./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:46:04,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:46:04,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:46:04,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:46:04,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:46:04,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:46:04,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:46:04,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:46:04,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:46:04,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:46:04,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:46:04,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:46:04,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:46:04,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:46:04,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:46:04,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:46:04,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:46:04,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:46:04,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:46:04,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:46:04,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:46:04,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:46:04,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:46:04,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:46:04,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:46:04,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:46:04,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:46:04,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:46:04,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:46:04,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:46:04,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:46:04,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:46:04,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:46:04,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:46:04,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:46:04,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:46:04,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:46:04,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:46:04,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:46:04,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:46:04,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:46:04,530 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 21:46:04,556 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:46:04,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:46:04,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:46:04,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:46:04,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:46:04,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:46:04,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:46:04,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:46:04,558 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:46:04,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:46:04,559 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:46:04,559 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 21:46:04,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:46:04,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:46:04,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:46:04,560 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 21:46:04,560 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 21:46:04,560 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 21:46:04,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:46:04,560 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 21:46:04,561 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:46:04,561 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:46:04,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:46:04,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:46:04,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:46:04,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:46:04,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:46:04,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:46:04,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:46:04,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:46:04,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:46:04,563 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_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2021-12-06 21:46:04,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:46:04,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:46:04,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:46:04,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:46:04,752 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:46:04,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2021-12-06 21:46:04,795 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/data/ba46c3842/040f8efd149b429b95abaf6eb7047eba/FLAGf081749fa [2021-12-06 21:46:05,213 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:46:05,213 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2021-12-06 21:46:05,224 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/data/ba46c3842/040f8efd149b429b95abaf6eb7047eba/FLAGf081749fa [2021-12-06 21:46:05,233 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/data/ba46c3842/040f8efd149b429b95abaf6eb7047eba [2021-12-06 21:46:05,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:46:05,236 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:46:05,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:46:05,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:46:05,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:46:05,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad87b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05, skipping insertion in model container [2021-12-06 21:46:05,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:46:05,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:46:05,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:46:05,510 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:46:05,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:46:05,573 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:46:05,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05 WrapperNode [2021-12-06 21:46:05,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:46:05,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:46:05,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:46:05,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:46:05,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,622 INFO L137 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 223 [2021-12-06 21:46:05,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:46:05,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:46:05,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:46:05,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:46:05,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:46:05,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:46:05,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:46:05,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:46:05,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05" (1/1) ... [2021-12-06 21:46:05,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:46:05,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:05,683 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:46:05,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:46:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-12-06 21:46:05,712 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-12-06 21:46:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 21:46:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 21:46:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:46:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 21:46:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 21:46:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 21:46:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 21:46:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:46:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:46:05,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:46:05,793 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:46:05,794 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:46:06,095 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:46:06,101 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:46:06,102 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 21:46:06,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:46:06 BoogieIcfgContainer [2021-12-06 21:46:06,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:46:06,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:46:06,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:46:06,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:46:06,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:46:05" (1/3) ... [2021-12-06 21:46:06,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76875b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:46:06, skipping insertion in model container [2021-12-06 21:46:06,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:46:05" (2/3) ... [2021-12-06 21:46:06,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76875b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:46:06, skipping insertion in model container [2021-12-06 21:46:06,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:46:06" (3/3) ... [2021-12-06 21:46:06,110 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2021-12-06 21:46:06,113 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:46:06,114 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2021-12-06 21:46:06,145 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:46:06,150 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 21:46:06,150 INFO L340 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2021-12-06 21:46:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 147 states have internal predecessors, (173), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 21:46:06,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:06,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 21:46:06,169 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:06,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1044596682, now seen corresponding path program 1 times [2021-12-06 21:46:06,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:06,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894189375] [2021-12-06 21:46:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:06,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:06,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:06,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894189375] [2021-12-06 21:46:06,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894189375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:06,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:06,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:46:06,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698106385] [2021-12-06 21:46:06,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:06,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:46:06,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:06,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:46:06,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:46:06,310 INFO L87 Difference]: Start difference. First operand has 151 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 147 states have internal predecessors, (173), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-12-06 21:46:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:06,329 INFO L93 Difference]: Finished difference Result 151 states and 172 transitions. [2021-12-06 21:46:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:46:06,331 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2021-12-06 21:46:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:06,337 INFO L225 Difference]: With dead ends: 151 [2021-12-06 21:46:06,337 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 21:46:06,338 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 [2021-12-06 21:46:06,341 INFO L933 BasicCegarLoop]: 172 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, 172 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 [2021-12-06 21:46:06,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 21:46:06,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-12-06 21:46:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 88 states have (on average 1.8636363636363635) internal successors, (164), 144 states have internal predecessors, (164), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 168 transitions. [2021-12-06 21:46:06,375 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 168 transitions. Word has length 6 [2021-12-06 21:46:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:06,376 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 168 transitions. [2021-12-06 21:46:06,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-12-06 21:46:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 168 transitions. [2021-12-06 21:46:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 21:46:06,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:06,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:06,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:46:06,377 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:06,377 INFO L85 PathProgramCache]: Analyzing trace with hash 594339757, now seen corresponding path program 1 times [2021-12-06 21:46:06,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:06,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728092058] [2021-12-06 21:46:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:06,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:06,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:06,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728092058] [2021-12-06 21:46:06,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728092058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:06,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:06,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:46:06,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808586405] [2021-12-06 21:46:06,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:06,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:06,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:06,418 INFO L87 Difference]: Start difference. First operand 148 states and 168 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:06,461 INFO L93 Difference]: Finished difference Result 294 states and 333 transitions. [2021-12-06 21:46:06,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:06,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 21:46:06,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:06,464 INFO L225 Difference]: With dead ends: 294 [2021-12-06 21:46:06,464 INFO L226 Difference]: Without dead ends: 294 [2021-12-06 21:46:06,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:06,465 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 163 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:06,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 485 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:06,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-06 21:46:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 150. [2021-12-06 21:46:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 90 states have (on average 1.8444444444444446) internal successors, (166), 146 states have internal predecessors, (166), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-12-06 21:46:06,478 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 8 [2021-12-06 21:46:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:06,478 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-12-06 21:46:06,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-12-06 21:46:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 21:46:06,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:06,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:06,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:46:06,479 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:06,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:06,479 INFO L85 PathProgramCache]: Analyzing trace with hash 592492715, now seen corresponding path program 1 times [2021-12-06 21:46:06,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:06,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525816970] [2021-12-06 21:46:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:06,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:06,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:06,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525816970] [2021-12-06 21:46:06,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525816970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:06,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:06,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-06 21:46:06,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087321021] [2021-12-06 21:46:06,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:06,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:46:06,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:46:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:46:06,544 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:06,692 INFO L93 Difference]: Finished difference Result 289 states and 328 transitions. [2021-12-06 21:46:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:46:06,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 21:46:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:06,695 INFO L225 Difference]: With dead ends: 289 [2021-12-06 21:46:06,695 INFO L226 Difference]: Without dead ends: 289 [2021-12-06 21:46:06,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:46:06,697 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 148 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:06,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 223 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-06 21:46:06,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 203. [2021-12-06 21:46:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 140 states have (on average 1.8285714285714285) internal successors, (256), 196 states have internal predecessors, (256), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 21:46:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 264 transitions. [2021-12-06 21:46:06,712 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 264 transitions. Word has length 8 [2021-12-06 21:46:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:06,712 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 264 transitions. [2021-12-06 21:46:06,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 264 transitions. [2021-12-06 21:46:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 21:46:06,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:06,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:06,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:46:06,713 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:06,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash 592492716, now seen corresponding path program 1 times [2021-12-06 21:46:06,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:06,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556467008] [2021-12-06 21:46:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:06,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:06,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556467008] [2021-12-06 21:46:06,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556467008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:06,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:06,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:46:06,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695878939] [2021-12-06 21:46:06,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:06,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:06,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:06,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:06,794 INFO L87 Difference]: Start difference. First operand 203 states and 264 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:06,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:06,914 INFO L93 Difference]: Finished difference Result 360 states and 454 transitions. [2021-12-06 21:46:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:06,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 21:46:06,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:06,917 INFO L225 Difference]: With dead ends: 360 [2021-12-06 21:46:06,917 INFO L226 Difference]: Without dead ends: 360 [2021-12-06 21:46:06,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:06,918 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 151 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:06,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 371 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-06 21:46:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 288. [2021-12-06 21:46:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 219 states have (on average 1.7945205479452055) internal successors, (393), 277 states have internal predecessors, (393), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 409 transitions. [2021-12-06 21:46:06,933 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 409 transitions. Word has length 8 [2021-12-06 21:46:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:06,933 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 409 transitions. [2021-12-06 21:46:06,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 409 transitions. [2021-12-06 21:46:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 21:46:06,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:06,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:06,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:46:06,934 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash 592492778, now seen corresponding path program 1 times [2021-12-06 21:46:06,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:06,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230209700] [2021-12-06 21:46:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:06,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:07,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:07,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230209700] [2021-12-06 21:46:07,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230209700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:07,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:07,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:46:07,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131404904] [2021-12-06 21:46:07,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:07,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:07,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:07,004 INFO L87 Difference]: Start difference. First operand 288 states and 409 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:07,117 INFO L93 Difference]: Finished difference Result 359 states and 452 transitions. [2021-12-06 21:46:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 21:46:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:07,119 INFO L225 Difference]: With dead ends: 359 [2021-12-06 21:46:07,119 INFO L226 Difference]: Without dead ends: 359 [2021-12-06 21:46:07,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:07,121 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 133 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:07,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 385 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:07,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-12-06 21:46:07,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 288. [2021-12-06 21:46:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 219 states have (on average 1.7945205479452055) internal successors, (393), 277 states have internal predecessors, (393), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 409 transitions. [2021-12-06 21:46:07,133 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 409 transitions. Word has length 8 [2021-12-06 21:46:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:07,133 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 409 transitions. [2021-12-06 21:46:07,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 409 transitions. [2021-12-06 21:46:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 21:46:07,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:07,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:07,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:46:07,134 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1364890281, now seen corresponding path program 1 times [2021-12-06 21:46:07,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:07,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525909603] [2021-12-06 21:46:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:07,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:07,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:07,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525909603] [2021-12-06 21:46:07,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525909603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:07,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:07,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:46:07,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262647445] [2021-12-06 21:46:07,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:07,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:46:07,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:46:07,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:46:07,164 INFO L87 Difference]: Start difference. First operand 288 states and 409 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:07,175 INFO L93 Difference]: Finished difference Result 391 states and 509 transitions. [2021-12-06 21:46:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:46:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 21:46:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:07,177 INFO L225 Difference]: With dead ends: 391 [2021-12-06 21:46:07,177 INFO L226 Difference]: Without dead ends: 391 [2021-12-06 21:46:07,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:46:07,178 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 139 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:07,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 328 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-12-06 21:46:07,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 290. [2021-12-06 21:46:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 221 states have (on average 1.7782805429864252) internal successors, (393), 279 states have internal predecessors, (393), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 409 transitions. [2021-12-06 21:46:07,192 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 409 transitions. Word has length 11 [2021-12-06 21:46:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:07,192 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 409 transitions. [2021-12-06 21:46:07,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 409 transitions. [2021-12-06 21:46:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 21:46:07,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:07,193 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:07,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 21:46:07,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:07,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:07,194 INFO L85 PathProgramCache]: Analyzing trace with hash 638072979, now seen corresponding path program 1 times [2021-12-06 21:46:07,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:07,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970844364] [2021-12-06 21:46:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:07,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:07,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:07,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970844364] [2021-12-06 21:46:07,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970844364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:07,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:07,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:46:07,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657312664] [2021-12-06 21:46:07,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:07,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:46:07,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:07,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:46:07,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:46:07,217 INFO L87 Difference]: Start difference. First operand 290 states and 409 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:07,273 INFO L93 Difference]: Finished difference Result 349 states and 466 transitions. [2021-12-06 21:46:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:46:07,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 21:46:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:07,276 INFO L225 Difference]: With dead ends: 349 [2021-12-06 21:46:07,276 INFO L226 Difference]: Without dead ends: 342 [2021-12-06 21:46:07,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:46:07,277 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 81 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:07,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 251 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-06 21:46:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 287. [2021-12-06 21:46:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 218 states have (on average 1.7798165137614679) internal successors, (388), 276 states have internal predecessors, (388), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 404 transitions. [2021-12-06 21:46:07,285 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 404 transitions. Word has length 12 [2021-12-06 21:46:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:07,285 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 404 transitions. [2021-12-06 21:46:07,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:07,286 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 404 transitions. [2021-12-06 21:46:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 21:46:07,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:07,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:07,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 21:46:07,286 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash -529439982, now seen corresponding path program 1 times [2021-12-06 21:46:07,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:07,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86039305] [2021-12-06 21:46:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:07,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:07,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:07,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86039305] [2021-12-06 21:46:07,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86039305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:07,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:07,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:46:07,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838091441] [2021-12-06 21:46:07,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:07,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:07,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:07,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:07,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:07,315 INFO L87 Difference]: Start difference. First operand 287 states and 404 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:07,335 INFO L93 Difference]: Finished difference Result 451 states and 620 transitions. [2021-12-06 21:46:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:07,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 21:46:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:07,339 INFO L225 Difference]: With dead ends: 451 [2021-12-06 21:46:07,339 INFO L226 Difference]: Without dead ends: 451 [2021-12-06 21:46:07,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:07,340 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 153 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:07,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 470 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-06 21:46:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 291. [2021-12-06 21:46:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 222 states have (on average 1.7567567567567568) internal successors, (390), 280 states have internal predecessors, (390), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 406 transitions. [2021-12-06 21:46:07,352 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 406 transitions. Word has length 14 [2021-12-06 21:46:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:07,352 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 406 transitions. [2021-12-06 21:46:07,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 406 transitions. [2021-12-06 21:46:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 21:46:07,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:07,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:07,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 21:46:07,354 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:07,354 INFO L85 PathProgramCache]: Analyzing trace with hash 279906644, now seen corresponding path program 1 times [2021-12-06 21:46:07,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:07,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319070467] [2021-12-06 21:46:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:07,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:07,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:07,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319070467] [2021-12-06 21:46:07,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319070467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:07,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:07,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:46:07,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696515525] [2021-12-06 21:46:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:07,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:07,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:07,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:07,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:07,400 INFO L87 Difference]: Start difference. First operand 291 states and 406 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:07,563 INFO L93 Difference]: Finished difference Result 422 states and 514 transitions. [2021-12-06 21:46:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:07,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 21:46:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:07,565 INFO L225 Difference]: With dead ends: 422 [2021-12-06 21:46:07,565 INFO L226 Difference]: Without dead ends: 422 [2021-12-06 21:46:07,566 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 [2021-12-06 21:46:07,566 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 281 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:07,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 381 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-06 21:46:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 291. [2021-12-06 21:46:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 222 states have (on average 1.7297297297297298) internal successors, (384), 280 states have internal predecessors, (384), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 400 transitions. [2021-12-06 21:46:07,575 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 400 transitions. Word has length 14 [2021-12-06 21:46:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:07,575 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 400 transitions. [2021-12-06 21:46:07,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 400 transitions. [2021-12-06 21:46:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 21:46:07,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:07,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:07,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 21:46:07,576 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:07,576 INFO L85 PathProgramCache]: Analyzing trace with hash 279906645, now seen corresponding path program 1 times [2021-12-06 21:46:07,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:07,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565087746] [2021-12-06 21:46:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:07,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:07,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:07,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565087746] [2021-12-06 21:46:07,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565087746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:07,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:07,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:46:07,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548934306] [2021-12-06 21:46:07,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:07,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:46:07,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:07,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:46:07,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:46:07,664 INFO L87 Difference]: Start difference. First operand 291 states and 400 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:07,823 INFO L93 Difference]: Finished difference Result 331 states and 409 transitions. [2021-12-06 21:46:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:46:07,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 21:46:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:07,825 INFO L225 Difference]: With dead ends: 331 [2021-12-06 21:46:07,825 INFO L226 Difference]: Without dead ends: 331 [2021-12-06 21:46:07,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:46:07,826 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 103 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:07,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 661 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-12-06 21:46:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 295. [2021-12-06 21:46:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 226 states have (on average 1.7212389380530972) internal successors, (389), 282 states have internal predecessors, (389), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 405 transitions. [2021-12-06 21:46:07,832 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 405 transitions. Word has length 14 [2021-12-06 21:46:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:07,833 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 405 transitions. [2021-12-06 21:46:07,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 405 transitions. [2021-12-06 21:46:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 21:46:07,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:07,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:07,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 21:46:07,833 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:07,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1443078130, now seen corresponding path program 1 times [2021-12-06 21:46:07,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:07,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115718758] [2021-12-06 21:46:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:07,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:07,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:07,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115718758] [2021-12-06 21:46:07,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115718758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:07,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:07,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:46:07,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337342633] [2021-12-06 21:46:07,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:07,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:07,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:07,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:07,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:07,869 INFO L87 Difference]: Start difference. First operand 295 states and 405 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:08,017 INFO L93 Difference]: Finished difference Result 482 states and 619 transitions. [2021-12-06 21:46:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:08,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-06 21:46:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:08,019 INFO L225 Difference]: With dead ends: 482 [2021-12-06 21:46:08,020 INFO L226 Difference]: Without dead ends: 482 [2021-12-06 21:46:08,020 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 [2021-12-06 21:46:08,020 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 272 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:08,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 388 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-12-06 21:46:08,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 301. [2021-12-06 21:46:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 232 states have (on average 1.7025862068965518) internal successors, (395), 288 states have internal predecessors, (395), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 411 transitions. [2021-12-06 21:46:08,029 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 411 transitions. Word has length 17 [2021-12-06 21:46:08,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:08,029 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 411 transitions. [2021-12-06 21:46:08,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 411 transitions. [2021-12-06 21:46:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 21:46:08,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:08,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:08,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 21:46:08,030 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:08,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:08,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1443078131, now seen corresponding path program 1 times [2021-12-06 21:46:08,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:08,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869908921] [2021-12-06 21:46:08,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:08,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:08,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:08,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869908921] [2021-12-06 21:46:08,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869908921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:08,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:08,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:46:08,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019312771] [2021-12-06 21:46:08,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:08,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:08,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:08,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:08,082 INFO L87 Difference]: Start difference. First operand 301 states and 411 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:08,205 INFO L93 Difference]: Finished difference Result 350 states and 431 transitions. [2021-12-06 21:46:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:08,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-06 21:46:08,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:08,206 INFO L225 Difference]: With dead ends: 350 [2021-12-06 21:46:08,207 INFO L226 Difference]: Without dead ends: 350 [2021-12-06 21:46:08,207 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 [2021-12-06 21:46:08,207 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 190 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:08,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 392 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-06 21:46:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 301. [2021-12-06 21:46:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 232 states have (on average 1.6767241379310345) internal successors, (389), 288 states have internal predecessors, (389), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 405 transitions. [2021-12-06 21:46:08,214 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 405 transitions. Word has length 17 [2021-12-06 21:46:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:08,214 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 405 transitions. [2021-12-06 21:46:08,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 405 transitions. [2021-12-06 21:46:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 21:46:08,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:08,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:08,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 21:46:08,215 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:08,215 INFO L85 PathProgramCache]: Analyzing trace with hash 534459326, now seen corresponding path program 1 times [2021-12-06 21:46:08,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:08,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251493747] [2021-12-06 21:46:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:08,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:08,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:08,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251493747] [2021-12-06 21:46:08,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251493747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:08,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:08,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:46:08,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440855796] [2021-12-06 21:46:08,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:08,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:46:08,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:08,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:46:08,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:46:08,238 INFO L87 Difference]: Start difference. First operand 301 states and 405 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:08,312 INFO L93 Difference]: Finished difference Result 397 states and 512 transitions. [2021-12-06 21:46:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:46:08,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-06 21:46:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:08,315 INFO L225 Difference]: With dead ends: 397 [2021-12-06 21:46:08,315 INFO L226 Difference]: Without dead ends: 397 [2021-12-06 21:46:08,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:46:08,315 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 141 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:08,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 281 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:08,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-06 21:46:08,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 298. [2021-12-06 21:46:08,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 232 states have (on average 1.6508620689655173) internal successors, (383), 285 states have internal predecessors, (383), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 399 transitions. [2021-12-06 21:46:08,322 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 399 transitions. Word has length 20 [2021-12-06 21:46:08,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:08,323 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 399 transitions. [2021-12-06 21:46:08,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 399 transitions. [2021-12-06 21:46:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 21:46:08,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:08,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:08,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 21:46:08,323 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:08,324 INFO L85 PathProgramCache]: Analyzing trace with hash 534459327, now seen corresponding path program 1 times [2021-12-06 21:46:08,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:08,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419210705] [2021-12-06 21:46:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:08,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:08,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:08,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419210705] [2021-12-06 21:46:08,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419210705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:08,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:08,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:46:08,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090243531] [2021-12-06 21:46:08,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:08,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:08,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:08,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:08,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:08,364 INFO L87 Difference]: Start difference. First operand 298 states and 399 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:08,487 INFO L93 Difference]: Finished difference Result 517 states and 636 transitions. [2021-12-06 21:46:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:08,488 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-06 21:46:08,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:08,490 INFO L225 Difference]: With dead ends: 517 [2021-12-06 21:46:08,490 INFO L226 Difference]: Without dead ends: 517 [2021-12-06 21:46:08,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:08,490 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 376 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:08,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 456 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-12-06 21:46:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 301. [2021-12-06 21:46:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 236 states have (on average 1.63135593220339) internal successors, (385), 288 states have internal predecessors, (385), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 401 transitions. [2021-12-06 21:46:08,498 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 401 transitions. Word has length 20 [2021-12-06 21:46:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:08,498 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 401 transitions. [2021-12-06 21:46:08,499 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 401 transitions. [2021-12-06 21:46:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 21:46:08,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:08,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:08,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 21:46:08,499 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:08,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash -611630038, now seen corresponding path program 1 times [2021-12-06 21:46:08,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:08,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903771500] [2021-12-06 21:46:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:08,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:08,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:08,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903771500] [2021-12-06 21:46:08,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903771500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:08,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:08,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:46:08,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164502499] [2021-12-06 21:46:08,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:08,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:08,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:08,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:08,551 INFO L87 Difference]: Start difference. First operand 301 states and 401 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:08,675 INFO L93 Difference]: Finished difference Result 516 states and 634 transitions. [2021-12-06 21:46:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:08,675 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-06 21:46:08,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:08,678 INFO L225 Difference]: With dead ends: 516 [2021-12-06 21:46:08,678 INFO L226 Difference]: Without dead ends: 516 [2021-12-06 21:46:08,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:08,679 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 442 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:08,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 407 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-06 21:46:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 303. [2021-12-06 21:46:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 238 states have (on average 1.6260504201680672) internal successors, (387), 290 states have internal predecessors, (387), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 403 transitions. [2021-12-06 21:46:08,690 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 403 transitions. Word has length 21 [2021-12-06 21:46:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:08,691 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 403 transitions. [2021-12-06 21:46:08,691 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 403 transitions. [2021-12-06 21:46:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 21:46:08,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:08,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:08,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 21:46:08,692 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash -611574334, now seen corresponding path program 1 times [2021-12-06 21:46:08,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:08,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738001281] [2021-12-06 21:46:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:08,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:08,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:08,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738001281] [2021-12-06 21:46:08,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738001281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:08,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:08,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:46:08,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691081452] [2021-12-06 21:46:08,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:08,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:46:08,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:08,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:46:08,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:46:08,756 INFO L87 Difference]: Start difference. First operand 303 states and 403 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:08,801 INFO L93 Difference]: Finished difference Result 336 states and 405 transitions. [2021-12-06 21:46:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:46:08,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-06 21:46:08,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:08,803 INFO L225 Difference]: With dead ends: 336 [2021-12-06 21:46:08,803 INFO L226 Difference]: Without dead ends: 336 [2021-12-06 21:46:08,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:46:08,804 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 348 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:08,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 1144 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:08,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-06 21:46:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 303. [2021-12-06 21:46:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 238 states have (on average 1.6176470588235294) internal successors, (385), 290 states have internal predecessors, (385), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 401 transitions. [2021-12-06 21:46:08,810 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 401 transitions. Word has length 21 [2021-12-06 21:46:08,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:08,811 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 401 transitions. [2021-12-06 21:46:08,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 401 transitions. [2021-12-06 21:46:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 21:46:08,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:08,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:08,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 21:46:08,812 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash -611572412, now seen corresponding path program 1 times [2021-12-06 21:46:08,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:08,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823520287] [2021-12-06 21:46:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:08,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:08,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:08,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823520287] [2021-12-06 21:46:08,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823520287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:08,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:08,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:46:08,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024484759] [2021-12-06 21:46:08,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:08,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:46:08,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:46:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:46:08,873 INFO L87 Difference]: Start difference. First operand 303 states and 401 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:08,917 INFO L93 Difference]: Finished difference Result 326 states and 391 transitions. [2021-12-06 21:46:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:46:08,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-06 21:46:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:08,919 INFO L225 Difference]: With dead ends: 326 [2021-12-06 21:46:08,919 INFO L226 Difference]: Without dead ends: 326 [2021-12-06 21:46:08,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:46:08,920 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 337 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:08,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 1134 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-06 21:46:08,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 293. [2021-12-06 21:46:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 230 states have (on average 1.6130434782608696) internal successors, (371), 280 states have internal predecessors, (371), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 21:46:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 387 transitions. [2021-12-06 21:46:08,926 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 387 transitions. Word has length 21 [2021-12-06 21:46:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:08,926 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 387 transitions. [2021-12-06 21:46:08,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 387 transitions. [2021-12-06 21:46:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 21:46:08,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:08,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:08,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 21:46:08,927 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:08,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1215813558, now seen corresponding path program 1 times [2021-12-06 21:46:08,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:08,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277728395] [2021-12-06 21:46:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:08,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:09,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:09,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:09,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277728395] [2021-12-06 21:46:09,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277728395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:09,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:09,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 21:46:09,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7713090] [2021-12-06 21:46:09,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:09,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:46:09,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:09,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:46:09,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:46:09,181 INFO L87 Difference]: Start difference. First operand 293 states and 387 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:09,582 INFO L93 Difference]: Finished difference Result 410 states and 523 transitions. [2021-12-06 21:46:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:46:09,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-06 21:46:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:09,584 INFO L225 Difference]: With dead ends: 410 [2021-12-06 21:46:09,584 INFO L226 Difference]: Without dead ends: 408 [2021-12-06 21:46:09,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:46:09,585 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 253 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:09,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 905 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:46:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-06 21:46:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 345. [2021-12-06 21:46:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 277 states have (on average 1.5884476534296028) internal successors, (440), 328 states have internal predecessors, (440), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 21:46:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 462 transitions. [2021-12-06 21:46:09,593 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 462 transitions. Word has length 23 [2021-12-06 21:46:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:09,593 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 462 transitions. [2021-12-06 21:46:09,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 462 transitions. [2021-12-06 21:46:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 21:46:09,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:09,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:09,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 21:46:09,594 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:09,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash 173365089, now seen corresponding path program 1 times [2021-12-06 21:46:09,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:09,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930404610] [2021-12-06 21:46:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:09,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:09,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:09,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:09,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930404610] [2021-12-06 21:46:09,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930404610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:09,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:09,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:46:09,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620808196] [2021-12-06 21:46:09,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:09,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:46:09,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:46:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:09,623 INFO L87 Difference]: Start difference. First operand 345 states and 462 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:09,712 INFO L93 Difference]: Finished difference Result 536 states and 693 transitions. [2021-12-06 21:46:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:09,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-06 21:46:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:09,714 INFO L225 Difference]: With dead ends: 536 [2021-12-06 21:46:09,715 INFO L226 Difference]: Without dead ends: 536 [2021-12-06 21:46:09,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:09,715 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 464 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:09,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 390 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-12-06 21:46:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 341. [2021-12-06 21:46:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 279 states have (on average 1.5304659498207884) internal successors, (427), 324 states have internal predecessors, (427), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 21:46:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 449 transitions. [2021-12-06 21:46:09,723 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 449 transitions. Word has length 25 [2021-12-06 21:46:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:09,723 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 449 transitions. [2021-12-06 21:46:09,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 449 transitions. [2021-12-06 21:46:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 21:46:09,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:09,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:09,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 21:46:09,724 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash 173365090, now seen corresponding path program 1 times [2021-12-06 21:46:09,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:09,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268009713] [2021-12-06 21:46:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:09,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:09,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:09,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:09,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268009713] [2021-12-06 21:46:09,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268009713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:09,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:09,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:46:09,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169235655] [2021-12-06 21:46:09,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:09,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:46:09,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:09,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:46:09,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:09,784 INFO L87 Difference]: Start difference. First operand 341 states and 449 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:09,929 INFO L93 Difference]: Finished difference Result 499 states and 622 transitions. [2021-12-06 21:46:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:46:09,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-06 21:46:09,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:09,931 INFO L225 Difference]: With dead ends: 499 [2021-12-06 21:46:09,931 INFO L226 Difference]: Without dead ends: 499 [2021-12-06 21:46:09,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:46:09,932 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 327 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:09,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 493 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-12-06 21:46:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 341. [2021-12-06 21:46:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 279 states have (on average 1.5053763440860215) internal successors, (420), 324 states have internal predecessors, (420), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 21:46:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 442 transitions. [2021-12-06 21:46:09,944 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 442 transitions. Word has length 25 [2021-12-06 21:46:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:09,944 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 442 transitions. [2021-12-06 21:46:09,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 442 transitions. [2021-12-06 21:46:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 21:46:09,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:09,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:09,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 21:46:09,945 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:09,945 INFO L85 PathProgramCache]: Analyzing trace with hash -560017875, now seen corresponding path program 1 times [2021-12-06 21:46:09,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:09,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285407753] [2021-12-06 21:46:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:09,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:10,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:10,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:10,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285407753] [2021-12-06 21:46:10,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285407753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:10,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:10,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 21:46:10,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585637222] [2021-12-06 21:46:10,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:10,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:46:10,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:10,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:46:10,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:46:10,055 INFO L87 Difference]: Start difference. First operand 341 states and 442 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:10,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:10,277 INFO L93 Difference]: Finished difference Result 610 states and 767 transitions. [2021-12-06 21:46:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:46:10,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-06 21:46:10,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:10,281 INFO L225 Difference]: With dead ends: 610 [2021-12-06 21:46:10,281 INFO L226 Difference]: Without dead ends: 610 [2021-12-06 21:46:10,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-06 21:46:10,282 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 373 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:10,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 1126 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-06 21:46:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 407. [2021-12-06 21:46:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 342 states have (on average 1.4678362573099415) internal successors, (502), 387 states have internal predecessors, (502), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-06 21:46:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 528 transitions. [2021-12-06 21:46:10,295 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 528 transitions. Word has length 25 [2021-12-06 21:46:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:10,295 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 528 transitions. [2021-12-06 21:46:10,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 528 transitions. [2021-12-06 21:46:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 21:46:10,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:10,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:10,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 21:46:10,296 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1306109328, now seen corresponding path program 1 times [2021-12-06 21:46:10,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:10,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138797605] [2021-12-06 21:46:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:10,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:10,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:10,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:10,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138797605] [2021-12-06 21:46:10,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138797605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:10,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:10,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:46:10,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889101062] [2021-12-06 21:46:10,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:10,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:46:10,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:10,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:46:10,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:46:10,400 INFO L87 Difference]: Start difference. First operand 407 states and 528 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:10,606 INFO L93 Difference]: Finished difference Result 507 states and 622 transitions. [2021-12-06 21:46:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:46:10,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-06 21:46:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:10,608 INFO L225 Difference]: With dead ends: 507 [2021-12-06 21:46:10,608 INFO L226 Difference]: Without dead ends: 507 [2021-12-06 21:46:10,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:46:10,609 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 713 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:10,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 406 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:46:10,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-12-06 21:46:10,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 423. [2021-12-06 21:46:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 363 states have (on average 1.4517906336088153) internal successors, (527), 402 states have internal predecessors, (527), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 21:46:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 555 transitions. [2021-12-06 21:46:10,616 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 555 transitions. Word has length 27 [2021-12-06 21:46:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:10,617 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 555 transitions. [2021-12-06 21:46:10,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:10,617 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 555 transitions. [2021-12-06 21:46:10,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 21:46:10,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:10,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:10,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 21:46:10,617 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:10,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1834683473, now seen corresponding path program 1 times [2021-12-06 21:46:10,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:10,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003883928] [2021-12-06 21:46:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:10,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:10,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:10,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:10,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003883928] [2021-12-06 21:46:10,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003883928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:10,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:10,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:46:10,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245134179] [2021-12-06 21:46:10,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:10,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:46:10,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:10,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:46:10,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:46:10,671 INFO L87 Difference]: Start difference. First operand 423 states and 555 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:10,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:10,774 INFO L93 Difference]: Finished difference Result 442 states and 553 transitions. [2021-12-06 21:46:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:46:10,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-06 21:46:10,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:10,776 INFO L225 Difference]: With dead ends: 442 [2021-12-06 21:46:10,776 INFO L226 Difference]: Without dead ends: 442 [2021-12-06 21:46:10,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:46:10,776 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 402 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:10,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 821 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:10,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-06 21:46:10,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 421. [2021-12-06 21:46:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 363 states have (on average 1.440771349862259) internal successors, (523), 400 states have internal predecessors, (523), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 21:46:10,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 551 transitions. [2021-12-06 21:46:10,784 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 551 transitions. Word has length 28 [2021-12-06 21:46:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:10,784 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 551 transitions. [2021-12-06 21:46:10,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 551 transitions. [2021-12-06 21:46:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 21:46:10,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:10,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:10,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 21:46:10,785 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1486279512, now seen corresponding path program 1 times [2021-12-06 21:46:10,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:10,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920576511] [2021-12-06 21:46:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:10,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:10,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:10,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:10,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920576511] [2021-12-06 21:46:10,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920576511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:10,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:10,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:46:10,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887617443] [2021-12-06 21:46:10,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:10,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:46:10,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:46:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:10,834 INFO L87 Difference]: Start difference. First operand 421 states and 551 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:10,932 INFO L93 Difference]: Finished difference Result 480 states and 611 transitions. [2021-12-06 21:46:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:46:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-12-06 21:46:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:10,934 INFO L225 Difference]: With dead ends: 480 [2021-12-06 21:46:10,934 INFO L226 Difference]: Without dead ends: 480 [2021-12-06 21:46:10,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:46:10,935 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 156 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:10,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 548 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-12-06 21:46:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 421. [2021-12-06 21:46:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 363 states have (on average 1.4352617079889807) internal successors, (521), 400 states have internal predecessors, (521), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 21:46:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 549 transitions. [2021-12-06 21:46:10,942 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 549 transitions. Word has length 29 [2021-12-06 21:46:10,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:10,943 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 549 transitions. [2021-12-06 21:46:10,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 549 transitions. [2021-12-06 21:46:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:46:10,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:10,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:10,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 21:46:10,943 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:10,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1169975593, now seen corresponding path program 1 times [2021-12-06 21:46:10,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:10,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17325234] [2021-12-06 21:46:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:10,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:10,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:11,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:11,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17325234] [2021-12-06 21:46:11,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17325234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:11,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:11,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:46:11,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012972755] [2021-12-06 21:46:11,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:11,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:46:11,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:11,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:46:11,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:11,003 INFO L87 Difference]: Start difference. First operand 421 states and 549 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:11,128 INFO L93 Difference]: Finished difference Result 531 states and 677 transitions. [2021-12-06 21:46:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:46:11,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-06 21:46:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:11,131 INFO L225 Difference]: With dead ends: 531 [2021-12-06 21:46:11,131 INFO L226 Difference]: Without dead ends: 531 [2021-12-06 21:46:11,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:46:11,132 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 149 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:11,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 501 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-06 21:46:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 465. [2021-12-06 21:46:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 404 states have (on average 1.4207920792079207) internal successors, (574), 442 states have internal predecessors, (574), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 21:46:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 606 transitions. [2021-12-06 21:46:11,144 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 606 transitions. Word has length 30 [2021-12-06 21:46:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:11,144 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 606 transitions. [2021-12-06 21:46:11,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 606 transitions. [2021-12-06 21:46:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:46:11,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:11,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:11,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 21:46:11,145 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:11,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2100742417, now seen corresponding path program 1 times [2021-12-06 21:46:11,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:11,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997358236] [2021-12-06 21:46:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:11,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:11,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:11,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:11,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997358236] [2021-12-06 21:46:11,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997358236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:11,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:11,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:46:11,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082454531] [2021-12-06 21:46:11,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:11,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:46:11,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:11,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:46:11,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:46:11,245 INFO L87 Difference]: Start difference. First operand 465 states and 606 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:11,461 INFO L93 Difference]: Finished difference Result 548 states and 667 transitions. [2021-12-06 21:46:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:46:11,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-06 21:46:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:11,463 INFO L225 Difference]: With dead ends: 548 [2021-12-06 21:46:11,464 INFO L226 Difference]: Without dead ends: 548 [2021-12-06 21:46:11,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-12-06 21:46:11,464 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 942 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:11,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [942 Valid, 358 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:11,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-12-06 21:46:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 466. [2021-12-06 21:46:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 406 states have (on average 1.4113300492610839) internal successors, (573), 442 states have internal predecessors, (573), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-06 21:46:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 607 transitions. [2021-12-06 21:46:11,471 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 607 transitions. Word has length 30 [2021-12-06 21:46:11,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:11,472 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 607 transitions. [2021-12-06 21:46:11,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 607 transitions. [2021-12-06 21:46:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 21:46:11,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:11,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:11,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 21:46:11,472 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:11,473 INFO L85 PathProgramCache]: Analyzing trace with hash -252550768, now seen corresponding path program 1 times [2021-12-06 21:46:11,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:11,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617102717] [2021-12-06 21:46:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:11,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:11,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:11,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:11,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617102717] [2021-12-06 21:46:11,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617102717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:11,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:11,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:46:11,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470332135] [2021-12-06 21:46:11,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:11,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:46:11,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:11,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:46:11,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:11,511 INFO L87 Difference]: Start difference. First operand 466 states and 607 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:11,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:11,528 INFO L93 Difference]: Finished difference Result 556 states and 716 transitions. [2021-12-06 21:46:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:46:11,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-12-06 21:46:11,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:11,531 INFO L225 Difference]: With dead ends: 556 [2021-12-06 21:46:11,531 INFO L226 Difference]: Without dead ends: 556 [2021-12-06 21:46:11,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:46:11,532 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 184 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:11,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 622 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-12-06 21:46:11,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 466. [2021-12-06 21:46:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 406 states have (on average 1.4064039408866995) internal successors, (571), 442 states have internal predecessors, (571), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-06 21:46:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 605 transitions. [2021-12-06 21:46:11,540 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 605 transitions. Word has length 32 [2021-12-06 21:46:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:11,540 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 605 transitions. [2021-12-06 21:46:11,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 605 transitions. [2021-12-06 21:46:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 21:46:11,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:11,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:11,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 21:46:11,541 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:11,541 INFO L85 PathProgramCache]: Analyzing trace with hash -252548846, now seen corresponding path program 1 times [2021-12-06 21:46:11,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:11,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271397347] [2021-12-06 21:46:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:11,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:11,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:11,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:11,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271397347] [2021-12-06 21:46:11,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271397347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:11,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:11,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:46:11,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130221161] [2021-12-06 21:46:11,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:11,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:46:11,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:11,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:46:11,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:46:11,606 INFO L87 Difference]: Start difference. First operand 466 states and 605 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:11,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:11,736 INFO L93 Difference]: Finished difference Result 724 states and 929 transitions. [2021-12-06 21:46:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:46:11,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-12-06 21:46:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:11,739 INFO L225 Difference]: With dead ends: 724 [2021-12-06 21:46:11,739 INFO L226 Difference]: Without dead ends: 724 [2021-12-06 21:46:11,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:46:11,740 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 443 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:11,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 998 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:11,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-12-06 21:46:11,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 463. [2021-12-06 21:46:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 406 states have (on average 1.3891625615763548) internal successors, (564), 439 states have internal predecessors, (564), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-06 21:46:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 598 transitions. [2021-12-06 21:46:11,748 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 598 transitions. Word has length 32 [2021-12-06 21:46:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:11,749 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 598 transitions. [2021-12-06 21:46:11,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 598 transitions. [2021-12-06 21:46:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 21:46:11,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:11,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:11,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 21:46:11,749 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:11,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:11,754 INFO L85 PathProgramCache]: Analyzing trace with hash -934879925, now seen corresponding path program 1 times [2021-12-06 21:46:11,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:11,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17860736] [2021-12-06 21:46:11,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:11,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:11,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:11,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:11,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17860736] [2021-12-06 21:46:11,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17860736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:11,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:11,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:46:11,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415562575] [2021-12-06 21:46:11,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:11,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:46:11,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:46:11,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:46:11,830 INFO L87 Difference]: Start difference. First operand 463 states and 598 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:12,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:12,122 INFO L93 Difference]: Finished difference Result 915 states and 1167 transitions. [2021-12-06 21:46:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:46:12,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-12-06 21:46:12,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:12,127 INFO L225 Difference]: With dead ends: 915 [2021-12-06 21:46:12,127 INFO L226 Difference]: Without dead ends: 915 [2021-12-06 21:46:12,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:46:12,128 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 338 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:12,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 830 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:46:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-12-06 21:46:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 540. [2021-12-06 21:46:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 477 states have (on average 1.379454926624738) internal successors, (658), 512 states have internal predecessors, (658), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 21:46:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 700 transitions. [2021-12-06 21:46:12,143 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 700 transitions. Word has length 32 [2021-12-06 21:46:12,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:12,143 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 700 transitions. [2021-12-06 21:46:12,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:12,144 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 700 transitions. [2021-12-06 21:46:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 21:46:12,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:12,144 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, 1] [2021-12-06 21:46:12,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 21:46:12,145 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:12,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1427861429, now seen corresponding path program 1 times [2021-12-06 21:46:12,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:12,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357116382] [2021-12-06 21:46:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:12,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:12,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 21:46:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:12,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357116382] [2021-12-06 21:46:12,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357116382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965862270] [2021-12-06 21:46:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:12,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:12,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:12,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:12,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:46:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:12,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:46:12,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:46:12,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:46:12,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965862270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:12,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:46:12,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-06 21:46:12,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764029972] [2021-12-06 21:46:12,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:12,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:46:12,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:46:12,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:46:12,277 INFO L87 Difference]: Start difference. First operand 540 states and 700 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:12,284 INFO L93 Difference]: Finished difference Result 549 states and 708 transitions. [2021-12-06 21:46:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:46:12,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-12-06 21:46:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:12,288 INFO L225 Difference]: With dead ends: 549 [2021-12-06 21:46:12,288 INFO L226 Difference]: Without dead ends: 548 [2021-12-06 21:46:12,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:46:12,289 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:12,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 269 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-12-06 21:46:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 544. [2021-12-06 21:46:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 481 states have (on average 1.3742203742203742) internal successors, (661), 516 states have internal predecessors, (661), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 21:46:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 703 transitions. [2021-12-06 21:46:12,301 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 703 transitions. Word has length 33 [2021-12-06 21:46:12,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:12,301 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 703 transitions. [2021-12-06 21:46:12,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 703 transitions. [2021-12-06 21:46:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 21:46:12,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:12,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:12,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:46:12,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:12,503 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:12,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2049457417, now seen corresponding path program 1 times [2021-12-06 21:46:12,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:12,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674234022] [2021-12-06 21:46:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:12,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:12,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 21:46:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:46:12,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674234022] [2021-12-06 21:46:12,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674234022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:12,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:12,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 21:46:12,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734819132] [2021-12-06 21:46:12,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:12,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 21:46:12,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:12,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 21:46:12,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:46:12,799 INFO L87 Difference]: Start difference. First operand 544 states and 703 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:13,298 INFO L93 Difference]: Finished difference Result 576 states and 731 transitions. [2021-12-06 21:46:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 21:46:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-12-06 21:46:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:13,301 INFO L225 Difference]: With dead ends: 576 [2021-12-06 21:46:13,301 INFO L226 Difference]: Without dead ends: 575 [2021-12-06 21:46:13,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:46:13,302 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 275 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:13,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 978 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:46:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-12-06 21:46:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 500. [2021-12-06 21:46:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 440 states have (on average 1.3704545454545454) internal successors, (603), 474 states have internal predecessors, (603), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 21:46:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 641 transitions. [2021-12-06 21:46:13,312 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 641 transitions. Word has length 33 [2021-12-06 21:46:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:13,312 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 641 transitions. [2021-12-06 21:46:13,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 641 transitions. [2021-12-06 21:46:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 21:46:13,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:13,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:13,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 21:46:13,313 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:13,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1083493612, now seen corresponding path program 1 times [2021-12-06 21:46:13,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:13,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630352088] [2021-12-06 21:46:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:13,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:13,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:13,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630352088] [2021-12-06 21:46:13,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630352088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:13,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:13,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:46:13,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455679167] [2021-12-06 21:46:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:13,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:46:13,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:46:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:46:13,397 INFO L87 Difference]: Start difference. First operand 500 states and 641 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:13,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:13,590 INFO L93 Difference]: Finished difference Result 749 states and 929 transitions. [2021-12-06 21:46:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:46:13,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-12-06 21:46:13,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:13,593 INFO L225 Difference]: With dead ends: 749 [2021-12-06 21:46:13,593 INFO L226 Difference]: Without dead ends: 749 [2021-12-06 21:46:13,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:46:13,594 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 442 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:13,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 568 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:13,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-06 21:46:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 500. [2021-12-06 21:46:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 440 states have (on average 1.3590909090909091) internal successors, (598), 474 states have internal predecessors, (598), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 21:46:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 636 transitions. [2021-12-06 21:46:13,604 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 636 transitions. Word has length 33 [2021-12-06 21:46:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:13,604 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 636 transitions. [2021-12-06 21:46:13,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 636 transitions. [2021-12-06 21:46:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 21:46:13,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:13,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:13,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 21:46:13,605 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2113699762, now seen corresponding path program 1 times [2021-12-06 21:46:13,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:13,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019030364] [2021-12-06 21:46:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:13,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:13,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:13,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:13,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019030364] [2021-12-06 21:46:13,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019030364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:13,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:13,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:46:13,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389837197] [2021-12-06 21:46:13,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:13,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:46:13,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:46:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:46:13,720 INFO L87 Difference]: Start difference. First operand 500 states and 636 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:13,848 INFO L93 Difference]: Finished difference Result 537 states and 677 transitions. [2021-12-06 21:46:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:46:13,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-12-06 21:46:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:13,850 INFO L225 Difference]: With dead ends: 537 [2021-12-06 21:46:13,850 INFO L226 Difference]: Without dead ends: 537 [2021-12-06 21:46:13,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:46:13,851 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 97 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:13,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 658 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-12-06 21:46:13,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 500. [2021-12-06 21:46:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 440 states have (on average 1.3545454545454545) internal successors, (596), 474 states have internal predecessors, (596), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 21:46:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 634 transitions. [2021-12-06 21:46:13,857 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 634 transitions. Word has length 34 [2021-12-06 21:46:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:13,858 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 634 transitions. [2021-12-06 21:46:13,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 634 transitions. [2021-12-06 21:46:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 21:46:13,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:13,858 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:13,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 21:46:13,858 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:13,859 INFO L85 PathProgramCache]: Analyzing trace with hash 949188435, now seen corresponding path program 1 times [2021-12-06 21:46:13,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:13,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987853678] [2021-12-06 21:46:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:13,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:13,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:13,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-06 21:46:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:46:13,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:13,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987853678] [2021-12-06 21:46:13,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987853678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:13,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:13,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:46:13,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339614928] [2021-12-06 21:46:13,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:13,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:46:13,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:46:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:46:13,886 INFO L87 Difference]: Start difference. First operand 500 states and 634 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:13,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:13,891 INFO L93 Difference]: Finished difference Result 502 states and 636 transitions. [2021-12-06 21:46:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:46:13,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-12-06 21:46:13,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:13,893 INFO L225 Difference]: With dead ends: 502 [2021-12-06 21:46:13,893 INFO L226 Difference]: Without dead ends: 502 [2021-12-06 21:46:13,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:46:13,894 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:13,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 270 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-12-06 21:46:13,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2021-12-06 21:46:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 442 states have (on average 1.3529411764705883) internal successors, (598), 476 states have internal predecessors, (598), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 21:46:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 636 transitions. [2021-12-06 21:46:13,901 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 636 transitions. Word has length 41 [2021-12-06 21:46:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:13,901 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 636 transitions. [2021-12-06 21:46:13,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 636 transitions. [2021-12-06 21:46:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 21:46:13,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:13,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:13,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 21:46:13,902 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:13,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:13,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1758535061, now seen corresponding path program 1 times [2021-12-06 21:46:13,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:13,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121028921] [2021-12-06 21:46:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:13,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:14,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:14,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-06 21:46:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:14,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:14,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121028921] [2021-12-06 21:46:14,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121028921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:14,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589515719] [2021-12-06 21:46:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:14,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:14,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:14,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:14,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:46:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:14,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 21:46:14,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:14,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:14,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:46:14,550 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 29 treesize of output 33 [2021-12-06 21:46:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:46:14,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589515719] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:46:14,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:46:14,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 8] total 27 [2021-12-06 21:46:14,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005918568] [2021-12-06 21:46:14,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:14,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 21:46:14,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:14,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 21:46:14,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-12-06 21:46:14,734 INFO L87 Difference]: Start difference. First operand 502 states and 636 transitions. Second operand has 28 states, 27 states have (on average 4.037037037037037) internal successors, (109), 24 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:46:15,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:15,035 INFO L93 Difference]: Finished difference Result 521 states and 636 transitions. [2021-12-06 21:46:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:46:15,036 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.037037037037037) internal successors, (109), 24 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2021-12-06 21:46:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:15,038 INFO L225 Difference]: With dead ends: 521 [2021-12-06 21:46:15,038 INFO L226 Difference]: Without dead ends: 521 [2021-12-06 21:46:15,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2021-12-06 21:46:15,039 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 1240 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:15,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1242 Valid, 1409 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:46:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-06 21:46:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 499. [2021-12-06 21:46:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 440 states have (on average 1.3454545454545455) internal successors, (592), 474 states have internal predecessors, (592), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 21:46:15,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 630 transitions. [2021-12-06 21:46:15,046 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 630 transitions. Word has length 41 [2021-12-06 21:46:15,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:15,046 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 630 transitions. [2021-12-06 21:46:15,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.037037037037037) internal successors, (109), 24 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:46:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 630 transitions. [2021-12-06 21:46:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 21:46:15,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:15,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:15,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 21:46:15,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 21:46:15,248 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1516271307, now seen corresponding path program 1 times [2021-12-06 21:46:15,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:15,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791770811] [2021-12-06 21:46:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:15,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:15,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:15,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 21:46:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:15,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791770811] [2021-12-06 21:46:15,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791770811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252438173] [2021-12-06 21:46:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:15,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:15,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:15,302 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:15,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:46:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:15,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 21:46:15,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:15,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:15,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252438173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:46:15,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:46:15,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-06 21:46:15,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60671760] [2021-12-06 21:46:15,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:15,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:46:15,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:15,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:46:15,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:46:15,475 INFO L87 Difference]: Start difference. First operand 499 states and 630 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 21:46:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:15,530 INFO L93 Difference]: Finished difference Result 1115 states and 1402 transitions. [2021-12-06 21:46:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:46:15,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2021-12-06 21:46:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:15,534 INFO L225 Difference]: With dead ends: 1115 [2021-12-06 21:46:15,535 INFO L226 Difference]: Without dead ends: 1115 [2021-12-06 21:46:15,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:46:15,535 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 687 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:15,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 707 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-12-06 21:46:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 661. [2021-12-06 21:46:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 596 states have (on average 1.3154362416107384) internal successors, (784), 630 states have internal predecessors, (784), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-06 21:46:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 834 transitions. [2021-12-06 21:46:15,546 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 834 transitions. Word has length 44 [2021-12-06 21:46:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:15,546 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 834 transitions. [2021-12-06 21:46:15,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 21:46:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 834 transitions. [2021-12-06 21:46:15,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 21:46:15,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:15,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:15,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:46:15,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 21:46:15,747 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:15,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:15,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2077631411, now seen corresponding path program 1 times [2021-12-06 21:46:15,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:15,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265112141] [2021-12-06 21:46:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:15,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:15,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:15,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 21:46:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:15,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:15,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265112141] [2021-12-06 21:46:15,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265112141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:15,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183721328] [2021-12-06 21:46:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:15,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:15,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:15,818 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:15,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:46:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:15,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 21:46:15,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:16,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:46:16,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183721328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:16,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:46:16,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2021-12-06 21:46:16,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714289910] [2021-12-06 21:46:16,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:16,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:46:16,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:46:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:46:16,080 INFO L87 Difference]: Start difference. First operand 661 states and 834 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:16,216 INFO L93 Difference]: Finished difference Result 849 states and 1043 transitions. [2021-12-06 21:46:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:46:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-06 21:46:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:16,220 INFO L225 Difference]: With dead ends: 849 [2021-12-06 21:46:16,220 INFO L226 Difference]: Without dead ends: 849 [2021-12-06 21:46:16,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:46:16,221 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 577 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:16,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 359 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-12-06 21:46:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 658. [2021-12-06 21:46:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 596 states have (on average 1.3036912751677852) internal successors, (777), 627 states have internal predecessors, (777), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-06 21:46:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 827 transitions. [2021-12-06 21:46:16,231 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 827 transitions. Word has length 44 [2021-12-06 21:46:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:16,231 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 827 transitions. [2021-12-06 21:46:16,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 827 transitions. [2021-12-06 21:46:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 21:46:16,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:16,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:16,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:46:16,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 21:46:16,433 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash 990140495, now seen corresponding path program 1 times [2021-12-06 21:46:16,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:16,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049906604] [2021-12-06 21:46:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:16,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:16,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:16,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 21:46:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:16,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:16,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049906604] [2021-12-06 21:46:16,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049906604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:16,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308333856] [2021-12-06 21:46:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:16,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:16,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:16,474 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:16,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:46:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:16,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 21:46:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:16,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:16,660 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 21:46:16,660 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 12 treesize of output 11 [2021-12-06 21:46:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:16,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308333856] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:46:16,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:46:16,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-06 21:46:16,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323386313] [2021-12-06 21:46:16,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:16,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 21:46:16,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 21:46:16,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:46:16,693 INFO L87 Difference]: Start difference. First operand 658 states and 827 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 21:46:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:17,159 INFO L93 Difference]: Finished difference Result 2170 states and 2701 transitions. [2021-12-06 21:46:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:46:17,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2021-12-06 21:46:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:17,167 INFO L225 Difference]: With dead ends: 2170 [2021-12-06 21:46:17,167 INFO L226 Difference]: Without dead ends: 2170 [2021-12-06 21:46:17,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-12-06 21:46:17,167 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 1818 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:17,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 1268 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 21:46:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-12-06 21:46:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 868. [2021-12-06 21:46:17,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 792 states have (on average 1.2941919191919191) internal successors, (1025), 825 states have internal predecessors, (1025), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 30 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-06 21:46:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1097 transitions. [2021-12-06 21:46:17,184 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1097 transitions. Word has length 46 [2021-12-06 21:46:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:17,185 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1097 transitions. [2021-12-06 21:46:17,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 21:46:17,185 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1097 transitions. [2021-12-06 21:46:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 21:46:17,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:17,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:17,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:46:17,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 21:46:17,387 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:17,388 INFO L85 PathProgramCache]: Analyzing trace with hash -201066803, now seen corresponding path program 1 times [2021-12-06 21:46:17,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:17,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008547395] [2021-12-06 21:46:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:17,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:17,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:17,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:17,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008547395] [2021-12-06 21:46:17,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008547395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:17,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324686147] [2021-12-06 21:46:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:17,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:17,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:17,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:17,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:46:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 21:46:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:17,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:17,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324686147] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:46:17,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:46:17,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 7 [2021-12-06 21:46:17,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103602750] [2021-12-06 21:46:17,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:17,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:46:17,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:17,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:46:17,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:46:17,618 INFO L87 Difference]: Start difference. First operand 868 states and 1097 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:46:17,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:17,657 INFO L93 Difference]: Finished difference Result 2836 states and 3566 transitions. [2021-12-06 21:46:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:46:17,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-12-06 21:46:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:17,667 INFO L225 Difference]: With dead ends: 2836 [2021-12-06 21:46:17,667 INFO L226 Difference]: Without dead ends: 2836 [2021-12-06 21:46:17,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:46:17,667 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 436 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:17,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 757 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2021-12-06 21:46:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 1979. [2021-12-06 21:46:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1843 states have (on average 1.289744981009224) internal successors, (2377), 1880 states have internal predecessors, (2377), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-06 21:46:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 2533 transitions. [2021-12-06 21:46:17,697 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 2533 transitions. Word has length 45 [2021-12-06 21:46:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:17,697 INFO L470 AbstractCegarLoop]: Abstraction has 1979 states and 2533 transitions. [2021-12-06 21:46:17,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:46:17,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 2533 transitions. [2021-12-06 21:46:17,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 21:46:17,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:17,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:17,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 21:46:17,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 21:46:17,898 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:17,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:17,899 INFO L85 PathProgramCache]: Analyzing trace with hash -202913845, now seen corresponding path program 1 times [2021-12-06 21:46:17,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:17,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924191003] [2021-12-06 21:46:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:17,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:18,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:18,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:18,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924191003] [2021-12-06 21:46:18,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924191003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:18,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730409625] [2021-12-06 21:46:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:18,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:18,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:18,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:18,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:46:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:18,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 21:46:18,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:18,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:46:18,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730409625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:18,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:46:18,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2021-12-06 21:46:18,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282252302] [2021-12-06 21:46:18,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:18,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:46:18,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:18,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:46:18,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:46:18,338 INFO L87 Difference]: Start difference. First operand 1979 states and 2533 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:18,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:18,436 INFO L93 Difference]: Finished difference Result 2027 states and 2564 transitions. [2021-12-06 21:46:18,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:46:18,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-06 21:46:18,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:18,443 INFO L225 Difference]: With dead ends: 2027 [2021-12-06 21:46:18,443 INFO L226 Difference]: Without dead ends: 2027 [2021-12-06 21:46:18,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:46:18,444 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 395 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:18,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 439 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-12-06 21:46:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1981. [2021-12-06 21:46:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1845 states have (on average 1.2899728997289972) internal successors, (2380), 1882 states have internal predecessors, (2380), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-06 21:46:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 2536 transitions. [2021-12-06 21:46:18,467 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 2536 transitions. Word has length 45 [2021-12-06 21:46:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:18,467 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 2536 transitions. [2021-12-06 21:46:18,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 2536 transitions. [2021-12-06 21:46:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 21:46:18,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:18,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:18,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 21:46:18,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:18,670 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:18,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash -202913783, now seen corresponding path program 1 times [2021-12-06 21:46:18,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:18,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126124147] [2021-12-06 21:46:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:18,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:18,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:18,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126124147] [2021-12-06 21:46:18,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126124147] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247361200] [2021-12-06 21:46:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:18,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:18,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:18,801 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:18,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 21:46:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:18,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 21:46:18,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:19,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:46:19,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247361200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:19,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:46:19,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2021-12-06 21:46:19,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196130169] [2021-12-06 21:46:19,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:19,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:46:19,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:19,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:46:19,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:46:19,077 INFO L87 Difference]: Start difference. First operand 1981 states and 2536 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:19,172 INFO L93 Difference]: Finished difference Result 2026 states and 2562 transitions. [2021-12-06 21:46:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:46:19,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-06 21:46:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:19,180 INFO L225 Difference]: With dead ends: 2026 [2021-12-06 21:46:19,180 INFO L226 Difference]: Without dead ends: 2026 [2021-12-06 21:46:19,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:46:19,181 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 387 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:19,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 388 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:19,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-12-06 21:46:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1978. [2021-12-06 21:46:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1843 states have (on average 1.288659793814433) internal successors, (2375), 1879 states have internal predecessors, (2375), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-06 21:46:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2531 transitions. [2021-12-06 21:46:19,208 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2531 transitions. Word has length 45 [2021-12-06 21:46:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:19,208 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2531 transitions. [2021-12-06 21:46:19,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2531 transitions. [2021-12-06 21:46:19,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 21:46:19,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:19,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:19,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 21:46:19,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:19,411 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1987177000, now seen corresponding path program 1 times [2021-12-06 21:46:19,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:19,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437717691] [2021-12-06 21:46:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:19,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:19,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:19,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:19,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437717691] [2021-12-06 21:46:19,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437717691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:19,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:19,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-06 21:46:19,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157152987] [2021-12-06 21:46:19,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:19,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 21:46:19,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:19,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 21:46:19,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:46:19,802 INFO L87 Difference]: Start difference. First operand 1978 states and 2531 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:20,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:20,360 INFO L93 Difference]: Finished difference Result 2138 states and 2700 transitions. [2021-12-06 21:46:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 21:46:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-12-06 21:46:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:20,364 INFO L225 Difference]: With dead ends: 2138 [2021-12-06 21:46:20,365 INFO L226 Difference]: Without dead ends: 2138 [2021-12-06 21:46:20,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=642, Unknown=0, NotChecked=0, Total=930 [2021-12-06 21:46:20,365 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1221 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:20,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 1156 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:46:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-12-06 21:46:20,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1850. [2021-12-06 21:46:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1718 states have (on average 1.2922002328288709) internal successors, (2220), 1753 states have internal predecessors, (2220), 73 states have call successors, (73), 33 states have call predecessors, (73), 33 states have return successors, (73), 63 states have call predecessors, (73), 73 states have call successors, (73) [2021-12-06 21:46:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2366 transitions. [2021-12-06 21:46:20,385 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2366 transitions. Word has length 48 [2021-12-06 21:46:20,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:20,385 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 2366 transitions. [2021-12-06 21:46:20,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2366 transitions. [2021-12-06 21:46:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 21:46:20,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:20,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:20,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-06 21:46:20,386 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:20,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:20,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1987176999, now seen corresponding path program 1 times [2021-12-06 21:46:20,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:20,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498108177] [2021-12-06 21:46:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:20,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:20,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:20,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:20,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498108177] [2021-12-06 21:46:20,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498108177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:20,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:20,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-06 21:46:20,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43945545] [2021-12-06 21:46:20,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:20,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 21:46:20,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:20,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 21:46:20,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:46:20,864 INFO L87 Difference]: Start difference. First operand 1850 states and 2366 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:21,561 INFO L93 Difference]: Finished difference Result 2197 states and 2785 transitions. [2021-12-06 21:46:21,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 21:46:21,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-12-06 21:46:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:21,565 INFO L225 Difference]: With dead ends: 2197 [2021-12-06 21:46:21,565 INFO L226 Difference]: Without dead ends: 2197 [2021-12-06 21:46:21,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=569, Unknown=0, NotChecked=0, Total=812 [2021-12-06 21:46:21,565 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 1553 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1553 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:21,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1553 Valid, 891 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:46:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-12-06 21:46:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2063. [2021-12-06 21:46:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 1915 states have (on average 1.3070496083550913) internal successors, (2503), 1954 states have internal predecessors, (2503), 83 states have call successors, (83), 39 states have call predecessors, (83), 39 states have return successors, (83), 69 states have call predecessors, (83), 83 states have call successors, (83) [2021-12-06 21:46:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 2669 transitions. [2021-12-06 21:46:21,590 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 2669 transitions. Word has length 48 [2021-12-06 21:46:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:21,590 INFO L470 AbstractCegarLoop]: Abstraction has 2063 states and 2669 transitions. [2021-12-06 21:46:21,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 2669 transitions. [2021-12-06 21:46:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 21:46:21,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:21,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:21,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-06 21:46:21,591 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:21,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:21,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1985329958, now seen corresponding path program 1 times [2021-12-06 21:46:21,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:21,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064047562] [2021-12-06 21:46:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:21,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:22,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:22,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:22,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064047562] [2021-12-06 21:46:22,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064047562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:22,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:22,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 21:46:22,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538837005] [2021-12-06 21:46:22,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:22,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 21:46:22,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:22,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 21:46:22,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:46:22,383 INFO L87 Difference]: Start difference. First operand 2063 states and 2669 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:22,969 INFO L93 Difference]: Finished difference Result 2100 states and 2707 transitions. [2021-12-06 21:46:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:46:22,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-12-06 21:46:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:22,973 INFO L225 Difference]: With dead ends: 2100 [2021-12-06 21:46:22,973 INFO L226 Difference]: Without dead ends: 2100 [2021-12-06 21:46:22,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-12-06 21:46:22,973 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 102 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:22,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1151 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:46:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-12-06 21:46:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2087. [2021-12-06 21:46:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 1939 states have (on average 1.3042805569881382) internal successors, (2529), 1978 states have internal predecessors, (2529), 83 states have call successors, (83), 39 states have call predecessors, (83), 39 states have return successors, (83), 69 states have call predecessors, (83), 83 states have call successors, (83) [2021-12-06 21:46:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 2695 transitions. [2021-12-06 21:46:22,992 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 2695 transitions. Word has length 48 [2021-12-06 21:46:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:22,993 INFO L470 AbstractCegarLoop]: Abstraction has 2087 states and 2695 transitions. [2021-12-06 21:46:22,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 2695 transitions. [2021-12-06 21:46:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 21:46:22,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:22,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:22,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-06 21:46:22,994 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:22,995 INFO L85 PathProgramCache]: Analyzing trace with hash -894968564, now seen corresponding path program 1 times [2021-12-06 21:46:22,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:22,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198135282] [2021-12-06 21:46:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:22,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:23,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:23,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:23,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198135282] [2021-12-06 21:46:23,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198135282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:23,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:23,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 21:46:23,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284440299] [2021-12-06 21:46:23,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:23,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 21:46:23,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:23,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 21:46:23,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:46:23,153 INFO L87 Difference]: Start difference. First operand 2087 states and 2695 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:23,594 INFO L93 Difference]: Finished difference Result 2715 states and 3441 transitions. [2021-12-06 21:46:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 21:46:23,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-12-06 21:46:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:23,597 INFO L225 Difference]: With dead ends: 2715 [2021-12-06 21:46:23,597 INFO L226 Difference]: Without dead ends: 2715 [2021-12-06 21:46:23,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2021-12-06 21:46:23,598 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 975 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:23,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 1318 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:46:23,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-12-06 21:46:23,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2341. [2021-12-06 21:46:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2161 states have (on average 1.3035631652012958) internal successors, (2817), 2220 states have internal predecessors, (2817), 109 states have call successors, (109), 45 states have call predecessors, (109), 45 states have return successors, (109), 75 states have call predecessors, (109), 109 states have call successors, (109) [2021-12-06 21:46:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 3035 transitions. [2021-12-06 21:46:23,620 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 3035 transitions. Word has length 49 [2021-12-06 21:46:23,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:23,620 INFO L470 AbstractCegarLoop]: Abstraction has 2341 states and 3035 transitions. [2021-12-06 21:46:23,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 3035 transitions. [2021-12-06 21:46:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 21:46:23,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:23,621 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:23,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-06 21:46:23,621 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:23,622 INFO L85 PathProgramCache]: Analyzing trace with hash -894968563, now seen corresponding path program 1 times [2021-12-06 21:46:23,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:23,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445102063] [2021-12-06 21:46:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:23,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:23,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:23,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:23,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445102063] [2021-12-06 21:46:23,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445102063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:23,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:23,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 21:46:23,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979309296] [2021-12-06 21:46:23,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:23,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 21:46:23,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:23,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 21:46:23,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:46:23,816 INFO L87 Difference]: Start difference. First operand 2341 states and 3035 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:24,233 INFO L93 Difference]: Finished difference Result 2853 states and 3625 transitions. [2021-12-06 21:46:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:46:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-12-06 21:46:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:24,237 INFO L225 Difference]: With dead ends: 2853 [2021-12-06 21:46:24,237 INFO L226 Difference]: Without dead ends: 2853 [2021-12-06 21:46:24,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-12-06 21:46:24,238 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 1005 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:24,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 1088 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:46:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2853 states. [2021-12-06 21:46:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2853 to 2543. [2021-12-06 21:46:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2347 states have (on average 1.3144439710268427) internal successors, (3085), 2410 states have internal predecessors, (3085), 119 states have call successors, (119), 51 states have call predecessors, (119), 51 states have return successors, (119), 81 states have call predecessors, (119), 119 states have call successors, (119) [2021-12-06 21:46:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 3323 transitions. [2021-12-06 21:46:24,264 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 3323 transitions. Word has length 49 [2021-12-06 21:46:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:24,264 INFO L470 AbstractCegarLoop]: Abstraction has 2543 states and 3323 transitions. [2021-12-06 21:46:24,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 3323 transitions. [2021-12-06 21:46:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 21:46:24,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:24,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:24,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-06 21:46:24,265 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:24,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2031481280, now seen corresponding path program 1 times [2021-12-06 21:46:24,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:24,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937002651] [2021-12-06 21:46:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:24,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:24,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:24,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:24,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937002651] [2021-12-06 21:46:24,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937002651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:24,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540507580] [2021-12-06 21:46:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:24,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:24,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:24,291 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:24,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 21:46:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:24,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:46:24,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:24,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:46:24,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540507580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:24,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:46:24,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-06 21:46:24,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488463276] [2021-12-06 21:46:24,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:24,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:24,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:24,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:24,404 INFO L87 Difference]: Start difference. First operand 2543 states and 3323 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:24,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:24,422 INFO L93 Difference]: Finished difference Result 3075 states and 4041 transitions. [2021-12-06 21:46:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:24,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-06 21:46:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:24,426 INFO L225 Difference]: With dead ends: 3075 [2021-12-06 21:46:24,426 INFO L226 Difference]: Without dead ends: 3075 [2021-12-06 21:46:24,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:24,426 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 212 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:24,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 336 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2021-12-06 21:46:24,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2978. [2021-12-06 21:46:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2770 states have (on average 1.3285198555956679) internal successors, (3680), 2833 states have internal predecessors, (3680), 131 states have call successors, (131), 51 states have call predecessors, (131), 51 states have return successors, (131), 93 states have call predecessors, (131), 131 states have call successors, (131) [2021-12-06 21:46:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 3942 transitions. [2021-12-06 21:46:24,461 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 3942 transitions. Word has length 50 [2021-12-06 21:46:24,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:24,461 INFO L470 AbstractCegarLoop]: Abstraction has 2978 states and 3942 transitions. [2021-12-06 21:46:24,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 3942 transitions. [2021-12-06 21:46:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 21:46:24,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:24,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:24,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 21:46:24,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:24,663 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:24,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1111433432, now seen corresponding path program 1 times [2021-12-06 21:46:24,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:24,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438804274] [2021-12-06 21:46:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:24,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:25,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:25,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:46:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:25,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:25,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438804274] [2021-12-06 21:46:25,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438804274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:25,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:25,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-06 21:46:25,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6819849] [2021-12-06 21:46:25,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:25,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 21:46:25,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:25,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 21:46:25,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:46:25,103 INFO L87 Difference]: Start difference. First operand 2978 states and 3942 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:26,130 INFO L93 Difference]: Finished difference Result 3251 states and 4205 transitions. [2021-12-06 21:46:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 21:46:26,130 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-06 21:46:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:26,134 INFO L225 Difference]: With dead ends: 3251 [2021-12-06 21:46:26,134 INFO L226 Difference]: Without dead ends: 3249 [2021-12-06 21:46:26,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 21:46:26,135 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 1252 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:26,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 2193 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 21:46:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2021-12-06 21:46:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 2936. [2021-12-06 21:46:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2731 states have (on average 1.326254119370194) internal successors, (3622), 2793 states have internal predecessors, (3622), 129 states have call successors, (129), 50 states have call predecessors, (129), 50 states have return successors, (129), 92 states have call predecessors, (129), 129 states have call successors, (129) [2021-12-06 21:46:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 3880 transitions. [2021-12-06 21:46:26,165 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 3880 transitions. Word has length 51 [2021-12-06 21:46:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:26,166 INFO L470 AbstractCegarLoop]: Abstraction has 2936 states and 3880 transitions. [2021-12-06 21:46:26,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 3880 transitions. [2021-12-06 21:46:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 21:46:26,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:26,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:26,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-06 21:46:26,167 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:26,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:26,167 INFO L85 PathProgramCache]: Analyzing trace with hash -38812235, now seen corresponding path program 1 times [2021-12-06 21:46:26,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:26,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659670956] [2021-12-06 21:46:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:26,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:26,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:26,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:26,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659670956] [2021-12-06 21:46:26,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659670956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:26,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:26,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:46:26,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293629062] [2021-12-06 21:46:26,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:26,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:26,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:26,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:26,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:26,211 INFO L87 Difference]: Start difference. First operand 2936 states and 3880 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:26,227 INFO L93 Difference]: Finished difference Result 3766 states and 5039 transitions. [2021-12-06 21:46:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:26,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-06 21:46:26,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:26,233 INFO L225 Difference]: With dead ends: 3766 [2021-12-06 21:46:26,233 INFO L226 Difference]: Without dead ends: 3766 [2021-12-06 21:46:26,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:26,234 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 122 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:26,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 554 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2021-12-06 21:46:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 2561. [2021-12-06 21:46:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2380 states have (on average 1.307563025210084) internal successors, (3112), 2438 states have internal predecessors, (3112), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (114), 81 states have call predecessors, (114), 114 states have call successors, (114) [2021-12-06 21:46:26,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3340 transitions. [2021-12-06 21:46:26,266 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3340 transitions. Word has length 51 [2021-12-06 21:46:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:26,266 INFO L470 AbstractCegarLoop]: Abstraction has 2561 states and 3340 transitions. [2021-12-06 21:46:26,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3340 transitions. [2021-12-06 21:46:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 21:46:26,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:26,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:26,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-06 21:46:26,267 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:26,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:26,267 INFO L85 PathProgramCache]: Analyzing trace with hash -86585480, now seen corresponding path program 1 times [2021-12-06 21:46:26,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:26,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677566858] [2021-12-06 21:46:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:26,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:26,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:26,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:26,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677566858] [2021-12-06 21:46:26,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677566858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:26,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897753930] [2021-12-06 21:46:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:26,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:26,341 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:26,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 21:46:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:26,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 21:46:26,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:26,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:46:26,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 21:46:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:46:26,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:46:26,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897753930] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:46:26,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:46:26,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2021-12-06 21:46:26,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616475824] [2021-12-06 21:46:26,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:26,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 21:46:26,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:26,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 21:46:26,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:46:26,807 INFO L87 Difference]: Start difference. First operand 2561 states and 3340 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:46:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:27,241 INFO L93 Difference]: Finished difference Result 3822 states and 4997 transitions. [2021-12-06 21:46:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 21:46:27,242 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2021-12-06 21:46:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:27,247 INFO L225 Difference]: With dead ends: 3822 [2021-12-06 21:46:27,247 INFO L226 Difference]: Without dead ends: 3814 [2021-12-06 21:46:27,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-06 21:46:27,248 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 747 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:27,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1692 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:46:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2021-12-06 21:46:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 2573. [2021-12-06 21:46:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2392 states have (on average 1.3047658862876255) internal successors, (3121), 2450 states have internal predecessors, (3121), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (114), 81 states have call predecessors, (114), 114 states have call successors, (114) [2021-12-06 21:46:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 3349 transitions. [2021-12-06 21:46:27,282 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 3349 transitions. Word has length 52 [2021-12-06 21:46:27,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:27,282 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 3349 transitions. [2021-12-06 21:46:27,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:46:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 3349 transitions. [2021-12-06 21:46:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 21:46:27,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:27,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:27,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 21:46:27,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 21:46:27,484 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:27,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1958066468, now seen corresponding path program 1 times [2021-12-06 21:46:27,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:27,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590537944] [2021-12-06 21:46:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:27,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:27,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:27,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590537944] [2021-12-06 21:46:27,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590537944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:27,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:27,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 21:46:27,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030725384] [2021-12-06 21:46:27,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:27,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 21:46:27,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:27,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 21:46:27,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:46:27,790 INFO L87 Difference]: Start difference. First operand 2573 states and 3349 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:28,248 INFO L93 Difference]: Finished difference Result 2756 states and 3546 transitions. [2021-12-06 21:46:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 21:46:28,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-06 21:46:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:28,252 INFO L225 Difference]: With dead ends: 2756 [2021-12-06 21:46:28,252 INFO L226 Difference]: Without dead ends: 2756 [2021-12-06 21:46:28,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-12-06 21:46:28,252 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 1319 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:28,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 965 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:46:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-12-06 21:46:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2587. [2021-12-06 21:46:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2406 states have (on average 1.3046550290939318) internal successors, (3139), 2464 states have internal predecessors, (3139), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (114), 81 states have call predecessors, (114), 114 states have call successors, (114) [2021-12-06 21:46:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 3367 transitions. [2021-12-06 21:46:28,278 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 3367 transitions. Word has length 52 [2021-12-06 21:46:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:28,278 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 3367 transitions. [2021-12-06 21:46:28,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 3367 transitions. [2021-12-06 21:46:28,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 21:46:28,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:28,279 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:28,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-06 21:46:28,279 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1148719842, now seen corresponding path program 1 times [2021-12-06 21:46:28,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:28,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415236526] [2021-12-06 21:46:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:28,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:28,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:28,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:28,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415236526] [2021-12-06 21:46:28,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415236526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:28,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:28,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 21:46:28,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697292025] [2021-12-06 21:46:28,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:28,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 21:46:28,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 21:46:28,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:46:28,427 INFO L87 Difference]: Start difference. First operand 2587 states and 3367 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:28,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:28,786 INFO L93 Difference]: Finished difference Result 2975 states and 3808 transitions. [2021-12-06 21:46:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 21:46:28,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-06 21:46:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:28,789 INFO L225 Difference]: With dead ends: 2975 [2021-12-06 21:46:28,789 INFO L226 Difference]: Without dead ends: 2975 [2021-12-06 21:46:28,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-12-06 21:46:28,790 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 1000 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:28,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 1014 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:46:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-12-06 21:46:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2574. [2021-12-06 21:46:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2574 states, 2393 states have (on average 1.3046385290430422) internal successors, (3122), 2451 states have internal predecessors, (3122), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (114), 81 states have call predecessors, (114), 114 states have call successors, (114) [2021-12-06 21:46:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 3350 transitions. [2021-12-06 21:46:28,826 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 3350 transitions. Word has length 52 [2021-12-06 21:46:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:28,826 INFO L470 AbstractCegarLoop]: Abstraction has 2574 states and 3350 transitions. [2021-12-06 21:46:28,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:46:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 3350 transitions. [2021-12-06 21:46:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 21:46:28,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:28,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:28,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-06 21:46:28,828 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1366968916, now seen corresponding path program 1 times [2021-12-06 21:46:28,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:28,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657126291] [2021-12-06 21:46:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:28,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:28,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:28,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:46:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:46:28,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:28,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657126291] [2021-12-06 21:46:28,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657126291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:28,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:28,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:46:28,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353229371] [2021-12-06 21:46:28,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:28,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:46:28,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:28,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:46:28,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:46:28,898 INFO L87 Difference]: Start difference. First operand 2574 states and 3350 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:46:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:29,029 INFO L93 Difference]: Finished difference Result 2902 states and 3756 transitions. [2021-12-06 21:46:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:46:29,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2021-12-06 21:46:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:29,032 INFO L225 Difference]: With dead ends: 2902 [2021-12-06 21:46:29,032 INFO L226 Difference]: Without dead ends: 2902 [2021-12-06 21:46:29,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:46:29,032 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 416 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:29,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 412 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2021-12-06 21:46:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2572. [2021-12-06 21:46:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2393 states have (on average 1.2971165900543251) internal successors, (3104), 2449 states have internal predecessors, (3104), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (114), 81 states have call predecessors, (114), 114 states have call successors, (114) [2021-12-06 21:46:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 3332 transitions. [2021-12-06 21:46:29,073 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 3332 transitions. Word has length 53 [2021-12-06 21:46:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:29,073 INFO L470 AbstractCegarLoop]: Abstraction has 2572 states and 3332 transitions. [2021-12-06 21:46:29,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:46:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 3332 transitions. [2021-12-06 21:46:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 21:46:29,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:29,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:29,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-06 21:46:29,075 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash 633585951, now seen corresponding path program 1 times [2021-12-06 21:46:29,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:29,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498506906] [2021-12-06 21:46:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:29,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:29,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:29,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 21:46:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:46:29,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:29,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498506906] [2021-12-06 21:46:29,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498506906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:29,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802595733] [2021-12-06 21:46:29,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:29,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:29,419 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:29,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 21:46:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:29,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 21:46:29,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:29,601 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 [2021-12-06 21:46:29,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 21:46:29,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:46:29,814 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 29 treesize of output 28 [2021-12-06 21:46:29,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-06 21:46:29,925 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 21:46:29,925 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 [2021-12-06 21:46:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:29,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:30,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802595733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:30,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:46:30,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2021-12-06 21:46:30,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221561060] [2021-12-06 21:46:30,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:30,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 21:46:30,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 21:46:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 21:46:30,048 INFO L87 Difference]: Start difference. First operand 2572 states and 3332 transitions. Second operand has 32 states, 31 states have (on average 3.0) internal successors, (93), 29 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 21:46:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:31,228 INFO L93 Difference]: Finished difference Result 3493 states and 4525 transitions. [2021-12-06 21:46:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 21:46:31,228 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.0) internal successors, (93), 29 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2021-12-06 21:46:31,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:31,230 INFO L225 Difference]: With dead ends: 3493 [2021-12-06 21:46:31,231 INFO L226 Difference]: Without dead ends: 3493 [2021-12-06 21:46:31,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=801, Invalid=2739, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 21:46:31,231 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1992 mSDsluCounter, 2014 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:31,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1994 Valid, 2249 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 21:46:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2021-12-06 21:46:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 2594. [2021-12-06 21:46:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2415 states have (on average 1.288198757763975) internal successors, (3111), 2471 states have internal predecessors, (3111), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (114), 81 states have call predecessors, (114), 114 states have call successors, (114) [2021-12-06 21:46:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 3339 transitions. [2021-12-06 21:46:31,255 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 3339 transitions. Word has length 53 [2021-12-06 21:46:31,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:31,255 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 3339 transitions. [2021-12-06 21:46:31,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.0) internal successors, (93), 29 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 21:46:31,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 3339 transitions. [2021-12-06 21:46:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 21:46:31,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:31,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:31,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 21:46:31,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-06 21:46:31,457 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:31,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:31,458 INFO L85 PathProgramCache]: Analyzing trace with hash 633585952, now seen corresponding path program 1 times [2021-12-06 21:46:31,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:31,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550742315] [2021-12-06 21:46:31,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:31,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:31,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:31,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 21:46:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:46:31,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:31,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550742315] [2021-12-06 21:46:31,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550742315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:31,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190407115] [2021-12-06 21:46:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:31,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:31,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:31,967 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:31,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 21:46:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:32,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-06 21:46:32,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:32,223 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 [2021-12-06 21:46:32,238 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 21:46:32,238 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 [2021-12-06 21:46:32,378 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 14 treesize of output 16 [2021-12-06 21:46:32,390 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 14 treesize of output 16 [2021-12-06 21:46:32,416 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 14 treesize of output 16 [2021-12-06 21:46:32,424 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 14 treesize of output 16 [2021-12-06 21:46:32,440 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 14 treesize of output 16 [2021-12-06 21:46:32,448 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 14 treesize of output 16 [2021-12-06 21:46:32,648 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 21:46:32,648 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 1 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 21:46:32,658 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 21:46:32,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 21:46:32,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:46:32,940 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-12-06 21:46:32,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 44 [2021-12-06 21:46:32,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:46:32,951 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-12-06 21:46:32,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 61 [2021-12-06 21:46:33,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:46:33,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2021-12-06 21:46:33,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:46:33,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 21:46:33,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:46:33,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:46:33,423 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 21:46:33,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2021-12-06 21:46:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:33,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:33,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190407115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:33,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:46:33,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 32 [2021-12-06 21:46:33,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505392832] [2021-12-06 21:46:33,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:33,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 21:46:33,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 21:46:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 21:46:33,997 INFO L87 Difference]: Start difference. First operand 2594 states and 3339 transitions. Second operand has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 21:46:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:35,918 INFO L93 Difference]: Finished difference Result 5229 states and 6694 transitions. [2021-12-06 21:46:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 21:46:35,919 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2021-12-06 21:46:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:35,923 INFO L225 Difference]: With dead ends: 5229 [2021-12-06 21:46:35,923 INFO L226 Difference]: Without dead ends: 5229 [2021-12-06 21:46:35,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=660, Invalid=5192, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 21:46:35,924 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 604 mSDsluCounter, 3406 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 3603 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1028 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:35,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 3603 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1026 Invalid, 0 Unknown, 1028 Unchecked, 0.4s Time] [2021-12-06 21:46:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2021-12-06 21:46:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 4442. [2021-12-06 21:46:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4442 states, 4150 states have (on average 1.2843373493975903) internal successors, (5330), 4231 states have internal predecessors, (5330), 201 states have call successors, (201), 67 states have call predecessors, (201), 67 states have return successors, (201), 143 states have call predecessors, (201), 201 states have call successors, (201) [2021-12-06 21:46:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4442 states to 4442 states and 5732 transitions. [2021-12-06 21:46:35,966 INFO L78 Accepts]: Start accepts. Automaton has 4442 states and 5732 transitions. Word has length 53 [2021-12-06 21:46:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:35,966 INFO L470 AbstractCegarLoop]: Abstraction has 4442 states and 5732 transitions. [2021-12-06 21:46:35,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 21:46:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4442 states and 5732 transitions. [2021-12-06 21:46:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 21:46:35,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:35,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:35,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 21:46:36,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-06 21:46:36,169 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:36,170 INFO L85 PathProgramCache]: Analyzing trace with hash 385346035, now seen corresponding path program 1 times [2021-12-06 21:46:36,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:36,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475714964] [2021-12-06 21:46:36,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:36,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:36,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 21:46:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:36,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 21:46:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:36,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:36,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475714964] [2021-12-06 21:46:36,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475714964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:36,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003646262] [2021-12-06 21:46:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:36,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:36,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:36,269 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:36,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 21:46:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:36,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 21:46:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:36,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:46:36,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 21:46:36,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:46:36,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 21:46:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:36,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:46:36,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003646262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:36,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:46:36,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2021-12-06 21:46:36,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403217199] [2021-12-06 21:46:36,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:36,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:46:36,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:36,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:46:36,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:46:36,525 INFO L87 Difference]: Start difference. First operand 4442 states and 5732 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:36,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:36,749 INFO L93 Difference]: Finished difference Result 4514 states and 5789 transitions. [2021-12-06 21:46:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:46:36,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-12-06 21:46:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:36,753 INFO L225 Difference]: With dead ends: 4514 [2021-12-06 21:46:36,754 INFO L226 Difference]: Without dead ends: 4514 [2021-12-06 21:46:36,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:46:36,754 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 220 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:36,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 1101 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2021-12-06 21:46:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 3857. [2021-12-06 21:46:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3605 states have (on average 1.279611650485437) internal successors, (4613), 3676 states have internal predecessors, (4613), 176 states have call successors, (176), 52 states have call predecessors, (176), 52 states have return successors, (176), 128 states have call predecessors, (176), 176 states have call successors, (176) [2021-12-06 21:46:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 4965 transitions. [2021-12-06 21:46:36,794 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 4965 transitions. Word has length 54 [2021-12-06 21:46:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:36,794 INFO L470 AbstractCegarLoop]: Abstraction has 3857 states and 4965 transitions. [2021-12-06 21:46:36,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 4965 transitions. [2021-12-06 21:46:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 21:46:36,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:36,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:36,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 21:46:36,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:36,996 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash -885676746, now seen corresponding path program 1 times [2021-12-06 21:46:36,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:36,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709233328] [2021-12-06 21:46:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:36,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:37,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:37,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 21:46:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:46:37,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:37,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709233328] [2021-12-06 21:46:37,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709233328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:37,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:37,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 21:46:37,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887407921] [2021-12-06 21:46:37,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:37,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 21:46:37,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:37,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 21:46:37,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:46:37,218 INFO L87 Difference]: Start difference. First operand 3857 states and 4965 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:37,389 INFO L93 Difference]: Finished difference Result 3957 states and 5066 transitions. [2021-12-06 21:46:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 21:46:37,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-12-06 21:46:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:37,393 INFO L225 Difference]: With dead ends: 3957 [2021-12-06 21:46:37,393 INFO L226 Difference]: Without dead ends: 3957 [2021-12-06 21:46:37,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:46:37,394 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1052 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:37,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1052 Valid, 468 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:46:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2021-12-06 21:46:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3806. [2021-12-06 21:46:37,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3806 states, 3555 states have (on average 1.268917018284107) internal successors, (4511), 3626 states have internal predecessors, (4511), 175 states have call successors, (175), 52 states have call predecessors, (175), 52 states have return successors, (175), 127 states have call predecessors, (175), 175 states have call successors, (175) [2021-12-06 21:46:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3806 states to 3806 states and 4861 transitions. [2021-12-06 21:46:37,429 INFO L78 Accepts]: Start accepts. Automaton has 3806 states and 4861 transitions. Word has length 54 [2021-12-06 21:46:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:37,430 INFO L470 AbstractCegarLoop]: Abstraction has 3806 states and 4861 transitions. [2021-12-06 21:46:37,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3806 states and 4861 transitions. [2021-12-06 21:46:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 21:46:37,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:37,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:37,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-06 21:46:37,431 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:37,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1487364529, now seen corresponding path program 1 times [2021-12-06 21:46:37,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:37,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235380725] [2021-12-06 21:46:37,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:37,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:37,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:37,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:37,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235380725] [2021-12-06 21:46:37,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235380725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:37,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688831640] [2021-12-06 21:46:37,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:37,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:37,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:37,461 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:37,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 21:46:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:37,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 21:46:37,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:37,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:37,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688831640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:46:37,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:46:37,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2021-12-06 21:46:37,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24680785] [2021-12-06 21:46:37,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:46:37,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:46:37,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:37,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:46:37,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:37,626 INFO L87 Difference]: Start difference. First operand 3806 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:37,654 INFO L93 Difference]: Finished difference Result 7727 states and 9999 transitions. [2021-12-06 21:46:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:46:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2021-12-06 21:46:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:37,663 INFO L225 Difference]: With dead ends: 7727 [2021-12-06 21:46:37,663 INFO L226 Difference]: Without dead ends: 7727 [2021-12-06 21:46:37,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:37,664 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 351 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:37,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 549 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:46:37,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-12-06 21:46:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 6015. [2021-12-06 21:46:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6015 states, 5671 states have (on average 1.2879562687356727) internal successors, (7304), 5752 states have internal predecessors, (7304), 268 states have call successors, (268), 52 states have call predecessors, (268), 52 states have return successors, (268), 210 states have call predecessors, (268), 268 states have call successors, (268) [2021-12-06 21:46:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6015 states to 6015 states and 7840 transitions. [2021-12-06 21:46:37,739 INFO L78 Accepts]: Start accepts. Automaton has 6015 states and 7840 transitions. Word has length 55 [2021-12-06 21:46:37,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:37,739 INFO L470 AbstractCegarLoop]: Abstraction has 6015 states and 7840 transitions. [2021-12-06 21:46:37,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:46:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 6015 states and 7840 transitions. [2021-12-06 21:46:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 21:46:37,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:37,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:37,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 21:46:37,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:37,941 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-06 21:46:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:37,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1136338587, now seen corresponding path program 1 times [2021-12-06 21:46:37,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:37,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987598457] [2021-12-06 21:46:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:37,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:38,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 21:46:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:38,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:38,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987598457] [2021-12-06 21:46:38,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987598457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:46:38,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543386330] [2021-12-06 21:46:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:38,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:46:38,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:46:38,376 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:46:38,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aaa186e-062c-41bd-a9af-2957873201ba/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 21:46:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:38,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 21:46:38,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:46:38,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 21:46:38,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:46:38,870 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 43 treesize of output 34 [2021-12-06 21:46:39,006 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 33 treesize of output 15 [2021-12-06 21:46:39,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 5 [2021-12-06 21:46:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:46:39,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:46:41,204 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1251 Int)) (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1251)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4)))))) (forall ((v_ArrVal_1251 Int)) (= |c_ULTIMATE.start_main_old_#valid#1| (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1251)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))))) (store |c_#valid| .cse0 (select |c_ULTIMATE.start_main_old_#valid#1| .cse0)))))) is different from false [2021-12-06 21:46:41,273 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 130 treesize of output 122 [2021-12-06 21:46:41,364 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 166 treesize of output 150