./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0504.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_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/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_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0504.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/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_ae3510a8-964a-4297-b0e9-13b5e825d0e3/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 cddde357ab55a506b6049f3b60959cd723bf2cbfd36f7774fe3606d53024bbf3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:16:37,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:16:37,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:16:37,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:16:37,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:16:37,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:16:37,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:16:37,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:16:37,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:16:37,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:16:37,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:16:37,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:16:37,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:16:37,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:16:37,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:16:37,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:16:37,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:16:37,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:16:37,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:16:37,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:16:37,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:16:37,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:16:37,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:16:37,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:16:37,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:16:37,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:16:37,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:16:37,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:16:37,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:16:37,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:16:37,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:16:37,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:16:37,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:16:37,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:16:37,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:16:37,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:16:37,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:16:37,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:16:37,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:16:37,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:16:37,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:16:37,543 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-22 16:16:37,568 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:16:37,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:16:37,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:16:37,569 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:16:37,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:16:37,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:16:37,573 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:16:37,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:16:37,573 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:16:37,574 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 16:16:37,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:16:37,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:16:37,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:16:37,580 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 16:16:37,581 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 16:16:37,581 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 16:16:37,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:16:37,581 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 16:16:37,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:16:37,582 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:16:37,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:16:37,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:16:37,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:16:37,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:16:37,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:16:37,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:16:37,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:16:37,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:16:37,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:16:37,584 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_ae3510a8-964a-4297-b0e9-13b5e825d0e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cddde357ab55a506b6049f3b60959cd723bf2cbfd36f7774fe3606d53024bbf3 [2021-11-22 16:16:37,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:16:37,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:16:37,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:16:37,878 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:16:37,879 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:16:37,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/memsafety/test-0504.i [2021-11-22 16:16:37,946 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/data/5388322c5/5efd05ffa9a4400b9a9acac2e7012caf/FLAG1124f18cd [2021-11-22 16:16:38,468 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:16:38,469 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/sv-benchmarks/c/memsafety/test-0504.i [2021-11-22 16:16:38,482 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/data/5388322c5/5efd05ffa9a4400b9a9acac2e7012caf/FLAG1124f18cd [2021-11-22 16:16:38,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/data/5388322c5/5efd05ffa9a4400b9a9acac2e7012caf [2021-11-22 16:16:38,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:16:38,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:16:38,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:16:38,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:16:38,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:16:38,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:16:38" (1/1) ... [2021-11-22 16:16:38,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e178b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:38, skipping insertion in model container [2021-11-22 16:16:38,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:16:38" (1/1) ... [2021-11-22 16:16:38,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:16:38,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:16:39,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:16:39,185 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:16:39,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:16:39,254 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:16:39,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39 WrapperNode [2021-11-22 16:16:39,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:16:39,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:16:39,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:16:39,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:16:39,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39" (1/1) ... [2021-11-22 16:16:39,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39" (1/1) ... [2021-11-22 16:16:39,319 INFO L137 Inliner]: procedures = 123, calls = 27, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 86 [2021-11-22 16:16:39,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:16:39,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:16:39,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:16:39,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:16:39,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39" (1/1) ... [2021-11-22 16:16:39,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39" (1/1) ... [2021-11-22 16:16:39,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39" (1/1) ... [2021-11-22 16:16:39,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39" (1/1) ... [2021-11-22 16:16:39,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39" (1/1) ... [2021-11-22 16:16:39,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39" (1/1) ... [2021-11-22 16:16:39,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39" (1/1) ... [2021-11-22 16:16:39,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:16:39,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:16:39,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:16:39,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:16:39,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39" (1/1) ... [2021-11-22 16:16:39,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:16:39,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:39,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:16:39,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:16:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 16:16:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 16:16:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:16:39,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-22 16:16:39,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 16:16:39,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:16:39,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:16:39,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:16:39,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:16:39,562 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:16:39,563 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:16:40,024 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:16:40,032 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:16:40,032 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-22 16:16:40,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:16:40 BoogieIcfgContainer [2021-11-22 16:16:40,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:16:40,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:16:40,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:16:40,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:16:40,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:16:38" (1/3) ... [2021-11-22 16:16:40,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b1ded1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:16:40, skipping insertion in model container [2021-11-22 16:16:40,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:39" (2/3) ... [2021-11-22 16:16:40,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b1ded1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:16:40, skipping insertion in model container [2021-11-22 16:16:40,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:16:40" (3/3) ... [2021-11-22 16:16:40,047 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0504.i [2021-11-22 16:16:40,058 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:16:40,058 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-11-22 16:16:40,118 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:16:40,135 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 16:16:40,135 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-11-22 16:16:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 16:16:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-22 16:16:40,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:40,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-22 16:16:40,181 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash 28780379, now seen corresponding path program 1 times [2021-11-22 16:16:40,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:40,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656406986] [2021-11-22 16:16:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:40,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:40,343 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 16:16:40,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:40,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656406986] [2021-11-22 16:16:40,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656406986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:40,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:40,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:16:40,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524378434] [2021-11-22 16:16:40,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:40,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 16:16:40,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 16:16:40,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:16:40,385 INFO L87 Difference]: Start difference. First operand has 87 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states 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 16:16:40,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:40,404 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-11-22 16:16:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 16:16:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-22 16:16:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:40,415 INFO L225 Difference]: With dead ends: 87 [2021-11-22 16:16:40,416 INFO L226 Difference]: Without dead ends: 85 [2021-11-22 16:16:40,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:16:40,422 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:40,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:16:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-22 16:16:40,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-22 16:16:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 44 states have (on average 2.022727272727273) internal successors, (89), 84 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 16:16:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-11-22 16:16:40,477 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 5 [2021-11-22 16:16:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:40,478 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-11-22 16:16:40,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states 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 16:16:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-11-22 16:16:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 16:16:40,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:40,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 16:16:40,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:16:40,480 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash 889572104, now seen corresponding path program 1 times [2021-11-22 16:16:40,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:40,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373759386] [2021-11-22 16:16:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:40,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:40,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:40,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373759386] [2021-11-22 16:16:40,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373759386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:40,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:40,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:16:40,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503057155] [2021-11-22 16:16:40,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:40,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:16:40,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:40,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:16:40,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:16:40,587 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:40,647 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2021-11-22 16:16:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:16:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-22 16:16:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:40,653 INFO L225 Difference]: With dead ends: 133 [2021-11-22 16:16:40,654 INFO L226 Difference]: Without dead ends: 133 [2021-11-22 16:16:40,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:16:40,658 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:40,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 165 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:16:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-22 16:16:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 109. [2021-11-22 16:16:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 108 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2021-11-22 16:16:40,687 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 6 [2021-11-22 16:16:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:40,689 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2021-11-22 16:16:40,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2021-11-22 16:16:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 16:16:40,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:40,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 16:16:40,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:16:40,693 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:40,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash 889571339, now seen corresponding path program 1 times [2021-11-22 16:16:40,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:40,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097821671] [2021-11-22 16:16:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:40,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:40,745 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 16:16:40,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:40,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097821671] [2021-11-22 16:16:40,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097821671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:40,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:40,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:16:40,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463611367] [2021-11-22 16:16:40,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:40,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:16:40,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:16:40,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:16:40,749 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:40,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:40,857 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2021-11-22 16:16:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:16:40,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-22 16:16:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:40,859 INFO L225 Difference]: With dead ends: 130 [2021-11-22 16:16:40,860 INFO L226 Difference]: Without dead ends: 130 [2021-11-22 16:16:40,860 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 16:16:40,862 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 74 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:40,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 64 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-22 16:16:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 101. [2021-11-22 16:16:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.8235294117647058) internal successors, (124), 100 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 16:16:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2021-11-22 16:16:40,872 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 6 [2021-11-22 16:16:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:40,872 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2021-11-22 16:16:40,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2021-11-22 16:16:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 16:16:40,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:40,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 16:16:40,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 16:16:40,874 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:40,875 INFO L85 PathProgramCache]: Analyzing trace with hash 889571340, now seen corresponding path program 1 times [2021-11-22 16:16:40,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:40,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846742649] [2021-11-22 16:16:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:40,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:40,929 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 16:16:40,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:40,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846742649] [2021-11-22 16:16:40,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846742649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:40,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:40,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:16:40,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316460952] [2021-11-22 16:16:40,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:40,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:16:40,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:40,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:16:40,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:16:40,935 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:41,065 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2021-11-22 16:16:41,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:16:41,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-22 16:16:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:41,067 INFO L225 Difference]: With dead ends: 138 [2021-11-22 16:16:41,068 INFO L226 Difference]: Without dead ends: 138 [2021-11-22 16:16:41,068 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 16:16:41,070 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:41,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 102 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-22 16:16:41,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2021-11-22 16:16:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:16:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2021-11-22 16:16:41,080 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 6 [2021-11-22 16:16:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:41,080 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2021-11-22 16:16:41,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,081 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2021-11-22 16:16:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 16:16:41,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:41,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:41,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 16:16:41,082 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1806930847, now seen corresponding path program 1 times [2021-11-22 16:16:41,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:41,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414926059] [2021-11-22 16:16:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:41,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:41,116 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 16:16:41,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:41,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414926059] [2021-11-22 16:16:41,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414926059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:41,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:41,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:16:41,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814669546] [2021-11-22 16:16:41,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:41,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:16:41,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:16:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:16:41,120 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:41,182 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2021-11-22 16:16:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:16:41,183 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 16:16:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:41,186 INFO L225 Difference]: With dead ends: 103 [2021-11-22 16:16:41,187 INFO L226 Difference]: Without dead ends: 100 [2021-11-22 16:16:41,187 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 16:16:41,194 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:41,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-22 16:16:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-22 16:16:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 99 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-11-22 16:16:41,216 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 7 [2021-11-22 16:16:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:41,216 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-11-22 16:16:41,216 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 16:16:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-11-22 16:16:41,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 16:16:41,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:41,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:41,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 16:16:41,224 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1857997403, now seen corresponding path program 1 times [2021-11-22 16:16:41,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:41,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115540633] [2021-11-22 16:16:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:41,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:41,393 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 16:16:41,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:41,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115540633] [2021-11-22 16:16:41,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115540633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:41,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:41,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:16:41,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951377354] [2021-11-22 16:16:41,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:41,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:16:41,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:41,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:16:41,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:16:41,398 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:41,559 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2021-11-22 16:16:41,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:16:41,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 16:16:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:41,561 INFO L225 Difference]: With dead ends: 126 [2021-11-22 16:16:41,561 INFO L226 Difference]: Without dead ends: 126 [2021-11-22 16:16:41,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:16:41,569 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 154 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:41,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 68 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:41,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-22 16:16:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 92. [2021-11-22 16:16:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 91 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 16:16:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2021-11-22 16:16:41,582 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 15 [2021-11-22 16:16:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:41,582 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2021-11-22 16:16:41,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2021-11-22 16:16:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 16:16:41,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:41,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:41,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 16:16:41,584 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:41,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1763344638, now seen corresponding path program 1 times [2021-11-22 16:16:41,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:41,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842336511] [2021-11-22 16:16:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:41,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:41,682 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 16:16:41,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842336511] [2021-11-22 16:16:41,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842336511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:41,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:41,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:16:41,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923379866] [2021-11-22 16:16:41,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:41,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:16:41,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:41,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:16:41,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:16:41,685 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:41,743 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2021-11-22 16:16:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:16:41,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-22 16:16:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:41,744 INFO L225 Difference]: With dead ends: 88 [2021-11-22 16:16:41,744 INFO L226 Difference]: Without dead ends: 88 [2021-11-22 16:16:41,744 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 16:16:41,745 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 14 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:41,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 84 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-22 16:16:41,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-22 16:16:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 87 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2021-11-22 16:16:41,751 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 16 [2021-11-22 16:16:41,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:41,751 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2021-11-22 16:16:41,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2021-11-22 16:16:41,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 16:16:41,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:41,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:41,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 16:16:41,753 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:41,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1763344639, now seen corresponding path program 1 times [2021-11-22 16:16:41,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:41,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478913447] [2021-11-22 16:16:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:41,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:41,808 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 16:16:41,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:41,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478913447] [2021-11-22 16:16:41,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478913447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:41,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:41,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:16:41,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272915552] [2021-11-22 16:16:41,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:41,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:16:41,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:41,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:16:41,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:16:41,811 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:41,855 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-11-22 16:16:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:16:41,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-22 16:16:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:41,856 INFO L225 Difference]: With dead ends: 84 [2021-11-22 16:16:41,857 INFO L226 Difference]: Without dead ends: 84 [2021-11-22 16:16:41,857 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 16:16:41,858 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:41,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:16:41,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-22 16:16:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-22 16:16:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 83 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 16:16:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2021-11-22 16:16:41,864 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 16 [2021-11-22 16:16:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:41,864 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2021-11-22 16:16:41,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2021-11-22 16:16:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 16:16:41,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:41,866 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 16:16:41,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 16:16:41,867 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:41,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:41,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1967864768, now seen corresponding path program 1 times [2021-11-22 16:16:41,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:41,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325140468] [2021-11-22 16:16:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:41,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:41,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:41,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325140468] [2021-11-22 16:16:41,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325140468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:41,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:41,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:16:41,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775188591] [2021-11-22 16:16:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:41,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:16:41,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:16:41,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:16:41,963 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 16:16:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:42,081 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2021-11-22 16:16:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:16:42,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 16:16:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:42,083 INFO L225 Difference]: With dead ends: 114 [2021-11-22 16:16:42,083 INFO L226 Difference]: Without dead ends: 114 [2021-11-22 16:16:42,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 16:16:42,084 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 83 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:42,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 84 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:42,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-22 16:16:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2021-11-22 16:16:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 85 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-11-22 16:16:42,088 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 18 [2021-11-22 16:16:42,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:42,089 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-11-22 16:16:42,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 16:16:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-11-22 16:16:42,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 16:16:42,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:42,090 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 16:16:42,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 16:16:42,090 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:42,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1967864767, now seen corresponding path program 1 times [2021-11-22 16:16:42,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:42,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285838569] [2021-11-22 16:16:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:42,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:42,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:42,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285838569] [2021-11-22 16:16:42,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285838569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:42,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:42,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:16:42,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598416687] [2021-11-22 16:16:42,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:42,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:16:42,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:42,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:16:42,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:16:42,150 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 16:16:42,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:42,272 INFO L93 Difference]: Finished difference Result 153 states and 172 transitions. [2021-11-22 16:16:42,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:16:42,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 16:16:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:42,274 INFO L225 Difference]: With dead ends: 153 [2021-11-22 16:16:42,274 INFO L226 Difference]: Without dead ends: 153 [2021-11-22 16:16:42,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 16:16:42,275 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 72 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:42,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 118 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-22 16:16:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 109. [2021-11-22 16:16:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 92 states have (on average 1.3804347826086956) internal successors, (127), 108 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 16:16:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-11-22 16:16:42,280 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 18 [2021-11-22 16:16:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:42,280 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-11-22 16:16:42,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 16:16:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-11-22 16:16:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 16:16:42,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:42,282 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:42,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 16:16:42,282 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:42,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:42,283 INFO L85 PathProgramCache]: Analyzing trace with hash -874266265, now seen corresponding path program 1 times [2021-11-22 16:16:42,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:42,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568994723] [2021-11-22 16:16:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:42,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:42,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:42,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568994723] [2021-11-22 16:16:42,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568994723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:42,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:42,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:16:42,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618646682] [2021-11-22 16:16:42,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:42,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:16:42,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:42,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:16:42,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:16:42,320 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 16:16:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:42,376 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2021-11-22 16:16:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:16:42,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 16:16:42,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:42,377 INFO L225 Difference]: With dead ends: 113 [2021-11-22 16:16:42,378 INFO L226 Difference]: Without dead ends: 113 [2021-11-22 16:16:42,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 16:16:42,379 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 89 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:42,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 108 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:16:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-22 16:16:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2021-11-22 16:16:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 105 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 16:16:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2021-11-22 16:16:42,383 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 19 [2021-11-22 16:16:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:42,384 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2021-11-22 16:16:42,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 16:16:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2021-11-22 16:16:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 16:16:42,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:42,391 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 16:16:42,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 16:16:42,391 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:42,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:42,392 INFO L85 PathProgramCache]: Analyzing trace with hash 55140128, now seen corresponding path program 1 times [2021-11-22 16:16:42,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:42,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817789286] [2021-11-22 16:16:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:42,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:42,496 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 16:16:42,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:42,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817789286] [2021-11-22 16:16:42,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817789286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:42,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:42,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:16:42,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260596868] [2021-11-22 16:16:42,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:42,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:16:42,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:16:42,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:16:42,499 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 16:16:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:42,654 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2021-11-22 16:16:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:16:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 16:16:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:42,656 INFO L225 Difference]: With dead ends: 170 [2021-11-22 16:16:42,656 INFO L226 Difference]: Without dead ends: 170 [2021-11-22 16:16:42,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:16:42,657 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:42,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 183 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:42,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-22 16:16:42,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 120. [2021-11-22 16:16:42,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 119 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:16:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2021-11-22 16:16:42,662 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 19 [2021-11-22 16:16:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:42,662 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2021-11-22 16:16:42,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 16:16:42,663 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2021-11-22 16:16:42,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 16:16:42,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:42,663 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 16:16:42,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 16:16:42,664 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash 55140129, now seen corresponding path program 1 times [2021-11-22 16:16:42,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:42,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006895422] [2021-11-22 16:16:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:42,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:42,871 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 16:16:42,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:42,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006895422] [2021-11-22 16:16:42,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006895422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:42,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:42,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 16:16:42,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255386457] [2021-11-22 16:16:42,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:42,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 16:16:42,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 16:16:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:16:42,874 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 16:16:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:43,427 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2021-11-22 16:16:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:16:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 16:16:43,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:43,429 INFO L225 Difference]: With dead ends: 184 [2021-11-22 16:16:43,429 INFO L226 Difference]: Without dead ends: 184 [2021-11-22 16:16:43,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:16:43,430 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 162 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:43,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 195 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:16:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-22 16:16:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2021-11-22 16:16:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 103 states have (on average 1.2912621359223302) internal successors, (133), 119 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 16:16:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 133 transitions. [2021-11-22 16:16:43,436 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 133 transitions. Word has length 19 [2021-11-22 16:16:43,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:43,436 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 133 transitions. [2021-11-22 16:16:43,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 16:16:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 133 transitions. [2021-11-22 16:16:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 16:16:43,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:43,437 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:43,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 16:16:43,437 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:43,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1332429407, now seen corresponding path program 1 times [2021-11-22 16:16:43,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:43,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079603496] [2021-11-22 16:16:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:43,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:16:43,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:43,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079603496] [2021-11-22 16:16:43,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079603496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:43,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:43,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:16:43,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070805799] [2021-11-22 16:16:43,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:43,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:16:43,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:43,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:16:43,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:16:43,477 INFO L87 Difference]: Start difference. First operand 120 states and 133 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 16:16:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:43,559 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2021-11-22 16:16:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:16:43,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 16:16:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:43,561 INFO L225 Difference]: With dead ends: 135 [2021-11-22 16:16:43,561 INFO L226 Difference]: Without dead ends: 135 [2021-11-22 16:16:43,561 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 16:16:43,562 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:43,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 98 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-22 16:16:43,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2021-11-22 16:16:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 107 states have (on average 1.2990654205607477) internal successors, (139), 122 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2021-11-22 16:16:43,567 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 20 [2021-11-22 16:16:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:43,568 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2021-11-22 16:16:43,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 16:16:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2021-11-22 16:16:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 16:16:43,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:43,569 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:43,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 16:16:43,570 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:43,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1332429406, now seen corresponding path program 1 times [2021-11-22 16:16:43,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:43,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406719515] [2021-11-22 16:16:43,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:43,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:43,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:43,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406719515] [2021-11-22 16:16:43,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406719515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:43,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:43,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:16:43,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010852889] [2021-11-22 16:16:43,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:43,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:16:43,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:43,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:16:43,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:16:43,631 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:43,819 INFO L93 Difference]: Finished difference Result 194 states and 217 transitions. [2021-11-22 16:16:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:16:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 16:16:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:43,821 INFO L225 Difference]: With dead ends: 194 [2021-11-22 16:16:43,821 INFO L226 Difference]: Without dead ends: 194 [2021-11-22 16:16:43,821 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 16:16:43,822 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:43,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 132 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-22 16:16:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 135. [2021-11-22 16:16:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.3277310924369747) internal successors, (158), 134 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 16:16:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 158 transitions. [2021-11-22 16:16:43,827 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 158 transitions. Word has length 20 [2021-11-22 16:16:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:43,827 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 158 transitions. [2021-11-22 16:16:43,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 158 transitions. [2021-11-22 16:16:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 16:16:43,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:43,829 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:43,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 16:16:43,829 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:43,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:43,829 INFO L85 PathProgramCache]: Analyzing trace with hash -316635569, now seen corresponding path program 1 times [2021-11-22 16:16:43,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:43,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346255004] [2021-11-22 16:16:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:43,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:43,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:43,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346255004] [2021-11-22 16:16:43,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346255004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:43,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:43,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 16:16:43,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448805049] [2021-11-22 16:16:43,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:43,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:16:43,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:43,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:16:43,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:16:43,942 INFO L87 Difference]: Start difference. First operand 135 states and 158 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:44,164 INFO L93 Difference]: Finished difference Result 195 states and 225 transitions. [2021-11-22 16:16:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:16:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-22 16:16:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:44,166 INFO L225 Difference]: With dead ends: 195 [2021-11-22 16:16:44,166 INFO L226 Difference]: Without dead ends: 195 [2021-11-22 16:16:44,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:16:44,167 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 93 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:44,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 236 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-22 16:16:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2021-11-22 16:16:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 127 states have (on average 1.31496062992126) internal successors, (167), 142 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 16:16:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 167 transitions. [2021-11-22 16:16:44,172 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 167 transitions. Word has length 23 [2021-11-22 16:16:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:44,172 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 167 transitions. [2021-11-22 16:16:44,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 167 transitions. [2021-11-22 16:16:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-22 16:16:44,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:44,173 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:44,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 16:16:44,174 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:44,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1225769432, now seen corresponding path program 1 times [2021-11-22 16:16:44,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:44,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074246924] [2021-11-22 16:16:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:44,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:44,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:44,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074246924] [2021-11-22 16:16:44,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074246924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:44,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:44,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:16:44,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200175908] [2021-11-22 16:16:44,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:44,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:16:44,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:44,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:16:44,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:16:44,231 INFO L87 Difference]: Start difference. First operand 143 states and 167 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:44,351 INFO L93 Difference]: Finished difference Result 167 states and 191 transitions. [2021-11-22 16:16:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:16:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-22 16:16:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:44,353 INFO L225 Difference]: With dead ends: 167 [2021-11-22 16:16:44,353 INFO L226 Difference]: Without dead ends: 167 [2021-11-22 16:16:44,353 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 16:16:44,354 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 112 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:44,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 148 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-22 16:16:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 157. [2021-11-22 16:16:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 141 states have (on average 1.3546099290780143) internal successors, (191), 156 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2021-11-22 16:16:44,359 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 24 [2021-11-22 16:16:44,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:44,360 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2021-11-22 16:16:44,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2021-11-22 16:16:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 16:16:44,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:44,361 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 16:16:44,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 16:16:44,361 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:44,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1085033438, now seen corresponding path program 1 times [2021-11-22 16:16:44,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:44,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674453838] [2021-11-22 16:16:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:44,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:44,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:44,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674453838] [2021-11-22 16:16:44,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674453838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:44,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324278540] [2021-11-22 16:16:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:44,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:44,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:44,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:44,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:16:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-22 16:16:44,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:44,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-22 16:16:44,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-22 16:16:44,792 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-22 16:16:44,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2021-11-22 16:16:44,811 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-22 16:16:44,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2021-11-22 16:16:44,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:16:44,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-22 16:16:44,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-22 16:16:44,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:44,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:16:44,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-22 16:16:45,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-22 16:16:45,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:16:45,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 47 [2021-11-22 16:16:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:45,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-22 16:16:45,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:16:45,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 51 [2021-11-22 16:16:45,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:16:45,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 19 [2021-11-22 16:16:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:45,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:45,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324278540] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:45,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:45,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 6] total 13 [2021-11-22 16:16:45,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471366292] [2021-11-22 16:16:45,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:45,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 16:16:45,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 16:16:45,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:16:45,821 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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 16:16:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:46,574 INFO L93 Difference]: Finished difference Result 186 states and 218 transitions. [2021-11-22 16:16:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 16:16:46,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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 27 [2021-11-22 16:16:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:46,576 INFO L225 Difference]: With dead ends: 186 [2021-11-22 16:16:46,576 INFO L226 Difference]: Without dead ends: 186 [2021-11-22 16:16:46,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-11-22 16:16:46,577 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 151 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:46,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 434 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:16:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-22 16:16:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-11-22 16:16:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 145 states have (on average 1.3448275862068966) internal successors, (195), 160 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 16:16:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2021-11-22 16:16:46,583 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 27 [2021-11-22 16:16:46,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:46,583 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2021-11-22 16:16:46,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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 16:16:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2021-11-22 16:16:46,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 16:16:46,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:46,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-22 16:16:46,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:46,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 16:16:46,798 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:46,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2078846143, now seen corresponding path program 1 times [2021-11-22 16:16:46,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:46,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993602926] [2021-11-22 16:16:46,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:46,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:46,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:46,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993602926] [2021-11-22 16:16:46,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993602926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:46,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093802101] [2021-11-22 16:16:46,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:46,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:46,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:46,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:46,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:16:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:46,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:16:46,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:46,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:16:47,011 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-22 16:16:47,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-22 16:16:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:47,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:47,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093802101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:47,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:47,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 16:16:47,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555454307] [2021-11-22 16:16:47,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:47,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:16:47,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:16:47,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:16:47,365 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 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 16:16:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:47,460 INFO L93 Difference]: Finished difference Result 226 states and 268 transitions. [2021-11-22 16:16:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:16:47,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 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 27 [2021-11-22 16:16:47,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:47,462 INFO L225 Difference]: With dead ends: 226 [2021-11-22 16:16:47,463 INFO L226 Difference]: Without dead ends: 226 [2021-11-22 16:16:47,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:16:47,464 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 117 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:47,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 167 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2021-11-22 16:16:47,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-22 16:16:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 185. [2021-11-22 16:16:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 169 states have (on average 1.3254437869822486) internal successors, (224), 184 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 16:16:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2021-11-22 16:16:47,470 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 27 [2021-11-22 16:16:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:47,471 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2021-11-22 16:16:47,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 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 16:16:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2021-11-22 16:16:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 16:16:47,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:47,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-22 16:16:47,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:47,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:47,685 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:47,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2078846144, now seen corresponding path program 1 times [2021-11-22 16:16:47,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:47,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961418567] [2021-11-22 16:16:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:47,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:47,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:47,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961418567] [2021-11-22 16:16:47,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961418567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:47,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536814668] [2021-11-22 16:16:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:47,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:47,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:47,748 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:47,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:16:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:47,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 16:16:47,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:47,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:16:47,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:16:47,999 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:16:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 24 [2021-11-22 16:16:48,008 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:16:48,009 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 21 treesize of output 21 [2021-11-22 16:16:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:48,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:48,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536814668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:48,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:48,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2021-11-22 16:16:48,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63641088] [2021-11-22 16:16:48,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:48,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:16:48,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:16:48,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:16:48,628 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 16:16:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:48,733 INFO L93 Difference]: Finished difference Result 189 states and 227 transitions. [2021-11-22 16:16:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:16:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 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 16:16:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:48,735 INFO L225 Difference]: With dead ends: 189 [2021-11-22 16:16:48,735 INFO L226 Difference]: Without dead ends: 189 [2021-11-22 16:16:48,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:16:48,736 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 65 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:48,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 170 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2021-11-22 16:16:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-22 16:16:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2021-11-22 16:16:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 169 states have (on average 1.319526627218935) internal successors, (223), 184 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 16:16:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 223 transitions. [2021-11-22 16:16:48,742 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 223 transitions. Word has length 27 [2021-11-22 16:16:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:48,742 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 223 transitions. [2021-11-22 16:16:48,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 16:16:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 223 transitions. [2021-11-22 16:16:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 16:16:48,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:48,743 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:48,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:48,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:48,963 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash 723701189, now seen corresponding path program 1 times [2021-11-22 16:16:48,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:48,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907771640] [2021-11-22 16:16:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:48,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:49,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:49,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907771640] [2021-11-22 16:16:49,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907771640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:49,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559089008] [2021-11-22 16:16:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:49,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:49,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:49,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:49,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 16:16:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:49,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:16:49,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:49,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:49,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559089008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:49,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:49,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2021-11-22 16:16:49,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687280501] [2021-11-22 16:16:49,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:49,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:16:49,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:49,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:16:49,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:16:49,439 INFO L87 Difference]: Start difference. First operand 185 states and 223 transitions. Second operand has 11 states, 10 states have (on average 5.6) internal successors, (56), 11 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 16:16:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:49,650 INFO L93 Difference]: Finished difference Result 187 states and 224 transitions. [2021-11-22 16:16:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:16:49,650 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 11 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) Word has length 28 [2021-11-22 16:16:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:49,651 INFO L225 Difference]: With dead ends: 187 [2021-11-22 16:16:49,651 INFO L226 Difference]: Without dead ends: 175 [2021-11-22 16:16:49,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:16:49,652 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 21 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:49,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 235 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2021-11-22 16:16:49,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-22 16:16:49,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-22 16:16:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 159 states have (on average 1.3333333333333333) internal successors, (212), 174 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 16:16:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2021-11-22 16:16:49,657 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 28 [2021-11-22 16:16:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:49,657 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2021-11-22 16:16:49,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 11 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 16:16:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2021-11-22 16:16:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 16:16:49,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:49,658 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 16:16:49,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:49,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:49,870 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:49,870 INFO L85 PathProgramCache]: Analyzing trace with hash -28804244, now seen corresponding path program 1 times [2021-11-22 16:16:49,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:49,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848837701] [2021-11-22 16:16:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:49,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:50,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848837701] [2021-11-22 16:16:50,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848837701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116925166] [2021-11-22 16:16:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:50,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:50,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:50,088 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:50,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 16:16:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:50,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 16:16:50,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:50,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:16:50,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:16:50,218 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 11 treesize of output 7 [2021-11-22 16:16:50,246 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-22 16:16:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:50,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:50,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 20 [2021-11-22 16:16:50,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:50,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:50,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:50,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-22 16:16:50,397 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:16:50,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2021-11-22 16:16:50,419 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:16:50,419 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 11 treesize of output 11 [2021-11-22 16:16:50,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:50,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:50,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-22 16:16:50,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:50,615 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-22 16:16:50,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 15 [2021-11-22 16:16:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:50,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:51,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116925166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:51,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:51,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 4] total 19 [2021-11-22 16:16:51,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32857387] [2021-11-22 16:16:51,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:51,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 16:16:51,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:51,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 16:16:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-11-22 16:16:51,133 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:51,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:51,566 INFO L93 Difference]: Finished difference Result 202 states and 242 transitions. [2021-11-22 16:16:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 16:16:51,569 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-22 16:16:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:51,570 INFO L225 Difference]: With dead ends: 202 [2021-11-22 16:16:51,570 INFO L226 Difference]: Without dead ends: 202 [2021-11-22 16:16:51,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-11-22 16:16:51,571 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 73 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:51,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 334 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 250 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2021-11-22 16:16:51,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-22 16:16:51,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 187. [2021-11-22 16:16:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 171 states have (on average 1.3216374269005848) internal successors, (226), 186 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 226 transitions. [2021-11-22 16:16:51,577 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 226 transitions. Word has length 31 [2021-11-22 16:16:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:51,578 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 226 transitions. [2021-11-22 16:16:51,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:51,578 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 226 transitions. [2021-11-22 16:16:51,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 16:16:51,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:51,579 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 16:16:51,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-22 16:16:51,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-22 16:16:51,779 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:51,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash 36474197, now seen corresponding path program 1 times [2021-11-22 16:16:51,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:51,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846750455] [2021-11-22 16:16:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:51,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:51,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:51,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846750455] [2021-11-22 16:16:51,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846750455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:51,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687819218] [2021-11-22 16:16:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:51,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:51,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:51,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:51,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 16:16:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:51,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 16:16:51,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:51,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:16:52,011 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 17 treesize of output 13 [2021-11-22 16:16:52,033 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-22 16:16:52,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-22 16:16:52,103 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-22 16:16:52,103 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 24 [2021-11-22 16:16:52,160 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 30 treesize of output 18 [2021-11-22 16:16:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:52,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:52,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687819218] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:52,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:52,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-22 16:16:52,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431088944] [2021-11-22 16:16:52,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:52,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 16:16:52,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:52,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 16:16:52,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:16:52,387 INFO L87 Difference]: Start difference. First operand 187 states and 226 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 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 16:16:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:52,669 INFO L93 Difference]: Finished difference Result 243 states and 284 transitions. [2021-11-22 16:16:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 16:16:52,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 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) Word has length 32 [2021-11-22 16:16:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:52,671 INFO L225 Difference]: With dead ends: 243 [2021-11-22 16:16:52,672 INFO L226 Difference]: Without dead ends: 243 [2021-11-22 16:16:52,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-11-22 16:16:52,673 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 125 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:52,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 271 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 219 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2021-11-22 16:16:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-22 16:16:52,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 186. [2021-11-22 16:16:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 171 states have (on average 1.3099415204678362) internal successors, (224), 185 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 16:16:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 224 transitions. [2021-11-22 16:16:52,680 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 224 transitions. Word has length 32 [2021-11-22 16:16:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:52,680 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 224 transitions. [2021-11-22 16:16:52,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 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 16:16:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 224 transitions. [2021-11-22 16:16:52,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 16:16:52,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:52,682 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 16:16:52,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:52,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-22 16:16:52,906 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:52,906 INFO L85 PathProgramCache]: Analyzing trace with hash 36474198, now seen corresponding path program 1 times [2021-11-22 16:16:52,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:52,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313384437] [2021-11-22 16:16:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:52,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:53,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:53,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313384437] [2021-11-22 16:16:53,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313384437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:53,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803445655] [2021-11-22 16:16:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:53,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:53,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:53,041 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:53,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 16:16:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:53,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-22 16:16:53,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:53,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:16:53,199 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 38 treesize of output 34 [2021-11-22 16:16:53,202 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 35 treesize of output 31 [2021-11-22 16:16:53,258 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-22 16:16:53,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 32 [2021-11-22 16:16:53,288 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-22 16:16:53,288 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 15 treesize of output 15 [2021-11-22 16:16:53,410 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-22 16:16:53,411 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 61 treesize of output 52 [2021-11-22 16:16:53,425 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-22 16:16:53,426 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 57 treesize of output 48 [2021-11-22 16:16:53,505 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 50 treesize of output 38 [2021-11-22 16:16:53,509 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 35 treesize of output 23 [2021-11-22 16:16:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:53,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:53,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-22 16:16:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:54,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803445655] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:54,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:54,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2021-11-22 16:16:54,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953391993] [2021-11-22 16:16:54,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:54,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-22 16:16:54,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:54,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-22 16:16:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-11-22 16:16:54,206 INFO L87 Difference]: Start difference. First operand 186 states and 224 transitions. Second operand has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 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 16:16:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:54,738 INFO L93 Difference]: Finished difference Result 256 states and 305 transitions. [2021-11-22 16:16:54,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 16:16:54,739 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 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) Word has length 32 [2021-11-22 16:16:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:54,740 INFO L225 Difference]: With dead ends: 256 [2021-11-22 16:16:54,741 INFO L226 Difference]: Without dead ends: 256 [2021-11-22 16:16:54,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-11-22 16:16:54,742 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 178 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:54,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 380 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 315 Invalid, 0 Unknown, 138 Unchecked, 0.3s Time] [2021-11-22 16:16:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-22 16:16:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 177. [2021-11-22 16:16:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 163 states have (on average 1.3067484662576687) internal successors, (213), 176 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 16:16:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2021-11-22 16:16:54,750 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 32 [2021-11-22 16:16:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:54,750 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2021-11-22 16:16:54,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 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 16:16:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2021-11-22 16:16:54,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 16:16:54,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:54,751 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, 1, 1] [2021-11-22 16:16:54,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:54,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:54,966 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:54,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1911073267, now seen corresponding path program 1 times [2021-11-22 16:16:54,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:54,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177362056] [2021-11-22 16:16:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:54,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:55,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:55,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177362056] [2021-11-22 16:16:55,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177362056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:55,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882785072] [2021-11-22 16:16:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:55,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:55,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:55,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:55,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 16:16:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:55,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:16:55,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:16:55,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:16:55,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882785072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:55,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:16:55,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-11-22 16:16:55,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021492594] [2021-11-22 16:16:55,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:55,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:16:55,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:16:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:16:55,325 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:55,484 INFO L93 Difference]: Finished difference Result 191 states and 219 transitions. [2021-11-22 16:16:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:16:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 16:16:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:55,486 INFO L225 Difference]: With dead ends: 191 [2021-11-22 16:16:55,486 INFO L226 Difference]: Without dead ends: 191 [2021-11-22 16:16:55,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-22 16:16:55,487 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 122 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:55,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 100 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-22 16:16:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 177. [2021-11-22 16:16:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 163 states have (on average 1.3006134969325154) internal successors, (212), 176 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 16:16:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 212 transitions. [2021-11-22 16:16:55,493 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 212 transitions. Word has length 33 [2021-11-22 16:16:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:55,494 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 212 transitions. [2021-11-22 16:16:55,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 212 transitions. [2021-11-22 16:16:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 16:16:55,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:55,495 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, 1, 1, 1, 1, 1] [2021-11-22 16:16:55,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:55,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:55,718 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1302827474, now seen corresponding path program 1 times [2021-11-22 16:16:55,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:55,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990120080] [2021-11-22 16:16:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:55,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:16:55,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:55,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990120080] [2021-11-22 16:16:55,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990120080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:55,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:55,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:16:55,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011468425] [2021-11-22 16:16:55,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:55,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:16:55,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:55,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:16:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:16:55,771 INFO L87 Difference]: Start difference. First operand 177 states and 212 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:55,831 INFO L93 Difference]: Finished difference Result 183 states and 210 transitions. [2021-11-22 16:16:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:16:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 16:16:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:55,833 INFO L225 Difference]: With dead ends: 183 [2021-11-22 16:16:55,833 INFO L226 Difference]: Without dead ends: 183 [2021-11-22 16:16:55,833 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 16:16:55,834 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 108 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:55,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 101 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:16:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-22 16:16:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 163. [2021-11-22 16:16:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 149 states have (on average 1.2684563758389262) internal successors, (189), 162 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 16:16:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2021-11-22 16:16:55,840 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 36 [2021-11-22 16:16:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:55,840 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2021-11-22 16:16:55,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2021-11-22 16:16:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 16:16:55,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:55,842 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, 1, 1, 1, 1, 1] [2021-11-22 16:16:55,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-22 16:16:55,842 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:55,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1302827524, now seen corresponding path program 1 times [2021-11-22 16:16:55,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:55,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692713104] [2021-11-22 16:16:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:55,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:55,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:55,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692713104] [2021-11-22 16:16:55,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692713104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:55,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:55,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 16:16:55,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338686153] [2021-11-22 16:16:55,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:55,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:16:55,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:16:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:16:55,912 INFO L87 Difference]: Start difference. First operand 163 states and 189 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 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 16:16:56,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:56,149 INFO L93 Difference]: Finished difference Result 196 states and 222 transitions. [2021-11-22 16:16:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 16:16:56,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 16:16:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:56,151 INFO L225 Difference]: With dead ends: 196 [2021-11-22 16:16:56,152 INFO L226 Difference]: Without dead ends: 196 [2021-11-22 16:16:56,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:16:56,153 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 74 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:56,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 173 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:16:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-22 16:16:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 172. [2021-11-22 16:16:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 158 states have (on average 1.2721518987341771) internal successors, (201), 171 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 201 transitions. [2021-11-22 16:16:56,159 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 201 transitions. Word has length 36 [2021-11-22 16:16:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:56,160 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 201 transitions. [2021-11-22 16:16:56,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 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 16:16:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 201 transitions. [2021-11-22 16:16:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 16:16:56,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:56,161 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, 1, 1, 1, 1, 1] [2021-11-22 16:16:56,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-22 16:16:56,161 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1302827525, now seen corresponding path program 1 times [2021-11-22 16:16:56,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:56,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999456771] [2021-11-22 16:16:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:56,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:56,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:56,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999456771] [2021-11-22 16:16:56,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999456771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:56,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:56,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 16:16:56,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340209416] [2021-11-22 16:16:56,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:56,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:16:56,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:16:56,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:16:56,264 INFO L87 Difference]: Start difference. First operand 172 states and 201 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 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 16:16:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:56,585 INFO L93 Difference]: Finished difference Result 248 states and 281 transitions. [2021-11-22 16:16:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:16:56,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 16:16:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:56,588 INFO L225 Difference]: With dead ends: 248 [2021-11-22 16:16:56,588 INFO L226 Difference]: Without dead ends: 248 [2021-11-22 16:16:56,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:16:56,590 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 130 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:56,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 256 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:16:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-22 16:16:56,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 172. [2021-11-22 16:16:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 158 states have (on average 1.2658227848101267) internal successors, (200), 171 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 16:16:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 200 transitions. [2021-11-22 16:16:56,599 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 200 transitions. Word has length 36 [2021-11-22 16:16:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:56,599 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 200 transitions. [2021-11-22 16:16:56,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 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 16:16:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 200 transitions. [2021-11-22 16:16:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-22 16:16:56,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:56,600 INFO L514 BasicCegarLoop]: trace histogram [3, 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 16:16:56,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-22 16:16:56,601 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-22 16:16:56,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:56,601 INFO L85 PathProgramCache]: Analyzing trace with hash 904979977, now seen corresponding path program 1 times [2021-11-22 16:16:56,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:56,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374674871] [2021-11-22 16:16:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:56,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:57,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:57,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374674871] [2021-11-22 16:16:57,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374674871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:57,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326131028] [2021-11-22 16:16:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:57,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:57,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:57,058 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:57,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae3510a8-964a-4297-b0e9-13b5e825d0e3/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 16:16:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:57,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-22 16:16:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:57,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:16:57,183 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 11 treesize of output 7 [2021-11-22 16:16:57,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:57,211 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 16:16:57,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:57,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:57,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:57,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-22 16:16:57,393 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-22 16:16:57,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-22 16:16:57,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-22 16:16:57,600 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-22 16:16:57,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 42 [2021-11-22 16:16:57,692 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-22 16:16:57,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 52 [2021-11-22 16:16:57,816 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-22 16:16:57,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 64 [2021-11-22 16:16:57,958 INFO L354 Elim1Store]: treesize reduction 188, result has 15.7 percent of original size [2021-11-22 16:16:57,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 67 [2021-11-22 16:16:58,211 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-22 16:16:58,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 74 [2021-11-22 16:16:58,396 INFO L354 Elim1Store]: treesize reduction 384, result has 10.9 percent of original size [2021-11-22 16:16:58,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 111 treesize of output 86 [2021-11-22 16:16:58,808 INFO L354 Elim1Store]: treesize reduction 228, result has 0.4 percent of original size [2021-11-22 16:16:58,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 39 [2021-11-22 16:16:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:58,911 INFO L328 TraceCheckSpWp]: Computing backward predicates...