:01:20,070 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 [2021-11-22 15:01:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:20,082 INFO L225 Difference]: With dead ends: 54 [2021-11-22 15:01:20,082 INFO L226 Difference]: Without dead ends: 51 [2021-11-22 15:01:20,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:01:20,091 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:20,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-22 15:01:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-22 15:01:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.84375) internal successors, (59), 50 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) [2021-11-22 15:01:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-11-22 15:01:20,146 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2021-11-22 15:01:20,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:20,147 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-11-22 15:01:20,147 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) [2021-11-22 15:01:20,147 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-11-22 15:01:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 15:01:20,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:20,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:20,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:01:20,151 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:20,158 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2021-11-22 15:01:20,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:20,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224101091] [2021-11-22 15:01:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:20,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:20,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:20,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224101091] [2021-11-22 15:01:20,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224101091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:20,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:20,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:01:20,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120929695] [2021-11-22 15:01:20,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:20,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:01:20,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:20,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:01:20,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:01:20,309 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:20,448 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-22 15:01:20,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:01:20,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-22 15:01:20,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:20,452 INFO L225 Difference]: With dead ends: 54 [2021-11-22 15:01:20,456 INFO L226 Difference]: Without dead ends: 51 [2021-11-22 15:01:20,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:01:20,464 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:20,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-22 15:01:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-22 15:01:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.8125) internal successors, (58), 50 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) [2021-11-22 15:01:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-11-22 15:01:20,476 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 8 [2021-11-22 15:01:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:20,477 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-11-22 15:01:20,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-11-22 15:01:20,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 15:01:20,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:20,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:20,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:01:20,479 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:20,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:20,481 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2021-11-22 15:01:20,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:20,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156814786] [2021-11-22 15:01:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:20,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:20,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:20,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156814786] [2021-11-22 15:01:20,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156814786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:20,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:20,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:01:20,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415739988] [2021-11-22 15:01:20,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:20,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:01:20,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:20,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:01:20,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:01:20,625 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:20,687 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-22 15:01:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:01:20,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-22 15:01:20,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:20,691 INFO L225 Difference]: With dead ends: 49 [2021-11-22 15:01:20,691 INFO L226 Difference]: Without dead ends: 49 [2021-11-22 15:01:20,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:01:20,699 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 41 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 [2021-11-22 15:01:20,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:01:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-22 15:01:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-22 15:01:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.75) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-22 15:01:20,708 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 8 [2021-11-22 15:01:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:20,714 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-22 15:01:20,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-22 15:01:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 15:01:20,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:20,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:20,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:01:20,716 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:20,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:20,719 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2021-11-22 15:01:20,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:20,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327893224] [2021-11-22 15:01:20,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:20,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:20,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:20,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327893224] [2021-11-22 15:01:20,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327893224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:20,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:20,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:01:20,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011327276] [2021-11-22 15:01:20,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:20,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:01:20,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:20,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:01:20,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:01:20,913 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:21,083 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2021-11-22 15:01:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:01:21,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-22 15:01:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:21,090 INFO L225 Difference]: With dead ends: 91 [2021-11-22 15:01:21,090 INFO L226 Difference]: Without dead ends: 91 [2021-11-22 15:01:21,091 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 [2021-11-22 15:01:21,101 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 143 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:21,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 96 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-22 15:01:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2021-11-22 15:01:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 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) [2021-11-22 15:01:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-11-22 15:01:21,110 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 8 [2021-11-22 15:01:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:21,111 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-11-22 15:01:21,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-11-22 15:01:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 15:01:21,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:21,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:21,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:01:21,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:21,118 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2021-11-22 15:01:21,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:21,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231246761] [2021-11-22 15:01:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:21,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:21,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:21,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231246761] [2021-11-22 15:01:21,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231246761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:21,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:21,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:01:21,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825825058] [2021-11-22 15:01:21,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:21,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:01:21,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:01:21,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:01:21,286 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2021-11-22 15:01:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:21,376 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-11-22 15:01:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:01:21,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 [2021-11-22 15:01:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:21,381 INFO L225 Difference]: With dead ends: 50 [2021-11-22 15:01:21,382 INFO L226 Difference]: Without dead ends: 50 [2021-11-22 15:01:21,383 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 [2021-11-22 15:01:21,384 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 142 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:21,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 37 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-22 15:01:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-22 15:01:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.7058823529411764) 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) [2021-11-22 15:01:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-22 15:01:21,406 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 10 [2021-11-22 15:01:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:21,407 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-22 15:01:21,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2021-11-22 15:01:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-22 15:01:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 15:01:21,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:21,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:21,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 15:01:21,409 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash -118766563, now seen corresponding path program 1 times [2021-11-22 15:01:21,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:21,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767498528] [2021-11-22 15:01:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:21,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:21,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:21,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767498528] [2021-11-22 15:01:21,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767498528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:21,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:21,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:01:21,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111313847] [2021-11-22 15:01:21,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:21,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:01:21,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:01:21,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:01:21,475 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.5) 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) [2021-11-22 15:01:21,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:21,501 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2021-11-22 15:01:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:01:21,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) 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 [2021-11-22 15:01:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:21,503 INFO L225 Difference]: With dead ends: 91 [2021-11-22 15:01:21,503 INFO L226 Difference]: Without dead ends: 91 [2021-11-22 15:01:21,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:01:21,504 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 41 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:21,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:01:21,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-22 15:01:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2021-11-22 15:01:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-11-22 15:01:21,511 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2021-11-22 15:01:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:21,512 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-11-22 15:01:21,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) 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) [2021-11-22 15:01:21,512 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-11-22 15:01:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 15:01:21,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:21,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:21,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:01:21,514 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240799, now seen corresponding path program 1 times [2021-11-22 15:01:21,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:21,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457238788] [2021-11-22 15:01:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:21,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:21,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:21,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457238788] [2021-11-22 15:01:21,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457238788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:21,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:21,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:01:21,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829292426] [2021-11-22 15:01:21,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:21,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:01:21,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:21,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:01:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:01:21,541 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2021-11-22 15:01:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:21,569 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-11-22 15:01:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:01:21,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 [2021-11-22 15:01:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:21,570 INFO L225 Difference]: With dead ends: 58 [2021-11-22 15:01:21,571 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 15:01:21,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:01:21,572 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 40 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 40 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 [2021-11-22 15:01:21,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:01:21,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 15:01:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-22 15:01:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-11-22 15:01:21,578 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 10 [2021-11-22 15:01:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:21,578 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-11-22 15:01:21,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2021-11-22 15:01:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-11-22 15:01:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 15:01:21,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:21,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:21,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:01:21,580 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:21,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240800, now seen corresponding path program 1 times [2021-11-22 15:01:21,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:21,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534220982] [2021-11-22 15:01:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:21,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:21,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:21,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534220982] [2021-11-22 15:01:21,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534220982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:21,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:21,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:01:21,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123393569] [2021-11-22 15:01:21,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:21,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:01:21,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:01:21,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:01:21,638 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-11-22 15:01:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:21,738 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2021-11-22 15:01:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:01:21,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2021-11-22 15:01:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:21,740 INFO L225 Difference]: With dead ends: 125 [2021-11-22 15:01:21,740 INFO L226 Difference]: Without dead ends: 125 [2021-11-22 15:01:21,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:01:21,741 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 122 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:21,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 157 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-22 15:01:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 58. [2021-11-22 15:01:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-11-22 15:01:21,747 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 10 [2021-11-22 15:01:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:21,747 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-11-22 15:01:21,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-11-22 15:01:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-11-22 15:01:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:01:21,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:21,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:21,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 15:01:21,749 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash 613202235, now seen corresponding path program 1 times [2021-11-22 15:01:21,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:21,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286218881] [2021-11-22 15:01:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:21,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:21,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:21,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286218881] [2021-11-22 15:01:21,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286218881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:21,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:21,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:01:21,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856253982] [2021-11-22 15:01:21,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:21,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:01:21,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:21,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:01:21,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:01:21,792 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:21,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:21,834 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-11-22 15:01:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:01:21,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2021-11-22 15:01:21,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:21,835 INFO L225 Difference]: With dead ends: 57 [2021-11-22 15:01:21,835 INFO L226 Difference]: Without dead ends: 57 [2021-11-22 15:01:21,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:01:21,838 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 86 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 36 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 [2021-11-22 15:01:21,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:01:21,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-22 15:01:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-22 15:01:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.5681818181818181) 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) [2021-11-22 15:01:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-11-22 15:01:21,847 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 11 [2021-11-22 15:01:21,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:21,848 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-11-22 15:01:21,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:21,848 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-11-22 15:01:21,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 15:01:21,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:21,850 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:21,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 15:01:21,850 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2021-11-22 15:01:21,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:21,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748018188] [2021-11-22 15:01:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:21,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:21,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:21,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748018188] [2021-11-22 15:01:21,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748018188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:21,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531847523] [2021-11-22 15:01:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:22,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:22,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:22,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:22,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:01:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:22,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 15:01:22,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:22,216 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:01:22,217 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 18 treesize of output 19 [2021-11-22 15:01:22,224 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 13 [2021-11-22 15:01:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:22,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:22,760 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 35 treesize of output 33 [2021-11-22 15:01:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:22,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531847523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:22,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:22,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-22 15:01:22,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846828466] [2021-11-22 15:01:22,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:22,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 15:01:22,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:22,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 15:01:22,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:01:22,784 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:23,055 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-11-22 15:01:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:01:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 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 12 [2021-11-22 15:01:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:23,057 INFO L225 Difference]: With dead ends: 128 [2021-11-22 15:01:23,058 INFO L226 Difference]: Without dead ends: 128 [2021-11-22 15:01:23,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-22 15:01:23,059 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 162 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:23,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 261 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:01:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-22 15:01:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 53. [2021-11-22 15:01:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-11-22 15:01:23,072 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 12 [2021-11-22 15:01:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:23,073 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-11-22 15:01:23,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-11-22 15:01:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 15:01:23,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:23,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:23,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:01:23,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:23,301 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:23,301 INFO L85 PathProgramCache]: Analyzing trace with hash 876828511, now seen corresponding path program 1 times [2021-11-22 15:01:23,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:23,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733648804] [2021-11-22 15:01:23,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:23,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:23,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733648804] [2021-11-22 15:01:23,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733648804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:23,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:23,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:01:23,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154321237] [2021-11-22 15:01:23,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:23,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:01:23,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:01:23,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:01:23,350 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:23,395 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-11-22 15:01:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:01:23,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-22 15:01:23,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:23,397 INFO L225 Difference]: With dead ends: 49 [2021-11-22 15:01:23,398 INFO L226 Difference]: Without dead ends: 49 [2021-11-22 15:01:23,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:01:23,399 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:23,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:01:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-22 15:01:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-22 15:01:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 48 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) [2021-11-22 15:01:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-11-22 15:01:23,404 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 13 [2021-11-22 15:01:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:23,404 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-11-22 15:01:23,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-11-22 15:01:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 15:01:23,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:23,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:23,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 15:01:23,408 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:23,409 INFO L85 PathProgramCache]: Analyzing trace with hash 876828512, now seen corresponding path program 1 times [2021-11-22 15:01:23,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:23,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098592328] [2021-11-22 15:01:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:23,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:23,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:23,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098592328] [2021-11-22 15:01:23,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098592328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:23,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:23,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:01:23,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344522127] [2021-11-22 15:01:23,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:23,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:01:23,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:23,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:01:23,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:01:23,519 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:23,634 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2021-11-22 15:01:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:01:23,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-22 15:01:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:23,635 INFO L225 Difference]: With dead ends: 72 [2021-11-22 15:01:23,635 INFO L226 Difference]: Without dead ends: 72 [2021-11-22 15:01:23,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:01:23,637 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 185 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:23,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 62 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:23,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-22 15:01:23,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-11-22 15:01:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 59 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-11-22 15:01:23,645 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2021-11-22 15:01:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:23,646 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-11-22 15:01:23,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-11-22 15:01:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 15:01:23,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:23,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:23,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 15:01:23,649 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:23,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2021-11-22 15:01:23,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:23,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947792161] [2021-11-22 15:01:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:23,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:23,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:23,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947792161] [2021-11-22 15:01:23,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947792161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:23,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:23,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:01:23,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412601873] [2021-11-22 15:01:23,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:23,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:01:23,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:23,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:01:23,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:01:23,707 INFO L87 Difference]: Start difference. First operand 60 states and 76 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) [2021-11-22 15:01:23,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:23,797 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-11-22 15:01:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:01:23,797 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 [2021-11-22 15:01:23,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:23,800 INFO L225 Difference]: With dead ends: 99 [2021-11-22 15:01:23,800 INFO L226 Difference]: Without dead ends: 99 [2021-11-22 15:01:23,800 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 [2021-11-22 15:01:23,802 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 98 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:23,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 76 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-22 15:01:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2021-11-22 15:01:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.462962962962963) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2021-11-22 15:01:23,807 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 14 [2021-11-22 15:01:23,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:23,809 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2021-11-22 15:01:23,810 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) [2021-11-22 15:01:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2021-11-22 15:01:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 15:01:23,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:23,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:23,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 15:01:23,815 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:23,816 INFO L85 PathProgramCache]: Analyzing trace with hash 818610617, now seen corresponding path program 1 times [2021-11-22 15:01:23,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:23,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191940703] [2021-11-22 15:01:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:23,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:23,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191940703] [2021-11-22 15:01:23,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191940703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765069159] [2021-11-22 15:01:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:23,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:23,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:23,949 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:23,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:01:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 15:01:24,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:24,102 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:01:24,103 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 26 treesize of output 27 [2021-11-22 15:01:24,108 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 24 treesize of output 22 [2021-11-22 15:01:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:24,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:24,584 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 [2021-11-22 15:01:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:24,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765069159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:24,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:24,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-22 15:01:24,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895388181] [2021-11-22 15:01:24,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:24,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 15:01:24,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:24,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 15:01:24,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-22 15:01:24,605 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:24,787 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2021-11-22 15:01:24,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:01:24,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 15:01:24,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:24,789 INFO L225 Difference]: With dead ends: 85 [2021-11-22 15:01:24,789 INFO L226 Difference]: Without dead ends: 85 [2021-11-22 15:01:24,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-22 15:01:24,790 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:24,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 386 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-11-22 15:01:24,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-22 15:01:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2021-11-22 15:01:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 72 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2021-11-22 15:01:24,794 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 15 [2021-11-22 15:01:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:24,794 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2021-11-22 15:01:24,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2021-11-22 15:01:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 15:01:24,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:24,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:24,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:01:25,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-22 15:01:25,012 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:25,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash 705742569, now seen corresponding path program 1 times [2021-11-22 15:01:25,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:25,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540596591] [2021-11-22 15:01:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:25,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:25,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:25,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540596591] [2021-11-22 15:01:25,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540596591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:25,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:25,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:01:25,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254026973] [2021-11-22 15:01:25,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:25,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:01:25,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:25,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:01:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:01:25,066 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:25,141 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2021-11-22 15:01:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:01:25,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 15:01:25,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:25,142 INFO L225 Difference]: With dead ends: 73 [2021-11-22 15:01:25,143 INFO L226 Difference]: Without dead ends: 73 [2021-11-22 15:01:25,145 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 [2021-11-22 15:01:25,146 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:25,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 77 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:25,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-22 15:01:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-11-22 15:01:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 65 states have (on average 1.4) internal successors, (91), 71 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2021-11-22 15:01:25,151 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 17 [2021-11-22 15:01:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:25,151 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2021-11-22 15:01:25,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2021-11-22 15:01:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 15:01:25,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:25,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:25,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 15:01:25,154 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:25,154 INFO L85 PathProgramCache]: Analyzing trace with hash 705742570, now seen corresponding path program 1 times [2021-11-22 15:01:25,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:25,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30123613] [2021-11-22 15:01:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:25,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:25,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:25,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30123613] [2021-11-22 15:01:25,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30123613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:25,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:25,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 15:01:25,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105215148] [2021-11-22 15:01:25,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:25,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:01:25,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:25,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:01:25,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:01:25,250 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:25,349 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2021-11-22 15:01:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:01:25,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 15:01:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:25,351 INFO L225 Difference]: With dead ends: 93 [2021-11-22 15:01:25,352 INFO L226 Difference]: Without dead ends: 93 [2021-11-22 15:01:25,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:01:25,353 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 133 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:25,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 84 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-22 15:01:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2021-11-22 15:01:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 70 states have (on average 1.4) internal successors, (98), 76 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2021-11-22 15:01:25,358 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 17 [2021-11-22 15:01:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:25,358 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2021-11-22 15:01:25,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2021-11-22 15:01:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 15:01:25,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:25,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:25,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 15:01:25,360 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:25,361 INFO L85 PathProgramCache]: Analyzing trace with hash 705788370, now seen corresponding path program 2 times [2021-11-22 15:01:25,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:25,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165720560] [2021-11-22 15:01:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:25,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:25,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:25,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165720560] [2021-11-22 15:01:25,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165720560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:25,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:25,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 15:01:25,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634079752] [2021-11-22 15:01:25,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:25,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:01:25,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:01:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:01:25,505 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:25,881 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2021-11-22 15:01:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:01:25,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 15:01:25,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:25,883 INFO L225 Difference]: With dead ends: 141 [2021-11-22 15:01:25,883 INFO L226 Difference]: Without dead ends: 141 [2021-11-22 15:01:25,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:01:25,884 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 148 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:25,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 195 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-22 15:01:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 76. [2021-11-22 15:01:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 69 states have (on average 1.391304347826087) internal successors, (96), 75 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2021-11-22 15:01:25,888 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 17 [2021-11-22 15:01:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:25,889 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2021-11-22 15:01:25,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2021-11-22 15:01:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 15:01:25,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:25,889 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:25,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 15:01:25,890 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:25,890 INFO L85 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2021-11-22 15:01:25,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:25,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780750496] [2021-11-22 15:01:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:25,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:25,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:25,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780750496] [2021-11-22 15:01:25,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780750496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:25,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626647387] [2021-11-22 15:01:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:25,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:25,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:25,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:25,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:01:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:26,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 15:01:26,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:26,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:26,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626647387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:26,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:26,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-22 15:01:26,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028526292] [2021-11-22 15:01:26,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:26,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 15:01:26,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:26,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 15:01:26,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-22 15:01:26,294 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:26,567 INFO L93 Difference]: Finished difference Result 254 states and 319 transitions. [2021-11-22 15:01:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 15:01:26,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-22 15:01:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:26,570 INFO L225 Difference]: With dead ends: 254 [2021-11-22 15:01:26,570 INFO L226 Difference]: Without dead ends: 254 [2021-11-22 15:01:26,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-11-22 15:01:26,571 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 547 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:26,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 257 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-22 15:01:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 85. [2021-11-22 15:01:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 78 states have (on average 1.3717948717948718) internal successors, (107), 84 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2021-11-22 15:01:26,581 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 18 [2021-11-22 15:01:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:26,581 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2021-11-22 15:01:26,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2021-11-22 15:01:26,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 15:01:26,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:26,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:26,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:01:26,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 15:01:26,799 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:26,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash -795987946, now seen corresponding path program 1 times [2021-11-22 15:01:26,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:26,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898465181] [2021-11-22 15:01:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:26,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:26,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:26,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898465181] [2021-11-22 15:01:26,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898465181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:26,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842939846] [2021-11-22 15:01:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:26,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:26,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:26,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:26,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:01:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:26,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 15:01:26,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:27,008 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:01:27,009 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 18 treesize of output 19 [2021-11-22 15:01:27,013 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 13 [2021-11-22 15:01:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:27,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:27,425 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 [2021-11-22 15:01:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:27,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842939846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:27,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:27,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2021-11-22 15:01:27,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997772448] [2021-11-22 15:01:27,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:27,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 15:01:27,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 15:01:27,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-22 15:01:27,461 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:28,212 INFO L93 Difference]: Finished difference Result 197 states and 245 transitions. [2021-11-22 15:01:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 15:01:28,213 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-22 15:01:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:28,214 INFO L225 Difference]: With dead ends: 197 [2021-11-22 15:01:28,214 INFO L226 Difference]: Without dead ends: 197 [2021-11-22 15:01:28,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2021-11-22 15:01:28,216 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 954 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:28,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 427 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:01:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-22 15:01:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 102. [2021-11-22 15:01:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 101 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2021-11-22 15:01:28,222 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 19 [2021-11-22 15:01:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:28,222 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2021-11-22 15:01:28,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2021-11-22 15:01:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 15:01:28,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:28,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:28,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:01:28,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:28,441 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:28,441 INFO L85 PathProgramCache]: Analyzing trace with hash 35317445, now seen corresponding path program 1 times [2021-11-22 15:01:28,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:28,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069012404] [2021-11-22 15:01:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:28,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:28,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:28,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069012404] [2021-11-22 15:01:28,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069012404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:28,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:28,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:01:28,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67454216] [2021-11-22 15:01:28,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:28,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:01:28,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:01:28,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:01:28,479 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:28,520 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2021-11-22 15:01:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:01:28,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-22 15:01:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:28,523 INFO L225 Difference]: With dead ends: 108 [2021-11-22 15:01:28,523 INFO L226 Difference]: Without dead ends: 108 [2021-11-22 15:01:28,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:01:28,528 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:28,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 105 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:01:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-22 15:01:28,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2021-11-22 15:01:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 94 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2021-11-22 15:01:28,538 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 22 [2021-11-22 15:01:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:28,538 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2021-11-22 15:01:28,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2021-11-22 15:01:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 15:01:28,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:28,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:28,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-22 15:01:28,540 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1863163671, now seen corresponding path program 2 times [2021-11-22 15:01:28,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:28,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645127022] [2021-11-22 15:01:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:28,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:01:28,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:28,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645127022] [2021-11-22 15:01:28,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645127022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:28,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195450318] [2021-11-22 15:01:28,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:01:28,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:28,635 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:28,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:01:28,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:01:28,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:01:28,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 15:01:28,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:28,717 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:01:28,718 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 [2021-11-22 15:01:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:01:28,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:01:29,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195450318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:29,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:29,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-22 15:01:29,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881751079] [2021-11-22 15:01:29,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:29,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 15:01:29,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:29,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 15:01:29,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:01:29,121 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:29,279 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2021-11-22 15:01:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:01:29,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-22 15:01:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:29,281 INFO L225 Difference]: With dead ends: 200 [2021-11-22 15:01:29,281 INFO L226 Difference]: Without dead ends: 200 [2021-11-22 15:01:29,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-22 15:01:29,283 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 283 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:29,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 166 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:29,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-22 15:01:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 92. [2021-11-22 15:01:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 91 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2021-11-22 15:01:29,287 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 22 [2021-11-22 15:01:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:29,288 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2021-11-22 15:01:29,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2021-11-22 15:01:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 15:01:29,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:29,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:29,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:01:29,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-22 15:01:29,501 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:29,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2134181768, now seen corresponding path program 2 times [2021-11-22 15:01:29,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:29,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47108692] [2021-11-22 15:01:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:29,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:29,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:29,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47108692] [2021-11-22 15:01:29,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47108692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:29,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699312316] [2021-11-22 15:01:29,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:01:29,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:29,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:29,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:29,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:01:29,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:01:29,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:01:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-22 15:01:29,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:29,848 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 [2021-11-22 15:01:30,074 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 28 treesize of output 24 [2021-11-22 15:01:30,161 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-11-22 15:01:30,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-11-22 15:01:30,397 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-11-22 15:01:30,397 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 41 treesize of output 27 [2021-11-22 15:01:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:30,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:33,907 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 18 treesize of output 16 [2021-11-22 15:01:33,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-22 15:01:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:34,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699312316] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:34,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:34,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 27 [2021-11-22 15:01:34,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140279473] [2021-11-22 15:01:34,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:34,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-22 15:01:34,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-22 15:01:34,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-11-22 15:01:34,080 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2021-11-22 15:01:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:34,556 INFO L93 Difference]: Finished difference Result 201 states and 235 transitions. [2021-11-22 15:01:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-22 15:01:34,558 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) Word has length 23 [2021-11-22 15:01:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:34,560 INFO L225 Difference]: With dead ends: 201 [2021-11-22 15:01:34,560 INFO L226 Difference]: Without dead ends: 201 [2021-11-22 15:01:34,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-11-22 15:01:34,562 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 157 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:34,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 519 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 289 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2021-11-22 15:01:34,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-22 15:01:34,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 103. [2021-11-22 15:01:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 102 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:34,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2021-11-22 15:01:34,568 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 23 [2021-11-22 15:01:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:34,568 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2021-11-22 15:01:34,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2021-11-22 15:01:34,569 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2021-11-22 15:01:34,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 15:01:34,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:34,570 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] [2021-11-22 15:01:34,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:01:34,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:34,784 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:34,786 INFO L85 PathProgramCache]: Analyzing trace with hash 79040412, now seen corresponding path program 1 times [2021-11-22 15:01:34,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:34,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570958587] [2021-11-22 15:01:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:34,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:34,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:34,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570958587] [2021-11-22 15:01:34,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570958587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:34,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907174955] [2021-11-22 15:01:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:34,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:34,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:34,882 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:34,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:01:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:34,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 15:01:34,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:35,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:35,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907174955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:35,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:35,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2021-11-22 15:01:35,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100394975] [2021-11-22 15:01:35,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:35,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:01:35,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:35,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:01:35,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:01:35,209 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:35,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:35,289 INFO L93 Difference]: Finished difference Result 205 states and 243 transitions. [2021-11-22 15:01:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:01:35,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-22 15:01:35,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:35,291 INFO L225 Difference]: With dead ends: 205 [2021-11-22 15:01:35,291 INFO L226 Difference]: Without dead ends: 205 [2021-11-22 15:01:35,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:01:35,292 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:35,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 202 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:01:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-22 15:01:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 176. [2021-11-22 15:01:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.2514619883040936) internal successors, (214), 175 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 214 transitions. [2021-11-22 15:01:35,299 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 214 transitions. Word has length 23 [2021-11-22 15:01:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:35,299 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 214 transitions. [2021-11-22 15:01:35,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:35,300 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 214 transitions. [2021-11-22 15:01:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 15:01:35,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:35,301 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] [2021-11-22 15:01:35,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 15:01:35,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:35,515 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:35,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1609903330, now seen corresponding path program 1 times [2021-11-22 15:01:35,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:35,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669291422] [2021-11-22 15:01:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:35,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:35,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:35,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669291422] [2021-11-22 15:01:35,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669291422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:35,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:35,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 15:01:35,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009226351] [2021-11-22 15:01:35,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:35,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:01:35,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:01:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:01:35,651 INFO L87 Difference]: Start difference. First operand 176 states and 214 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:35,841 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2021-11-22 15:01:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:01:35,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-22 15:01:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:35,844 INFO L225 Difference]: With dead ends: 260 [2021-11-22 15:01:35,845 INFO L226 Difference]: Without dead ends: 260 [2021-11-22 15:01:35,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-22 15:01:35,846 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:35,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 252 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-22 15:01:35,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 191. [2021-11-22 15:01:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.2419354838709677) internal successors, (231), 190 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2021-11-22 15:01:35,854 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 23 [2021-11-22 15:01:35,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:35,855 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2021-11-22 15:01:35,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:35,855 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2021-11-22 15:01:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 15:01:35,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:35,856 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] [2021-11-22 15:01:35,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-22 15:01:35,856 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1867415516, now seen corresponding path program 1 times [2021-11-22 15:01:35,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:35,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644136376] [2021-11-22 15:01:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:35,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:36,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:36,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644136376] [2021-11-22 15:01:36,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644136376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:36,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:36,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-22 15:01:36,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241032330] [2021-11-22 15:01:36,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:36,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 15:01:36,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:36,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 15:01:36,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-22 15:01:36,067 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:36,390 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2021-11-22 15:01:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:01:36,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-22 15:01:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:36,392 INFO L225 Difference]: With dead ends: 223 [2021-11-22 15:01:36,392 INFO L226 Difference]: Without dead ends: 223 [2021-11-22 15:01:36,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-22 15:01:36,393 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:36,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 211 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-22 15:01:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 181. [2021-11-22 15:01:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.2556818181818181) internal successors, (221), 180 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 221 transitions. [2021-11-22 15:01:36,400 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 221 transitions. Word has length 23 [2021-11-22 15:01:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:36,400 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 221 transitions. [2021-11-22 15:01:36,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 221 transitions. [2021-11-22 15:01:36,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 15:01:36,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:36,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:36,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-22 15:01:36,403 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:36,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1387621483, now seen corresponding path program 1 times [2021-11-22 15:01:36,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:36,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806070225] [2021-11-22 15:01:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:36,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:36,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:36,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806070225] [2021-11-22 15:01:36,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806070225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:36,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:36,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:01:36,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044365375] [2021-11-22 15:01:36,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:36,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:01:36,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:36,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:01:36,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:01:36,499 INFO L87 Difference]: Start difference. First operand 181 states and 221 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:36,529 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2021-11-22 15:01:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:01:36,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-22 15:01:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:36,532 INFO L225 Difference]: With dead ends: 180 [2021-11-22 15:01:36,532 INFO L226 Difference]: Without dead ends: 133 [2021-11-22 15:01:36,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:01:36,533 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:36,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:01:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-22 15:01:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-22 15:01:36,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.178294573643411) internal successors, (152), 132 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2021-11-22 15:01:36,538 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 25 [2021-11-22 15:01:36,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:36,539 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2021-11-22 15:01:36,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2021-11-22 15:01:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 15:01:36,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:36,540 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:36,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-22 15:01:36,541 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:36,541 INFO L85 PathProgramCache]: Analyzing trace with hash -725186331, now seen corresponding path program 3 times [2021-11-22 15:01:36,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:36,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699531305] [2021-11-22 15:01:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:36,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:36,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:36,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699531305] [2021-11-22 15:01:36,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699531305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:36,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501458118] [2021-11-22 15:01:36,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:01:36,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:36,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:36,694 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:36,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 15:01:36,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 15:01:36,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:01:36,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-22 15:01:36,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:36,805 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:01:36,805 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 18 treesize of output 19 [2021-11-22 15:01:36,808 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 13 [2021-11-22 15:01:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:37,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:37,404 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 [2021-11-22 15:01:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:37,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501458118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:37,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:37,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-11-22 15:01:37,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358022865] [2021-11-22 15:01:37,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:37,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-22 15:01:37,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:37,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-22 15:01:37,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-11-22 15:01:37,419 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:38,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:38,011 INFO L93 Difference]: Finished difference Result 208 states and 231 transitions. [2021-11-22 15:01:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 15:01:38,011 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 15:01:38,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:38,013 INFO L225 Difference]: With dead ends: 208 [2021-11-22 15:01:38,013 INFO L226 Difference]: Without dead ends: 198 [2021-11-22 15:01:38,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 15:01:38,014 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 292 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:38,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 356 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:01:38,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-22 15:01:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2021-11-22 15:01:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.1736111111111112) internal successors, (169), 147 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) [2021-11-22 15:01:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2021-11-22 15:01:38,021 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 27 [2021-11-22 15:01:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:38,021 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2021-11-22 15:01:38,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2021-11-22 15:01:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 15:01:38,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:38,022 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] [2021-11-22 15:01:38,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 15:01:38,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-22 15:01:38,245 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash -424812231, now seen corresponding path program 1 times [2021-11-22 15:01:38,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:38,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078231222] [2021-11-22 15:01:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:38,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:38,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:38,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078231222] [2021-11-22 15:01:38,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078231222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:01:38,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:01:38,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-22 15:01:38,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892073037] [2021-11-22 15:01:38,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:01:38,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 15:01:38,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 15:01:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-22 15:01:38,419 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:38,729 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2021-11-22 15:01:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:01:38,730 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 15:01:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:38,731 INFO L225 Difference]: With dead ends: 218 [2021-11-22 15:01:38,731 INFO L226 Difference]: Without dead ends: 181 [2021-11-22 15:01:38,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-22 15:01:38,732 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 73 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:38,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 188 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:01:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-22 15:01:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2021-11-22 15:01:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.178082191780822) internal successors, (172), 149 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2021-11-22 15:01:38,737 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 27 [2021-11-22 15:01:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:38,738 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2021-11-22 15:01:38,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2021-11-22 15:01:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 15:01:38,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:38,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:38,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-22 15:01:38,739 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:38,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1119361538, now seen corresponding path program 4 times [2021-11-22 15:01:38,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:38,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563753758] [2021-11-22 15:01:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:38,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:38,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:38,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563753758] [2021-11-22 15:01:38,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563753758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448108901] [2021-11-22 15:01:38,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:01:38,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:38,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:38,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:38,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 15:01:39,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:01:39,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:01:39,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-22 15:01:39,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:39,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:01:39,051 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 [2021-11-22 15:01:39,359 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 29 treesize of output 25 [2021-11-22 15:01:39,432 INFO L354 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2021-11-22 15:01:39,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-22 15:01:39,898 INFO L354 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2021-11-22 15:01:39,898 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 48 treesize of output 37 [2021-11-22 15:01:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:40,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:41,582 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 62 treesize of output 58 [2021-11-22 15:01:42,110 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 49 treesize of output 47 [2021-11-22 15:01:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:42,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448108901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:42,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:42,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 37 [2021-11-22 15:01:42,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107925780] [2021-11-22 15:01:42,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:42,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-22 15:01:42,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:42,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-22 15:01:42,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1198, Unknown=1, NotChecked=0, Total=1332 [2021-11-22 15:01:42,127 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 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) [2021-11-22 15:01:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:43,450 INFO L93 Difference]: Finished difference Result 296 states and 328 transitions. [2021-11-22 15:01:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 15:01:43,451 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 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) Word has length 29 [2021-11-22 15:01:43,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:43,453 INFO L225 Difference]: With dead ends: 296 [2021-11-22 15:01:43,453 INFO L226 Difference]: Without dead ends: 259 [2021-11-22 15:01:43,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=310, Invalid=2551, Unknown=1, NotChecked=0, Total=2862 [2021-11-22 15:01:43,455 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 148 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:43,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 762 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 556 Invalid, 0 Unknown, 222 Unchecked, 0.5s Time] [2021-11-22 15:01:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-22 15:01:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2021-11-22 15:01:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.1715976331360947) internal successors, (198), 172 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2021-11-22 15:01:43,462 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 29 [2021-11-22 15:01:43,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:43,463 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2021-11-22 15:01:43,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 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) [2021-11-22 15:01:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2021-11-22 15:01:43,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 15:01:43,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:43,464 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, 1, 1] [2021-11-22 15:01:43,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 15:01:43,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-22 15:01:43,689 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:43,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:43,689 INFO L85 PathProgramCache]: Analyzing trace with hash 515027158, now seen corresponding path program 1 times [2021-11-22 15:01:43,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:43,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097117973] [2021-11-22 15:01:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:43,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:43,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:43,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097117973] [2021-11-22 15:01:43,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097117973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:43,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119769370] [2021-11-22 15:01:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:43,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:43,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:43,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:43,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 15:01:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:44,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 15:01:44,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:44,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:44,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-22 15:01:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:44,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119769370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:44,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:44,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2021-11-22 15:01:44,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302446956] [2021-11-22 15:01:44,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:44,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 15:01:44,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 15:01:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-22 15:01:44,444 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:44,800 INFO L93 Difference]: Finished difference Result 212 states and 235 transitions. [2021-11-22 15:01:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:01:44,801 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 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) Word has length 31 [2021-11-22 15:01:44,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:44,802 INFO L225 Difference]: With dead ends: 212 [2021-11-22 15:01:44,802 INFO L226 Difference]: Without dead ends: 212 [2021-11-22 15:01:44,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2021-11-22 15:01:44,804 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 255 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:44,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 276 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:01:44,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-22 15:01:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2021-11-22 15:01:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 190 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2021-11-22 15:01:44,819 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 31 [2021-11-22 15:01:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:44,819 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2021-11-22 15:01:44,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2021-11-22 15:01:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 15:01:44,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:44,821 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:44,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 15:01:45,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:45,037 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash 496512411, now seen corresponding path program 5 times [2021-11-22 15:01:45,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:45,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642422735] [2021-11-22 15:01:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:45,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:45,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:45,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642422735] [2021-11-22 15:01:45,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642422735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:45,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973519184] [2021-11-22 15:01:45,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:01:45,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:45,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:45,211 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:45,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 15:01:45,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-22 15:01:45,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:01:45,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-22 15:01:45,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:45,334 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:01:45,334 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 [2021-11-22 15:01:45,772 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 26 treesize of output 22 [2021-11-22 15:01:45,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:01:45,899 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 29 treesize of output 29 [2021-11-22 15:01:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:46,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:46,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-22 15:01:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:47,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973519184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:47,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:47,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 40 [2021-11-22 15:01:47,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174482158] [2021-11-22 15:01:47,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:47,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-22 15:01:47,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:47,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-22 15:01:47,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2021-11-22 15:01:47,098 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:48,626 INFO L93 Difference]: Finished difference Result 265 states and 292 transitions. [2021-11-22 15:01:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 15:01:48,626 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 15:01:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:48,628 INFO L225 Difference]: With dead ends: 265 [2021-11-22 15:01:48,628 INFO L226 Difference]: Without dead ends: 265 [2021-11-22 15:01:48,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=488, Invalid=3172, Unknown=0, NotChecked=0, Total=3660 [2021-11-22 15:01:48,630 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 242 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:48,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 916 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 811 Invalid, 0 Unknown, 256 Unchecked, 0.5s Time] [2021-11-22 15:01:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-22 15:01:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 197. [2021-11-22 15:01:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 193 states have (on average 1.160621761658031) internal successors, (224), 196 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 224 transitions. [2021-11-22 15:01:48,637 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 224 transitions. Word has length 33 [2021-11-22 15:01:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:48,638 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 224 transitions. [2021-11-22 15:01:48,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 224 transitions. [2021-11-22 15:01:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 15:01:48,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:48,639 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:48,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 15:01:48,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:48,864 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:48,865 INFO L85 PathProgramCache]: Analyzing trace with hash 407057716, now seen corresponding path program 6 times [2021-11-22 15:01:48,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:48,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301855489] [2021-11-22 15:01:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:48,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:49,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:49,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301855489] [2021-11-22 15:01:49,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301855489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:49,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646729078] [2021-11-22 15:01:49,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:01:49,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:49,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:49,182 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:49,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 15:01:49,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-22 15:01:49,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:01:49,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 15:01:49,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:49,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:01:49,564 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 28 treesize of output 24 [2021-11-22 15:01:49,641 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-22 15:01:49,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-22 15:01:50,247 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-22 15:01:50,248 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 45 treesize of output 27 [2021-11-22 15:01:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:50,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:01:55,924 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 18 treesize of output 16 [2021-11-22 15:01:55,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-22 15:01:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:56,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646729078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:01:56,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:01:56,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 34 [2021-11-22 15:01:56,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520082748] [2021-11-22 15:01:56,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:01:56,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-22 15:01:56,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:01:56,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-22 15:01:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2021-11-22 15:01:56,191 INFO L87 Difference]: Start difference. First operand 197 states and 224 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 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) [2021-11-22 15:01:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:01:56,790 INFO L93 Difference]: Finished difference Result 365 states and 405 transitions. [2021-11-22 15:01:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 15:01:56,790 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-22 15:01:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:01:56,792 INFO L225 Difference]: With dead ends: 365 [2021-11-22 15:01:56,793 INFO L226 Difference]: Without dead ends: 352 [2021-11-22 15:01:56,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2021-11-22 15:01:56,794 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 132 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:01:56,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 938 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 403 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2021-11-22 15:01:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-22 15:01:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 243. [2021-11-22 15:01:56,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 239 states have (on average 1.1589958158995817) internal successors, (277), 242 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:01:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 277 transitions. [2021-11-22 15:01:56,803 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 277 transitions. Word has length 35 [2021-11-22 15:01:56,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:01:56,804 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 277 transitions. [2021-11-22 15:01:56,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 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) [2021-11-22 15:01:56,804 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 277 transitions. [2021-11-22 15:01:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-22 15:01:56,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:01:56,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:01:56,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-22 15:01:57,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-22 15:01:57,021 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:01:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:01:57,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1933322104, now seen corresponding path program 2 times [2021-11-22 15:01:57,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:01:57,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258258488] [2021-11-22 15:01:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:01:57,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:01:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:01:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:01:57,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:01:57,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258258488] [2021-11-22 15:01:57,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258258488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:01:57,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369294364] [2021-11-22 15:01:57,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:01:57,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:01:57,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:01:57,590 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:01:57,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 15:01:57,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:01:57,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:01:57,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-22 15:01:57,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:01:57,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:01:57,856 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 25 treesize of output 21 [2021-11-22 15:01:58,102 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-22 15:01:58,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-22 15:01:58,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:01:58,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-22 15:01:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:01:58,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:00,912 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 77 treesize of output 71 [2021-11-22 15:02:00,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 15:02:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:02:01,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369294364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:01,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:01,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 14] total 44 [2021-11-22 15:02:01,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539109728] [2021-11-22 15:02:01,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:01,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-22 15:02:01,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-22 15:02:01,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2021-11-22 15:02:01,249 INFO L87 Difference]: Start difference. First operand 243 states and 277 transitions. Second operand has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 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) [2021-11-22 15:02:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:02,191 INFO L93 Difference]: Finished difference Result 272 states and 305 transitions. [2021-11-22 15:02:02,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 15:02:02,192 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 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) Word has length 37 [2021-11-22 15:02:02,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:02,193 INFO L225 Difference]: With dead ends: 272 [2021-11-22 15:02:02,193 INFO L226 Difference]: Without dead ends: 260 [2021-11-22 15:02:02,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=395, Invalid=3265, Unknown=0, NotChecked=0, Total=3660 [2021-11-22 15:02:02,195 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 158 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:02,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 331 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 346 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2021-11-22 15:02:02,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-22 15:02:02,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2021-11-22 15:02:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.1594827586206897) internal successors, (269), 235 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 269 transitions. [2021-11-22 15:02:02,203 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 269 transitions. Word has length 37 [2021-11-22 15:02:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:02,203 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 269 transitions. [2021-11-22 15:02:02,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 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) [2021-11-22 15:02:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 269 transitions. [2021-11-22 15:02:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 15:02:02,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:02,205 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:02,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:02,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:02,417 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:02:02,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1211405073, now seen corresponding path program 7 times [2021-11-22 15:02:02,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:02,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146675176] [2021-11-22 15:02:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:02,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:02,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:02,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146675176] [2021-11-22 15:02:02,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146675176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:02,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299288788] [2021-11-22 15:02:02,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:02:02,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:02,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:02,709 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:02,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 15:02:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:02,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-22 15:02:02,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:02,819 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:02:02,819 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 18 treesize of output 19 [2021-11-22 15:02:02,823 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 13 [2021-11-22 15:02:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:03,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:03,884 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 [2021-11-22 15:02:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:03,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299288788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:03,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:03,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2021-11-22 15:02:03,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766813623] [2021-11-22 15:02:03,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:03,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-22 15:02:03,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:03,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-22 15:02:03,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-11-22 15:02:03,894 INFO L87 Difference]: Start difference. First operand 236 states and 269 transitions. Second operand has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:05,311 INFO L93 Difference]: Finished difference Result 444 states and 485 transitions. [2021-11-22 15:02:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-22 15:02:05,312 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-22 15:02:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:05,314 INFO L225 Difference]: With dead ends: 444 [2021-11-22 15:02:05,315 INFO L226 Difference]: Without dead ends: 424 [2021-11-22 15:02:05,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=2311, Unknown=0, NotChecked=0, Total=2862 [2021-11-22 15:02:05,317 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 715 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:05,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 957 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 15:02:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-22 15:02:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 278. [2021-11-22 15:02:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 274 states have (on average 1.1423357664233578) internal successors, (313), 277 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:05,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 313 transitions. [2021-11-22 15:02:05,328 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 313 transitions. Word has length 39 [2021-11-22 15:02:05,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:05,329 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 313 transitions. [2021-11-22 15:02:05,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:05,329 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 313 transitions. [2021-11-22 15:02:05,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 15:02:05,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:05,331 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:05,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:05,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-22 15:02:05,557 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:02:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:05,557 INFO L85 PathProgramCache]: Analyzing trace with hash -22467999, now seen corresponding path program 1 times [2021-11-22 15:02:05,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:05,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589793221] [2021-11-22 15:02:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:05,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:02:05,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:05,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589793221] [2021-11-22 15:02:05,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589793221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:05,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712555717] [2021-11-22 15:02:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:05,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:05,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:06,001 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:06,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 15:02:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:06,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-22 15:02:06,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:06,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-22 15:02:06,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:02:06,823 INFO L354 Elim1Store]: treesize reduction 35, result has 38.6 percent of original size [2021-11-22 15:02:06,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 51 [2021-11-22 15:02:07,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:02:07,786 INFO L354 Elim1Store]: treesize reduction 50, result has 28.6 percent of original size [2021-11-22 15:02:07,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 59 [2021-11-22 15:02:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:08,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:08,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:02:08,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-22 15:02:23,553 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 119 treesize of output 111 [2021-11-22 15:02:23,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:02:23,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 107 [2021-11-22 15:02:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:02:23,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712555717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:23,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:23,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 19] total 54 [2021-11-22 15:02:23,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842101418] [2021-11-22 15:02:23,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:23,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-22 15:02:23,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-22 15:02:23,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2619, Unknown=4, NotChecked=0, Total=2862 [2021-11-22 15:02:23,982 INFO L87 Difference]: Start difference. First operand 278 states and 313 transitions. Second operand has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 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) [2021-11-22 15:02:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:25,541 INFO L93 Difference]: Finished difference Result 340 states and 377 transitions. [2021-11-22 15:02:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 15:02:25,542 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 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 39 [2021-11-22 15:02:25,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:25,544 INFO L225 Difference]: With dead ends: 340 [2021-11-22 15:02:25,544 INFO L226 Difference]: Without dead ends: 315 [2021-11-22 15:02:25,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=497, Invalid=5049, Unknown=4, NotChecked=0, Total=5550 [2021-11-22 15:02:25,546 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:25,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 515 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 457 Invalid, 0 Unknown, 226 Unchecked, 0.3s Time] [2021-11-22 15:02:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-22 15:02:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 267. [2021-11-22 15:02:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 263 states have (on average 1.144486692015209) internal successors, (301), 266 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 301 transitions. [2021-11-22 15:02:25,553 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 301 transitions. Word has length 39 [2021-11-22 15:02:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:25,553 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 301 transitions. [2021-11-22 15:02:25,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 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) [2021-11-22 15:02:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 301 transitions. [2021-11-22 15:02:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 15:02:25,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:25,555 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:25,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:25,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:25,773 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:02:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash 224138538, now seen corresponding path program 8 times [2021-11-22 15:02:25,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:25,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125712302] [2021-11-22 15:02:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:25,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:02:26,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:26,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125712302] [2021-11-22 15:02:26,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125712302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:26,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636476255] [2021-11-22 15:02:26,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:02:26,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:26,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:26,071 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:26,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-22 15:02:26,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:02:26,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:26,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-22 15:02:26,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:26,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:02:26,382 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 28 treesize of output 24 [2021-11-22 15:02:26,458 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-22 15:02:26,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-22 15:02:26,980 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-22 15:02:26,980 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 45 treesize of output 27 [2021-11-22 15:02:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:02:26,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:35,895 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 18 treesize of output 16 [2021-11-22 15:02:35,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-22 15:02:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:02:36,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636476255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:36,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:36,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 39 [2021-11-22 15:02:36,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745489031] [2021-11-22 15:02:36,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:36,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-22 15:02:36,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:36,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-22 15:02:36,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2021-11-22 15:02:36,183 INFO L87 Difference]: Start difference. First operand 267 states and 301 transitions. Second operand has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:36,727 INFO L93 Difference]: Finished difference Result 448 states and 494 transitions. [2021-11-22 15:02:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-22 15:02:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 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 41 [2021-11-22 15:02:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:36,730 INFO L225 Difference]: With dead ends: 448 [2021-11-22 15:02:36,730 INFO L226 Difference]: Without dead ends: 414 [2021-11-22 15:02:36,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=190, Invalid=1972, Unknown=0, NotChecked=0, Total=2162 [2021-11-22 15:02:36,732 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 142 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:36,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1286 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 632 Invalid, 0 Unknown, 149 Unchecked, 0.3s Time] [2021-11-22 15:02:36,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-22 15:02:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 294. [2021-11-22 15:02:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 290 states have (on average 1.1482758620689655) internal successors, (333), 293 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 333 transitions. [2021-11-22 15:02:36,741 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 333 transitions. Word has length 41 [2021-11-22 15:02:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:36,741 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 333 transitions. [2021-11-22 15:02:36,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 333 transitions. [2021-11-22 15:02:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-22 15:02:36,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:36,743 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2021-11-22 15:02:36,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:36,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:36,968 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:02:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:36,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2099498562, now seen corresponding path program 2 times [2021-11-22 15:02:36,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:36,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121311165] [2021-11-22 15:02:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:36,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:02:37,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:37,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121311165] [2021-11-22 15:02:37,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121311165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:37,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527116179] [2021-11-22 15:02:37,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:02:37,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:37,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:37,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:37,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-22 15:02:37,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:02:37,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:37,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-22 15:02:37,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:37,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:02:37,547 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 21 treesize of output 17 [2021-11-22 15:02:37,808 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-22 15:02:37,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-11-22 15:02:37,862 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 21 treesize of output 13 [2021-11-22 15:02:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:02:37,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:38,114 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 85 treesize of output 79 [2021-11-22 15:02:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:02:38,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527116179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:38,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:38,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 36 [2021-11-22 15:02:38,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816301114] [2021-11-22 15:02:38,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:38,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 15:02:38,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:38,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 15:02:38,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 15:02:38,449 INFO L87 Difference]: Start difference. First operand 294 states and 333 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:38,754 INFO L93 Difference]: Finished difference Result 508 states and 565 transitions. [2021-11-22 15:02:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 15:02:38,757 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-22 15:02:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:38,759 INFO L225 Difference]: With dead ends: 508 [2021-11-22 15:02:38,759 INFO L226 Difference]: Without dead ends: 412 [2021-11-22 15:02:38,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-11-22 15:02:38,761 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:38,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 402 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 248 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2021-11-22 15:02:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-22 15:02:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 347. [2021-11-22 15:02:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 343 states have (on average 1.1399416909620992) internal successors, (391), 346 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) [2021-11-22 15:02:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 391 transitions. [2021-11-22 15:02:38,769 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 391 transitions. Word has length 43 [2021-11-22 15:02:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:38,770 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 391 transitions. [2021-11-22 15:02:38,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 391 transitions. [2021-11-22 15:02:38,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-22 15:02:38,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:38,771 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:38,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:38,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-22 15:02:38,985 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:02:38,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:38,985 INFO L85 PathProgramCache]: Analyzing trace with hash 315939143, now seen corresponding path program 9 times [2021-11-22 15:02:38,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:38,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749502797] [2021-11-22 15:02:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:38,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:39,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:39,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749502797] [2021-11-22 15:02:39,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749502797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:39,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595200714] [2021-11-22 15:02:39,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:02:39,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:39,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:39,269 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:39,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-22 15:02:39,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-22 15:02:39,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:39,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-22 15:02:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:39,396 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:02:39,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-22 15:02:39,399 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 15 treesize of output 13 [2021-11-22 15:02:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:39,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:40,565 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 [2021-11-22 15:02:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:40,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595200714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:40,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:40,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2021-11-22 15:02:40,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642172089] [2021-11-22 15:02:40,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:40,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-22 15:02:40,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:40,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-22 15:02:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-11-22 15:02:40,574 INFO L87 Difference]: Start difference. First operand 347 states and 391 transitions. Second operand has 45 states, 44 states have (on average 2.840909090909091) internal successors, (125), 45 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:41,876 INFO L93 Difference]: Finished difference Result 611 states and 667 transitions. [2021-11-22 15:02:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 15:02:41,877 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.840909090909091) internal successors, (125), 45 states have internal predecessors, (125), 0 states have call successors, (0), 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 45 [2021-11-22 15:02:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:41,880 INFO L225 Difference]: With dead ends: 611 [2021-11-22 15:02:41,880 INFO L226 Difference]: Without dead ends: 591 [2021-11-22 15:02:41,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=788, Invalid=3118, Unknown=0, NotChecked=0, Total=3906 [2021-11-22 15:02:41,882 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 824 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:41,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 869 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 15:02:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-22 15:02:41,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 376. [2021-11-22 15:02:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 372 states have (on average 1.1344086021505377) internal successors, (422), 375 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 422 transitions. [2021-11-22 15:02:41,893 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 422 transitions. Word has length 45 [2021-11-22 15:02:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:41,894 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 422 transitions. [2021-11-22 15:02:41,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.840909090909091) internal successors, (125), 45 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 422 transitions. [2021-11-22 15:02:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-22 15:02:41,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:41,895 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:41,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:42,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-22 15:02:42,111 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:02:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash -801015308, now seen corresponding path program 1 times [2021-11-22 15:02:42,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:42,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842609709] [2021-11-22 15:02:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:42,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:02:42,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:42,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842609709] [2021-11-22 15:02:42,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842609709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:42,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113472240] [2021-11-22 15:02:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:42,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:42,303 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:42,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-22 15:02:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:42,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-22 15:02:42,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:42,384 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:02:42,385 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 18 treesize of output 19 [2021-11-22 15:02:42,388 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 13 [2021-11-22 15:02:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:02:42,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:43,225 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 [2021-11-22 15:02:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:02:43,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113472240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:43,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:43,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2021-11-22 15:02:43,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313674429] [2021-11-22 15:02:43,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:43,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-22 15:02:43,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:43,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-22 15:02:43,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-11-22 15:02:43,234 INFO L87 Difference]: Start difference. First operand 376 states and 422 transitions. Second operand has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:43,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:43,826 INFO L93 Difference]: Finished difference Result 538 states and 589 transitions. [2021-11-22 15:02:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 15:02:43,827 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 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 46 [2021-11-22 15:02:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:43,829 INFO L225 Difference]: With dead ends: 538 [2021-11-22 15:02:43,829 INFO L226 Difference]: Without dead ends: 490 [2021-11-22 15:02:43,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=333, Invalid=1389, Unknown=0, NotChecked=0, Total=1722 [2021-11-22 15:02:43,831 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 354 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:43,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 402 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:02:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-22 15:02:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 348. [2021-11-22 15:02:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.130813953488372) internal successors, (389), 347 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 389 transitions. [2021-11-22 15:02:43,842 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 389 transitions. Word has length 46 [2021-11-22 15:02:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:43,843 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 389 transitions. [2021-11-22 15:02:43,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 389 transitions. [2021-11-22 15:02:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-22 15:02:43,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:43,844 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:43,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:44,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-22 15:02:44,064 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:02:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1325160992, now seen corresponding path program 10 times [2021-11-22 15:02:44,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:44,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158294344] [2021-11-22 15:02:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:44,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 18 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:02:44,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:44,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158294344] [2021-11-22 15:02:44,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158294344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:44,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519590240] [2021-11-22 15:02:44,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:02:44,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:44,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:44,398 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:44,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-22 15:02:44,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:02:44,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:44,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-22 15:02:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:44,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:02:44,502 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 [2021-11-22 15:02:45,073 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 29 treesize of output 25 [2021-11-22 15:02:45,134 INFO L354 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2021-11-22 15:02:45,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-22 15:02:45,782 INFO L354 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2021-11-22 15:02:45,782 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 48 treesize of output 37 [2021-11-22 15:02:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:45,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:48,533 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 62 treesize of output 58 [2021-11-22 15:02:49,362 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 49 treesize of output 47 [2021-11-22 15:02:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 34 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:49,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519590240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:49,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:49,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 55 [2021-11-22 15:02:49,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231212462] [2021-11-22 15:02:49,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:49,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-22 15:02:49,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-22 15:02:49,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2701, Unknown=1, NotChecked=0, Total=2970 [2021-11-22 15:02:49,373 INFO L87 Difference]: Start difference. First operand 348 states and 389 transitions. Second operand has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:51,483 INFO L93 Difference]: Finished difference Result 725 states and 786 transitions. [2021-11-22 15:02:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-22 15:02:51,483 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 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 47 [2021-11-22 15:02:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:51,486 INFO L225 Difference]: With dead ends: 725 [2021-11-22 15:02:51,486 INFO L226 Difference]: Without dead ends: 655 [2021-11-22 15:02:51,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=568, Invalid=5911, Unknown=1, NotChecked=0, Total=6480 [2021-11-22 15:02:51,489 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 252 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:51,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 2433 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1427 Invalid, 0 Unknown, 300 Unchecked, 0.8s Time] [2021-11-22 15:02:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-22 15:02:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 377. [2021-11-22 15:02:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 373 states have (on average 1.1313672922252012) internal successors, (422), 376 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 422 transitions. [2021-11-22 15:02:51,502 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 422 transitions. Word has length 47 [2021-11-22 15:02:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:51,502 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 422 transitions. [2021-11-22 15:02:51,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 422 transitions. [2021-11-22 15:02:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-22 15:02:51,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:51,504 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-11-22 15:02:51,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:51,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-22 15:02:51,720 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:02:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash 599820123, now seen corresponding path program 3 times [2021-11-22 15:02:51,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:51,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120594260] [2021-11-22 15:02:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:51,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:02:51,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:51,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120594260] [2021-11-22 15:02:51,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120594260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:51,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026353172] [2021-11-22 15:02:51,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:02:51,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:51,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:51,905 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:51,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-22 15:02:51,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 15:02:51,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-22 15:02:51,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:52,006 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:02:52,006 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 [2021-11-22 15:02:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:02:52,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:02:52,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026353172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:52,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:52,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2021-11-22 15:02:52,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540026620] [2021-11-22 15:02:52,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:52,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-22 15:02:52,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:52,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-22 15:02:52,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-11-22 15:02:52,767 INFO L87 Difference]: Start difference. First operand 377 states and 422 transitions. Second operand has 30 states, 29 states have (on average 4.0) internal successors, (116), 30 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:53,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:53,247 INFO L93 Difference]: Finished difference Result 501 states and 544 transitions. [2021-11-22 15:02:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-22 15:02:53,248 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.0) internal successors, (116), 30 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-22 15:02:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:53,249 INFO L225 Difference]: With dead ends: 501 [2021-11-22 15:02:53,249 INFO L226 Difference]: Without dead ends: 501 [2021-11-22 15:02:53,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-11-22 15:02:53,250 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 406 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:53,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 317 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:02:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-22 15:02:53,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 393. [2021-11-22 15:02:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.1233933161953729) internal successors, (437), 392 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 437 transitions. [2021-11-22 15:02:53,259 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 437 transitions. Word has length 47 [2021-11-22 15:02:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:53,260 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 437 transitions. [2021-11-22 15:02:53,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.0) internal successors, (116), 30 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 437 transitions. [2021-11-22 15:02:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-22 15:02:53,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:53,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2021-11-22 15:02:53,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:53,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-22 15:02:53,476 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:02:53,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:53,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1568194937, now seen corresponding path program 1 times [2021-11-22 15:02:53,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:53,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87978004] [2021-11-22 15:02:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:53,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:02:53,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:53,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87978004] [2021-11-22 15:02:53,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87978004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:53,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872704016] [2021-11-22 15:02:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:53,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:53,712 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:53,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-22 15:02:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:53,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-22 15:02:53,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:53,830 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:02:53,830 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 18 treesize of output 19 [2021-11-22 15:02:53,834 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 13 [2021-11-22 15:02:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:02:54,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:54,982 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 [2021-11-22 15:02:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:02:55,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872704016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:55,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:55,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2021-11-22 15:02:55,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431860080] [2021-11-22 15:02:55,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:55,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 15:02:55,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:55,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 15:02:55,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 15:02:55,007 INFO L87 Difference]: Start difference. First operand 393 states and 437 transitions. Second operand has 36 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 36 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) [2021-11-22 15:02:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:56,513 INFO L93 Difference]: Finished difference Result 626 states and 683 transitions. [2021-11-22 15:02:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 15:02:56,514 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 36 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) Word has length 50 [2021-11-22 15:02:56,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:56,518 INFO L225 Difference]: With dead ends: 626 [2021-11-22 15:02:56,518 INFO L226 Difference]: Without dead ends: 620 [2021-11-22 15:02:56,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=664, Invalid=2996, Unknown=0, NotChecked=0, Total=3660 [2021-11-22 15:02:56,519 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 532 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:56,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 390 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 15:02:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-22 15:02:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 454. [2021-11-22 15:02:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 450 states have (on average 1.1311111111111112) internal successors, (509), 453 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 509 transitions. [2021-11-22 15:02:56,530 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 509 transitions. Word has length 50 [2021-11-22 15:02:56,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:56,531 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 509 transitions. [2021-11-22 15:02:56,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 36 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) [2021-11-22 15:02:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 509 transitions. [2021-11-22 15:02:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 15:02:56,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:56,533 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:56,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:56,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:56,753 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:02:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:56,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1171395, now seen corresponding path program 11 times [2021-11-22 15:02:56,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:56,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210548659] [2021-11-22 15:02:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:56,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:57,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210548659] [2021-11-22 15:02:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210548659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112525818] [2021-11-22 15:02:57,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:02:57,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:57,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:57,095 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:57,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-22 15:02:57,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-22 15:02:57,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:57,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-22 15:02:57,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:57,214 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:02:57,214 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 18 treesize of output 19 [2021-11-22 15:02:57,218 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 13 [2021-11-22 15:02:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:57,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:58,481 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 [2021-11-22 15:02:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 66 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:58,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112525818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:58,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:58,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2021-11-22 15:02:58,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938924525] [2021-11-22 15:02:58,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:58,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-22 15:02:58,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:58,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-22 15:02:58,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-11-22 15:02:58,492 INFO L87 Difference]: Start difference. First operand 454 states and 509 transitions. Second operand has 47 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:59,768 INFO L93 Difference]: Finished difference Result 904 states and 985 transitions. [2021-11-22 15:02:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 15:02:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-22 15:02:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:59,771 INFO L225 Difference]: With dead ends: 904 [2021-11-22 15:02:59,771 INFO L226 Difference]: Without dead ends: 884 [2021-11-22 15:02:59,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=794, Invalid=3238, Unknown=0, NotChecked=0, Total=4032 [2021-11-22 15:02:59,772 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 596 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:59,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 1390 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 15:02:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-11-22 15:02:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 504. [2021-11-22 15:02:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.124) internal successors, (562), 503 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 562 transitions. [2021-11-22 15:02:59,786 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 562 transitions. Word has length 51 [2021-11-22 15:02:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:59,786 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 562 transitions. [2021-11-22 15:02:59,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 562 transitions. [2021-11-22 15:02:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 15:02:59,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:59,788 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2021-11-22 15:02:59,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:00,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:00,009 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:03:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash 620577460, now seen corresponding path program 3 times [2021-11-22 15:03:00,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:00,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278002991] [2021-11-22 15:03:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:00,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:03:00,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:00,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278002991] [2021-11-22 15:03:00,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278002991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:00,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21184352] [2021-11-22 15:03:00,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:03:00,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:00,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:00,755 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:00,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-22 15:03:00,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 15:03:00,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:03:00,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-22 15:03:00,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:00,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:03:01,200 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 21 treesize of output 17 [2021-11-22 15:03:01,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:03:01,419 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 21 treesize of output 20 [2021-11-22 15:03:01,579 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-22 15:03:01,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-11-22 15:03:01,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:03:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:03:01,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:02,295 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncat_#t~mem5#1| Int) (|ULTIMATE.start_cstrncat_~s~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |ULTIMATE.start_cstrncat_~s~0#1.offset| |ULTIMATE.start_cstrncat_#t~mem5#1|)) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2021-11-22 15:03:10,721 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncat_#t~mem5#1_63| Int) (|ULTIMATE.start_cstrncat_#t~mem5#1| Int) (|ULTIMATE.start_cstrncat_~s~0#1.offset| Int) (|v_ULTIMATE.start_cstrncat_~s~0#1.offset_168| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |ULTIMATE.start_cstrncat_~s~0#1.offset| |ULTIMATE.start_cstrncat_#t~mem5#1|) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_168| |v_ULTIMATE.start_cstrncat_#t~mem5#1_63|)) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2021-11-22 15:03:27,102 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 774 treesize of output 750 [2021-11-22 15:03:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-22 15:03:27,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21184352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:27,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:27,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 18] total 42 [2021-11-22 15:03:27,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839213520] [2021-11-22 15:03:27,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:27,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-22 15:03:27,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-22 15:03:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1348, Unknown=33, NotChecked=154, Total=1722 [2021-11-22 15:03:27,881 INFO L87 Difference]: Start difference. First operand 504 states and 562 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:30,331 INFO L93 Difference]: Finished difference Result 561 states and 617 transitions. [2021-11-22 15:03:30,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-22 15:03:30,331 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 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 [2021-11-22 15:03:30,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:30,334 INFO L225 Difference]: With dead ends: 561 [2021-11-22 15:03:30,334 INFO L226 Difference]: Without dead ends: 506 [2021-11-22 15:03:30,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=562, Invalid=3194, Unknown=34, NotChecked=242, Total=4032 [2021-11-22 15:03:30,336 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 227 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:30,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 468 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 499 Invalid, 0 Unknown, 285 Unchecked, 0.3s Time] [2021-11-22 15:03:30,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-22 15:03:30,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 485. [2021-11-22 15:03:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 481 states have (on average 1.1205821205821205) internal successors, (539), 484 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 539 transitions. [2021-11-22 15:03:30,346 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 539 transitions. Word has length 51 [2021-11-22 15:03:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:30,346 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 539 transitions. [2021-11-22 15:03:30,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 539 transitions. [2021-11-22 15:03:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 15:03:30,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:30,348 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:03:30,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:30,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-22 15:03:30,560 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:03:30,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:30,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1125709994, now seen corresponding path program 12 times [2021-11-22 15:03:30,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:30,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880711508] [2021-11-22 15:03:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:30,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:03:31,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:31,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880711508] [2021-11-22 15:03:31,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880711508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:31,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150171284] [2021-11-22 15:03:31,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:03:31,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:31,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:31,009 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:31,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-22 15:03:31,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-22 15:03:31,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:03:31,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-22 15:03:31,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:31,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:03:31,513 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 28 treesize of output 24 [2021-11-22 15:03:31,599 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-22 15:03:31,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-22 15:03:32,410 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-22 15:03:32,410 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 45 treesize of output 27 [2021-11-22 15:03:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:03:32,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:38,750 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 18 treesize of output 16 [2021-11-22 15:03:38,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-22 15:03:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:03:39,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150171284] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:39,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:39,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 49 [2021-11-22 15:03:39,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154990299] [2021-11-22 15:03:39,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:39,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-22 15:03:39,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:39,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-22 15:03:39,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2205, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 15:03:39,188 INFO L87 Difference]: Start difference. First operand 485 states and 539 transitions. Second operand has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:40,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:40,198 INFO L93 Difference]: Finished difference Result 914 states and 999 transitions. [2021-11-22 15:03:40,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-22 15:03:40,199 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-22 15:03:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:40,202 INFO L225 Difference]: With dead ends: 914 [2021-11-22 15:03:40,202 INFO L226 Difference]: Without dead ends: 855 [2021-11-22 15:03:40,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-11-22 15:03:40,213 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 217 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 2394 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:40,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 2394 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1069 Invalid, 0 Unknown, 541 Unchecked, 0.5s Time] [2021-11-22 15:03:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-11-22 15:03:40,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 518. [2021-11-22 15:03:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 514 states have (on average 1.1245136186770428) internal successors, (578), 517 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 578 transitions. [2021-11-22 15:03:40,224 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 578 transitions. Word has length 53 [2021-11-22 15:03:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:40,224 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 578 transitions. [2021-11-22 15:03:40,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 578 transitions. [2021-11-22 15:03:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-22 15:03:40,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:40,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:03:40,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:40,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:40,448 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:03:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:40,449 INFO L85 PathProgramCache]: Analyzing trace with hash 796337809, now seen corresponding path program 4 times [2021-11-22 15:03:40,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:40,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949320180] [2021-11-22 15:03:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:40,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:03:41,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949320180] [2021-11-22 15:03:41,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949320180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938840424] [2021-11-22 15:03:41,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:03:41,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:41,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:41,013 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:41,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-22 15:03:41,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:03:41,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:03:41,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-22 15:03:41,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:41,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:03:41,122 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 [2021-11-22 15:03:41,417 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 15 treesize of output 11 [2021-11-22 15:03:41,569 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 23 treesize of output 22 [2021-11-22 15:03:41,658 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-22 15:03:41,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-22 15:03:41,747 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-22 15:03:41,747 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 34 treesize of output 25 [2021-11-22 15:03:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 15:03:41,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:51,400 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 632 treesize of output 616 [2021-11-22 15:03:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 22 refuted. 2 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 15:03:52,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938840424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:52,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:52,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 17] total 46 [2021-11-22 15:03:52,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849608848] [2021-11-22 15:03:52,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:52,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-22 15:03:52,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:52,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-22 15:03:52,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1901, Unknown=5, NotChecked=0, Total=2070 [2021-11-22 15:03:52,607 INFO L87 Difference]: Start difference. First operand 518 states and 578 transitions. Second operand has 46 states, 46 states have (on average 2.760869565217391) internal successors, (127), 46 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:55,466 INFO L93 Difference]: Finished difference Result 941 states and 1019 transitions. [2021-11-22 15:03:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-22 15:03:55,467 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.760869565217391) internal successors, (127), 46 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-22 15:03:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:55,469 INFO L225 Difference]: With dead ends: 941 [2021-11-22 15:03:55,469 INFO L226 Difference]: Without dead ends: 725 [2021-11-22 15:03:55,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1134, Invalid=6871, Unknown=5, NotChecked=0, Total=8010 [2021-11-22 15:03:55,471 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 521 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:55,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 773 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1286 Invalid, 0 Unknown, 291 Unchecked, 0.7s Time] [2021-11-22 15:03:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-11-22 15:03:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 600. [2021-11-22 15:03:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 596 states have (on average 1.1241610738255035) internal successors, (670), 599 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:55,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 670 transitions. [2021-11-22 15:03:55,482 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 670 transitions. Word has length 55 [2021-11-22 15:03:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:55,483 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 670 transitions. [2021-11-22 15:03:55,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.760869565217391) internal successors, (127), 46 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 670 transitions. [2021-11-22 15:03:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-22 15:03:55,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:55,485 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:03:55,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:55,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-22 15:03:55,709 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:03:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:55,710 INFO L85 PathProgramCache]: Analyzing trace with hash 37563779, now seen corresponding path program 2 times [2021-11-22 15:03:55,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:55,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522872665] [2021-11-22 15:03:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:55,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:03:55,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:55,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522872665] [2021-11-22 15:03:55,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522872665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:55,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423874434] [2021-11-22 15:03:55,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:03:55,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:55,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:55,997 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:56,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-22 15:03:56,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:03:56,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:03:56,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-22 15:03:56,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:56,117 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:03:56,118 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 18 treesize of output 19 [2021-11-22 15:03:56,121 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 13 [2021-11-22 15:03:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:03:56,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:57,605 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 [2021-11-22 15:03:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:03:57,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423874434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:57,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:57,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2021-11-22 15:03:57,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075865069] [2021-11-22 15:03:57,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:57,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-22 15:03:57,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:57,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-22 15:03:57,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2021-11-22 15:03:57,627 INFO L87 Difference]: Start difference. First operand 600 states and 670 transitions. Second operand has 42 states, 41 states have (on average 3.5853658536585367) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:00,446 INFO L93 Difference]: Finished difference Result 901 states and 979 transitions. [2021-11-22 15:04:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-22 15:04:00,446 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.5853658536585367) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-22 15:04:00,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:00,449 INFO L225 Difference]: With dead ends: 901 [2021-11-22 15:04:00,450 INFO L226 Difference]: Without dead ends: 870 [2021-11-22 15:04:00,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1392, Invalid=6090, Unknown=0, NotChecked=0, Total=7482 [2021-11-22 15:04:00,451 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 663 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:00,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 564 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 15:04:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-22 15:04:00,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 582. [2021-11-22 15:04:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 578 states have (on average 1.1280276816608996) internal successors, (652), 581 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) [2021-11-22 15:04:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 652 transitions. [2021-11-22 15:04:00,464 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 652 transitions. Word has length 56 [2021-11-22 15:04:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:00,464 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 652 transitions. [2021-11-22 15:04:00,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.5853658536585367) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 652 transitions. [2021-11-22 15:04:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 15:04:00,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:00,466 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:00,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:00,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-22 15:04:00,680 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:04:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:00,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1540257805, now seen corresponding path program 13 times [2021-11-22 15:04:00,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:00,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197112856] [2021-11-22 15:04:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:00,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:01,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:01,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197112856] [2021-11-22 15:04:01,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197112856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:01,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790399095] [2021-11-22 15:04:01,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:04:01,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:01,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:01,105 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:01,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-22 15:04:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-22 15:04:01,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:01,251 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:04:01,251 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 13 treesize of output 18 [2021-11-22 15:04:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 66 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:02,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:04,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790399095] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:04,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:04:04,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 62 [2021-11-22 15:04:04,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067685295] [2021-11-22 15:04:04,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:04,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-22 15:04:04,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-22 15:04:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=3530, Unknown=0, NotChecked=0, Total=3906 [2021-11-22 15:04:04,408 INFO L87 Difference]: Start difference. First operand 582 states and 652 transitions. Second operand has 63 states, 62 states have (on average 2.661290322580645) internal successors, (165), 63 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:06,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:06,899 INFO L93 Difference]: Finished difference Result 920 states and 1005 transitions. [2021-11-22 15:04:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-22 15:04:06,900 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.661290322580645) internal successors, (165), 63 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) Word has length 57 [2021-11-22 15:04:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:06,903 INFO L225 Difference]: With dead ends: 920 [2021-11-22 15:04:06,903 INFO L226 Difference]: Without dead ends: 894 [2021-11-22 15:04:06,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1375, Invalid=9337, Unknown=0, NotChecked=0, Total=10712 [2021-11-22 15:04:06,905 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 831 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 720 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:06,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 1850 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1059 Invalid, 0 Unknown, 720 Unchecked, 0.6s Time] [2021-11-22 15:04:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-11-22 15:04:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 634. [2021-11-22 15:04:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 630 states have (on average 1.1222222222222222) internal successors, (707), 633 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) [2021-11-22 15:04:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 707 transitions. [2021-11-22 15:04:06,917 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 707 transitions. Word has length 57 [2021-11-22 15:04:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:06,918 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 707 transitions. [2021-11-22 15:04:06,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.661290322580645) internal successors, (165), 63 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 707 transitions. [2021-11-22 15:04:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-22 15:04:06,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:06,920 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:06,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:07,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:07,144 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:04:07,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:07,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1575967116, now seen corresponding path program 14 times [2021-11-22 15:04:07,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:07,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752701976] [2021-11-22 15:04:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:07,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:04:07,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:07,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752701976] [2021-11-22 15:04:07,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752701976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:07,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506141725] [2021-11-22 15:04:07,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:04:07,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:07,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:07,592 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:07,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-22 15:04:07,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:04:07,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:04:07,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-22 15:04:07,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:07,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:04:08,069 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 28 treesize of output 24 [2021-11-22 15:04:08,129 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-22 15:04:08,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-22 15:04:09,324 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-22 15:04:09,324 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 45 treesize of output 27 [2021-11-22 15:04:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:04:09,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:10,579 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)) is different from false [2021-11-22 15:04:10,583 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 62 treesize of output 56 [2021-11-22 15:04:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:04:11,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506141725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:11,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:04:11,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 55 [2021-11-22 15:04:11,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573776618] [2021-11-22 15:04:11,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:11,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-22 15:04:11,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:11,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-22 15:04:11,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2702, Unknown=1, NotChecked=104, Total=2970 [2021-11-22 15:04:11,097 INFO L87 Difference]: Start difference. First operand 634 states and 707 transitions. Second operand has 55 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 55 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:15,253 INFO L93 Difference]: Finished difference Result 1299 states and 1413 transitions. [2021-11-22 15:04:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-22 15:04:15,253 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 55 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-22 15:04:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:15,257 INFO L225 Difference]: With dead ends: 1299 [2021-11-22 15:04:15,258 INFO L226 Difference]: Without dead ends: 1234 [2021-11-22 15:04:15,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=248, Invalid=4043, Unknown=3, NotChecked=128, Total=4422 [2021-11-22 15:04:15,258 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 262 mSDsluCounter, 2871 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 2986 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1183 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:15,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 2986 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1390 Invalid, 0 Unknown, 1183 Unchecked, 0.6s Time] [2021-11-22 15:04:15,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-11-22 15:04:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 678. [2021-11-22 15:04:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 674 states have (on average 1.1261127596439169) internal successors, (759), 677 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 759 transitions. [2021-11-22 15:04:15,275 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 759 transitions. Word has length 59 [2021-11-22 15:04:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:15,275 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 759 transitions. [2021-11-22 15:04:15,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 55 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 759 transitions. [2021-11-22 15:04:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-22 15:04:15,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:15,277 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2021-11-22 15:04:15,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:15,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-22 15:04:15,492 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:04:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash -105949010, now seen corresponding path program 5 times [2021-11-22 15:04:15,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:15,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484786413] [2021-11-22 15:04:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:15,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 15:04:15,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:15,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484786413] [2021-11-22 15:04:15,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484786413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:15,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928886776] [2021-11-22 15:04:15,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:04:15,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:15,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:15,703 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:15,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-22 15:04:15,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 15:04:15,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:04:15,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-22 15:04:15,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:15,881 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:04:15,881 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 [2021-11-22 15:04:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 15:04:16,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 15:04:16,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928886776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:16,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:04:16,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2021-11-22 15:04:16,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579510454] [2021-11-22 15:04:16,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:16,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-22 15:04:16,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:16,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-22 15:04:16,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-11-22 15:04:16,726 INFO L87 Difference]: Start difference. First operand 678 states and 759 transitions. Second operand has 29 states, 28 states have (on average 4.607142857142857) internal successors, (129), 29 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) [2021-11-22 15:04:17,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:17,262 INFO L93 Difference]: Finished difference Result 848 states and 925 transitions. [2021-11-22 15:04:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-22 15:04:17,262 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.607142857142857) internal successors, (129), 29 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) Word has length 59 [2021-11-22 15:04:17,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:17,266 INFO L225 Difference]: With dead ends: 848 [2021-11-22 15:04:17,266 INFO L226 Difference]: Without dead ends: 848 [2021-11-22 15:04:17,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=366, Invalid=1440, Unknown=0, NotChecked=0, Total=1806 [2021-11-22 15:04:17,267 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 298 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:17,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 364 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:04:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-22 15:04:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 727. [2021-11-22 15:04:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 723 states have (on average 1.1175656984785616) internal successors, (808), 726 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 808 transitions. [2021-11-22 15:04:17,281 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 808 transitions. Word has length 59 [2021-11-22 15:04:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:17,281 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 808 transitions. [2021-11-22 15:04:17,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.607142857142857) internal successors, (129), 29 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) [2021-11-22 15:04:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 808 transitions. [2021-11-22 15:04:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-22 15:04:17,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:17,283 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:17,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:17,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-22 15:04:17,508 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:04:17,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:17,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2039963443, now seen corresponding path program 3 times [2021-11-22 15:04:17,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:17,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755040827] [2021-11-22 15:04:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:17,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:04:17,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755040827] [2021-11-22 15:04:17,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755040827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981789935] [2021-11-22 15:04:17,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:04:17,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:17,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:17,841 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:17,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-22 15:04:17,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-22 15:04:17,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:04:17,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-22 15:04:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:18,031 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:04:18,032 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 18 treesize of output 19 [2021-11-22 15:04:18,035 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 13 [2021-11-22 15:04:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:04:18,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:19,871 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 [2021-11-22 15:04:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:04:19,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981789935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:19,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:04:19,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2021-11-22 15:04:19,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015307916] [2021-11-22 15:04:19,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:19,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-22 15:04:19,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-22 15:04:19,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2021-11-22 15:04:19,893 INFO L87 Difference]: Start difference. First operand 727 states and 808 transitions. Second operand has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:23,648 INFO L93 Difference]: Finished difference Result 1232 states and 1324 transitions. [2021-11-22 15:04:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-22 15:04:23,649 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 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) Word has length 62 [2021-11-22 15:04:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:23,653 INFO L225 Difference]: With dead ends: 1232 [2021-11-22 15:04:23,653 INFO L226 Difference]: Without dead ends: 1199 [2021-11-22 15:04:23,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1882, Invalid=8018, Unknown=0, NotChecked=0, Total=9900 [2021-11-22 15:04:23,654 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 917 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:23,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 871 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 15:04:23,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-11-22 15:04:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 695. [2021-11-22 15:04:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 691 states have (on average 1.1186685962373373) internal successors, (773), 694 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 773 transitions. [2021-11-22 15:04:23,666 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 773 transitions. Word has length 62 [2021-11-22 15:04:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:23,666 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 773 transitions. [2021-11-22 15:04:23,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 773 transitions. [2021-11-22 15:04:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-22 15:04:23,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:23,669 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:23,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:23,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:23,884 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:04:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:23,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1265880983, now seen corresponding path program 15 times [2021-11-22 15:04:23,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:23,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163646024] [2021-11-22 15:04:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:23,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 66 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:24,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:24,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163646024] [2021-11-22 15:04:24,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163646024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:24,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415167955] [2021-11-22 15:04:24,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:04:24,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:24,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:24,324 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:24,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-22 15:04:24,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-22 15:04:24,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:04:24,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-22 15:04:24,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:24,520 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:04:24,520 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 18 treesize of output 19 [2021-11-22 15:04:24,525 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 13 [2021-11-22 15:04:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 91 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:25,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:26,475 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 [2021-11-22 15:04:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 120 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:26,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415167955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:26,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:04:26,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 62 [2021-11-22 15:04:26,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380415926] [2021-11-22 15:04:26,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:26,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-22 15:04:26,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:26,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-22 15:04:26,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=3389, Unknown=0, NotChecked=0, Total=3906 [2021-11-22 15:04:26,484 INFO L87 Difference]: Start difference. First operand 695 states and 773 transitions. Second operand has 63 states, 62 states have (on average 2.8870967741935485) internal successors, (179), 63 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:28,519 INFO L93 Difference]: Finished difference Result 1598 states and 1721 transitions. [2021-11-22 15:04:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-22 15:04:28,520 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.8870967741935485) internal successors, (179), 63 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-22 15:04:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:28,525 INFO L225 Difference]: With dead ends: 1598 [2021-11-22 15:04:28,526 INFO L226 Difference]: Without dead ends: 1572 [2021-11-22 15:04:28,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1639, Invalid=6551, Unknown=0, NotChecked=0, Total=8190 [2021-11-22 15:04:28,526 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 1181 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:28,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 1257 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 15:04:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-11-22 15:04:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 759. [2021-11-22 15:04:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 755 states have (on average 1.1125827814569536) internal successors, (840), 758 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 840 transitions. [2021-11-22 15:04:28,540 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 840 transitions. Word has length 63 [2021-11-22 15:04:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:28,541 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 840 transitions. [2021-11-22 15:04:28,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.8870967741935485) internal successors, (179), 63 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 840 transitions. [2021-11-22 15:04:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-22 15:04:28,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:28,543 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:28,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:28,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:28,764 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:04:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash -749215359, now seen corresponding path program 1 times [2021-11-22 15:04:28,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:28,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773023425] [2021-11-22 15:04:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:28,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 15:04:29,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773023425] [2021-11-22 15:04:29,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773023425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741021352] [2021-11-22 15:04:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:29,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:29,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:29,065 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:29,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-22 15:04:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-22 15:04:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:29,152 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:04:29,152 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 18 treesize of output 19 [2021-11-22 15:04:29,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-22 15:04:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 15:04:29,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:31,075 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 [2021-11-22 15:04:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 15:04:31,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741021352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:31,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:04:31,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 48 [2021-11-22 15:04:31,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984802227] [2021-11-22 15:04:31,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:31,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-22 15:04:31,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-22 15:04:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1984, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 15:04:31,092 INFO L87 Difference]: Start difference. First operand 759 states and 840 transitions. Second operand has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:33,462 INFO L93 Difference]: Finished difference Result 1201 states and 1293 transitions. [2021-11-22 15:04:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-22 15:04:33,463 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-22 15:04:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:33,467 INFO L225 Difference]: With dead ends: 1201 [2021-11-22 15:04:33,467 INFO L226 Difference]: Without dead ends: 1201 [2021-11-22 15:04:33,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1907, Invalid=6465, Unknown=0, NotChecked=0, Total=8372 [2021-11-22 15:04:33,468 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 664 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:33,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 441 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 15:04:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-11-22 15:04:33,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 771. [2021-11-22 15:04:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 767 states have (on average 1.1160365058670143) internal successors, (856), 770 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 856 transitions. [2021-11-22 15:04:33,477 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 856 transitions. Word has length 64 [2021-11-22 15:04:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:33,477 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 856 transitions. [2021-11-22 15:04:33,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 856 transitions. [2021-11-22 15:04:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 15:04:33,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:33,479 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:33,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:33,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-22 15:04:33,699 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:04:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:33,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1035879294, now seen corresponding path program 16 times [2021-11-22 15:04:33,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:33,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482285660] [2021-11-22 15:04:33,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:33,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 27 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:04:34,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482285660] [2021-11-22 15:04:34,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482285660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742955672] [2021-11-22 15:04:34,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:04:34,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:34,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:34,158 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:34,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-22 15:04:34,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:04:34,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:04:34,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-22 15:04:34,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:34,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:04:34,280 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 [2021-11-22 15:04:35,130 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 29 treesize of output 25 [2021-11-22 15:04:35,188 INFO L354 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2021-11-22 15:04:35,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-22 15:04:36,349 INFO L354 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2021-11-22 15:04:36,350 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 48 treesize of output 37 [2021-11-22 15:04:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 83 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:36,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:38,563 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 62 treesize of output 58 [2021-11-22 15:04:39,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2021-11-22 15:04:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 76 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:39,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742955672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:39,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:04:39,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 27] total 73 [2021-11-22 15:04:39,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630294678] [2021-11-22 15:04:39,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:39,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-22 15:04:39,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:39,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-22 15:04:39,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=4798, Unknown=1, NotChecked=0, Total=5256 [2021-11-22 15:04:39,800 INFO L87 Difference]: Start difference. First operand 771 states and 856 transitions. Second operand has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:42,902 INFO L93 Difference]: Finished difference Result 1973 states and 2115 transitions. [2021-11-22 15:04:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-22 15:04:42,902 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 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 65 [2021-11-22 15:04:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:42,908 INFO L225 Difference]: With dead ends: 1973 [2021-11-22 15:04:42,909 INFO L226 Difference]: Without dead ends: 1879 [2021-11-22 15:04:42,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2661 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=925, Invalid=10846, Unknown=1, NotChecked=0, Total=11772 [2021-11-22 15:04:42,910 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 291 mSDsluCounter, 4099 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 4246 SdHoareTripleChecker+Invalid, 3682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 617 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:42,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 4246 Invalid, 3682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3011 Invalid, 0 Unknown, 617 Unchecked, 1.4s Time] [2021-11-22 15:04:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-11-22 15:04:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 817. [2021-11-22 15:04:42,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 813 states have (on average 1.120541205412054) internal successors, (911), 816 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 911 transitions. [2021-11-22 15:04:42,924 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 911 transitions. Word has length 65 [2021-11-22 15:04:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:42,924 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 911 transitions. [2021-11-22 15:04:42,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 911 transitions. [2021-11-22 15:04:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 15:04:42,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:42,926 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2021-11-22 15:04:42,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:43,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:43,129 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:04:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash 229195360, now seen corresponding path program 6 times [2021-11-22 15:04:43,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:43,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150959972] [2021-11-22 15:04:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:43,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:43,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:43,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150959972] [2021-11-22 15:04:43,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150959972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:43,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318828652] [2021-11-22 15:04:43,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:04:43,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:43,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:43,901 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:43,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-22 15:04:44,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-22 15:04:44,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:04:44,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-22 15:04:44,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:44,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:04:44,049 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 [2021-11-22 15:04:44,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2021-11-22 15:04:44,753 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 23 treesize of output 19 [2021-11-22 15:04:44,987 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 27 treesize of output 26 [2021-11-22 15:04:45,158 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 27 treesize of output 26 [2021-11-22 15:04:45,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:04:45,417 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-22 15:04:45,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2021-11-22 15:04:45,862 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-11-22 15:04:45,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 31 [2021-11-22 15:04:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:45,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:47,085 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-22 15:04:47,086 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 122431 treesize of output 119911 [2021-11-22 15:04:53,847 WARN L227 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 413 DAG size of output: 402 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-22 15:04:53,855 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-22 15:04:53,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:04:53,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-22 15:04:53,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224047100] [2021-11-22 15:04:53,855 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:53,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 15:04:53,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 15:04:53,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=3096, Unknown=0, NotChecked=0, Total=3306 [2021-11-22 15:04:53,856 INFO L87 Difference]: Start difference. First operand 817 states and 911 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:55,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:55,316 INFO L93 Difference]: Finished difference Result 891 states and 982 transitions. [2021-11-22 15:04:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-22 15:04:55,317 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-22 15:04:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:55,319 INFO L225 Difference]: With dead ends: 891 [2021-11-22 15:04:55,319 INFO L226 Difference]: Without dead ends: 794 [2021-11-22 15:04:55,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=517, Invalid=5183, Unknown=0, NotChecked=0, Total=5700 [2021-11-22 15:04:55,320 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 103 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:55,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 435 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 15:04:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-11-22 15:04:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 794. [2021-11-22 15:04:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 790 states have (on average 1.1177215189873417) internal successors, (883), 793 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) [2021-11-22 15:04:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 883 transitions. [2021-11-22 15:04:55,327 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 883 transitions. Word has length 65 [2021-11-22 15:04:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:55,327 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 883 transitions. [2021-11-22 15:04:55,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 883 transitions. [2021-11-22 15:04:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-22 15:04:55,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:55,328 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:55,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:55,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:55,530 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:04:55,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1839858857, now seen corresponding path program 4 times [2021-11-22 15:04:55,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:55,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640399222] [2021-11-22 15:04:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:55,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:04:55,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640399222] [2021-11-22 15:04:55,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640399222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636212987] [2021-11-22 15:04:55,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:04:55,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:55,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:55,862 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:55,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-22 15:04:55,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:04:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:04:55,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-22 15:04:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:55,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:04:55,941 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 [2021-11-22 15:04:56,259 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 18 treesize of output 14 [2021-11-22 15:04:56,296 INFO L354 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2021-11-22 15:04:56,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-22 15:04:56,672 INFO L354 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2021-11-22 15:04:56,672 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 38 treesize of output 27 [2021-11-22 15:04:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-22 15:04:56,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:58,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-22 15:04:58,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-22 15:04:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-22 15:04:58,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636212987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:58,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:04:58,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 48 [2021-11-22 15:04:58,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856454281] [2021-11-22 15:04:58,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:58,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-22 15:04:58,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:58,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-22 15:04:58,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 15:04:58,356 INFO L87 Difference]: Start difference. First operand 794 states and 883 transitions. Second operand has 49 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:00,821 INFO L93 Difference]: Finished difference Result 987 states and 1079 transitions. [2021-11-22 15:05:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-22 15:05:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-22 15:05:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:00,825 INFO L225 Difference]: With dead ends: 987 [2021-11-22 15:05:00,825 INFO L226 Difference]: Without dead ends: 973 [2021-11-22 15:05:00,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 113 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1108, Invalid=8594, Unknown=0, NotChecked=0, Total=9702 [2021-11-22 15:05:00,826 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 151 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:00,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 673 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 917 Invalid, 0 Unknown, 379 Unchecked, 0.4s Time] [2021-11-22 15:05:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-22 15:05:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 695. [2021-11-22 15:05:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 692 states have (on average 1.111271676300578) internal successors, (769), 694 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 769 transitions. [2021-11-22 15:05:00,837 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 769 transitions. Word has length 68 [2021-11-22 15:05:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:00,837 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 769 transitions. [2021-11-22 15:05:00,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 769 transitions. [2021-11-22 15:05:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-22 15:05:00,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:00,839 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:00,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-22 15:05:01,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-22 15:05:01,053 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:05:01,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:01,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1839867893, now seen corresponding path program 2 times [2021-11-22 15:05:01,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:01,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514713239] [2021-11-22 15:05:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:01,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 70 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:05:01,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:01,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514713239] [2021-11-22 15:05:01,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514713239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:01,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800058752] [2021-11-22 15:05:01,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:05:01,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:01,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:01,469 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:01,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-22 15:05:01,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:05:01,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:05:01,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-22 15:05:01,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:01,582 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:05:01,582 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 18 treesize of output 19 [2021-11-22 15:05:01,586 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 13 [2021-11-22 15:05:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:05:02,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:05:03,351 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 [2021-11-22 15:05:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 45 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 15:05:03,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800058752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:05:03,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:05:03,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 52 [2021-11-22 15:05:03,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625645246] [2021-11-22 15:05:03,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:05:03,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-22 15:05:03,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:03,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-22 15:05:03,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2429, Unknown=0, NotChecked=0, Total=2756 [2021-11-22 15:05:03,368 INFO L87 Difference]: Start difference. First operand 695 states and 769 transitions. Second operand has 53 states, 52 states have (on average 3.5) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:05,220 INFO L93 Difference]: Finished difference Result 1120 states and 1203 transitions. [2021-11-22 15:05:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 15:05:05,220 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 3.5) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-22 15:05:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:05,224 INFO L225 Difference]: With dead ends: 1120 [2021-11-22 15:05:05,224 INFO L226 Difference]: Without dead ends: 1089 [2021-11-22 15:05:05,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1206, Invalid=4956, Unknown=0, NotChecked=0, Total=6162 [2021-11-22 15:05:05,225 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 405 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:05,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 721 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 15:05:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-11-22 15:05:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 706. [2021-11-22 15:05:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 703 states have (on average 1.1166429587482218) internal successors, (785), 705 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 785 transitions. [2021-11-22 15:05:05,233 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 785 transitions. Word has length 68 [2021-11-22 15:05:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:05,233 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 785 transitions. [2021-11-22 15:05:05,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 3.5) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 785 transitions. [2021-11-22 15:05:05,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 15:05:05,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:05,235 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:05,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-22 15:05:05,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:05,456 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:05:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash -735626849, now seen corresponding path program 17 times [2021-11-22 15:05:05,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:05,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428712567] [2021-11-22 15:05:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:05,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 91 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:05,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428712567] [2021-11-22 15:05:05,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428712567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140088170] [2021-11-22 15:05:05,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:05:05,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:05,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:05,953 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:05,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-22 15:05:06,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-22 15:05:06,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:05:06,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-22 15:05:06,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:06,117 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:05:06,117 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 18 treesize of output 19 [2021-11-22 15:05:06,121 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 13 [2021-11-22 15:05:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 120 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:07,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:05:08,295 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 [2021-11-22 15:05:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 153 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:08,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140088170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:05:08,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:05:08,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 64 [2021-11-22 15:05:08,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258120305] [2021-11-22 15:05:08,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:05:08,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-22 15:05:08,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-22 15:05:08,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=3635, Unknown=0, NotChecked=0, Total=4160 [2021-11-22 15:05:08,304 INFO L87 Difference]: Start difference. First operand 706 states and 785 transitions. Second operand has 65 states, 64 states have (on average 3.03125) internal successors, (194), 65 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:10,309 INFO L93 Difference]: Finished difference Result 1686 states and 1798 transitions. [2021-11-22 15:05:10,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 15:05:10,309 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.03125) internal successors, (194), 65 states have internal predecessors, (194), 0 states have call successors, (0), 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 [2021-11-22 15:05:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:10,315 INFO L225 Difference]: With dead ends: 1686 [2021-11-22 15:05:10,315 INFO L226 Difference]: Without dead ends: 1670 [2021-11-22 15:05:10,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1424, Invalid=6058, Unknown=0, NotChecked=0, Total=7482 [2021-11-22 15:05:10,316 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 735 mSDsluCounter, 2074 mSDsCounter, 0 mSdLazyCounter, 2976 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:10,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 2181 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2976 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-22 15:05:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-11-22 15:05:10,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 741. [2021-11-22 15:05:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 738 states have (on average 1.113821138211382) internal successors, (822), 740 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 822 transitions. [2021-11-22 15:05:10,331 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 822 transitions. Word has length 69 [2021-11-22 15:05:10,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:10,331 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 822 transitions. [2021-11-22 15:05:10,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.03125) internal successors, (194), 65 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 822 transitions. [2021-11-22 15:05:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 15:05:10,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:10,333 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:10,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-22 15:05:10,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-22 15:05:10,541 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 15:05:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:10,541 INFO L85 PathProgramCache]: Analyzing trace with hash -234579075, now seen corresponding path program 7 times [2021-11-22 15:05:10,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:10,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559746393] [2021-11-22 15:05:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:10,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:11,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:11,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559746393] [2021-11-22 15:05:11,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559746393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:11,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649280270] [2021-11-22 15:05:11,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:05:11,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:11,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:11,209 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:11,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf7e350-4e7b-452b-a651-1d44fc63400c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-22 15:05:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:11,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-22 15:05:11,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:11,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 15:05:11,526 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 21 treesize of output 17 [2021-11-22 15:05:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:05:11,696 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 21 treesize of output 20 [2021-11-22 15:05:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:05:11,828 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 21 treesize of output 20 [2021-11-22 15:05:11,978 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-22 15:05:11,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-11-22 15:05:12,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:05:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 15:05:12,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:05:12,722 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncat_#t~mem5#1| Int) (|ULTIMATE.start_cstrncat_~s~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |ULTIMATE.start_cstrncat_~s~0#1.offset| |ULTIMATE.start_cstrncat_#t~mem5#1|)) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2021-11-22 15:05:13,490 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncat_#t~mem5#1| Int) (|ULTIMATE.start_cstrncat_~s~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |ULTIMATE.start_cstrncat_~s~0#1.offset| |ULTIMATE.start_cstrncat_#t~mem5#1|)) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2021-11-22 15:05:20,710 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncat_#t~mem5#1| Int) (|ULTIMATE.start_cstrncat_~s~0#1.offset| Int) (|v_ULTIMATE.start_cstrncat_~s~0#1.offset_367| Int) (|v_ULTIMATE.start_cstrncat_#t~mem5#1_139| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |ULTIMATE.start_cstrncat_~s~0#1.offset| |ULTIMATE.start_cstrncat_#t~mem5#1|) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_367| |v_ULTIMATE.start_cstrncat_#t~mem5#1_139|)) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 2)) 0)) is different from false [2021-11-22 15:05:40,682 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncat_#t~mem5#1| Int) (|v_ULTIMATE.start_cstrncat_#t~mem5#1_142| Int) (|ULTIMATE.start_cstrncat_~s~0#1.offset| Int) (|v_ULTIMATE.start_cstrncat_~s~0#1.offset_369| Int) (|v_ULTIMATE.start_cstrncat_~s~0#1.offset_367| Int) (|v_ULTIMATE.start_cstrncat_#t~mem5#1_139| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |ULTIMATE.start_cstrncat_~s~0#1.offset| |ULTIMATE.start_cstrncat_#t~mem5#1|) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_369| |v_ULTIMATE.start_cstrncat_#t~mem5#1_142|) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_367| |v_ULTIMATE.start_cstrncat_#t~mem5#1_139|)) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 3)) 0)) is different from false [2021-11-22 15:05:40,690 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 6266 treesize of output 6170