./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test27-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test27-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2292364e3df3925555991c57490c078c89b959e0 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:12:06,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:12:06,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:12:06,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:12:06,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:12:06,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:12:06,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:12:06,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:12:06,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:12:06,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:12:06,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:12:06,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:12:06,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:12:06,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:12:06,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:12:06,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:12:06,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:12:06,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:12:06,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:12:06,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:12:06,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:12:06,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:12:06,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:12:06,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:12:06,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:12:06,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:12:06,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:12:06,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:12:06,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:12:06,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:12:06,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:12:06,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:12:06,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:12:06,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:12:06,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:12:06,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:12:06,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:12:06,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:12:06,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:12:06,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:12:06,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:12:06,607 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 01:12:06,639 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:12:06,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:12:06,640 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:12:06,640 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:12:06,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:12:06,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:12:06,642 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:12:06,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:12:06,643 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:12:06,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:12:06,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:12:06,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:12:06,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 01:12:06,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:12:06,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 01:12:06,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:12:06,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 01:12:06,645 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:12:06,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 01:12:06,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:12:06,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:12:06,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:12:06,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:12:06,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:12:06,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:12:06,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 01:12:06,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:12:06,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 01:12:06,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 01:12:06,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:12:06,649 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_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2292364e3df3925555991c57490c078c89b959e0 [2021-10-13 01:12:06,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:12:06,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:12:07,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:12:07,003 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:12:07,004 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:12:07,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/ldv-regression/test27-2.c [2021-10-13 01:12:07,100 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/data/044283cff/1c548fef1a9c4cc48228d2869dc74b77/FLAG43f1bcf2c [2021-10-13 01:12:07,630 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:12:07,631 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/sv-benchmarks/c/ldv-regression/test27-2.c [2021-10-13 01:12:07,638 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/data/044283cff/1c548fef1a9c4cc48228d2869dc74b77/FLAG43f1bcf2c [2021-10-13 01:12:08,005 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/data/044283cff/1c548fef1a9c4cc48228d2869dc74b77 [2021-10-13 01:12:08,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:12:08,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 01:12:08,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:12:08,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:12:08,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:12:08,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f2a1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08, skipping insertion in model container [2021-10-13 01:12:08,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:12:08,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:12:08,237 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2021-10-13 01:12:08,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:12:08,249 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:12:08,273 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2021-10-13 01:12:08,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:12:08,303 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:12:08,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08 WrapperNode [2021-10-13 01:12:08,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:12:08,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 01:12:08,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 01:12:08,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 01:12:08,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 01:12:08,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:12:08,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:12:08,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:12:08,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:12:08,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:12:08,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:12:08,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:12:08,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08" (1/1) ... [2021-10-13 01:12:08,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:12:08,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:08,426 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:08,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:12:08,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 01:12:08,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 01:12:08,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 01:12:08,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:12:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 01:12:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:12:08,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:12:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 01:12:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:12:08,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:12:08,978 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 01:12:08,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:12:08 BoogieIcfgContainer [2021-10-13 01:12:08,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:12:08,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:12:08,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:12:09,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:12:09,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:12:08" (1/3) ... [2021-10-13 01:12:09,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c84023f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:12:09, skipping insertion in model container [2021-10-13 01:12:09,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:08" (2/3) ... [2021-10-13 01:12:09,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c84023f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:12:09, skipping insertion in model container [2021-10-13 01:12:09,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:12:08" (3/3) ... [2021-10-13 01:12:09,006 INFO L111 eAbstractionObserver]: Analyzing ICFG test27-2.c [2021-10-13 01:12:09,016 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:12:09,017 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 01:12:09,078 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:12:09,089 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-10-13 01:12:09,091 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 01:12:09,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 01:12:09,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:12:09,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:12:09,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:12:09,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:09,139 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2021-10-13 01:12:09,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:09,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009782275] [2021-10-13 01:12:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:09,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:09,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:12:09,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009782275] [2021-10-13 01:12:09,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009782275] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:12:09,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:12:09,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:12:09,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267189644] [2021-10-13 01:12:09,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 01:12:09,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:12:09,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 01:12:09,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:12:09,377 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:12:09,418 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2021-10-13 01:12:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:12:09,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 01:12:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:12:09,430 INFO L225 Difference]: With dead ends: 32 [2021-10-13 01:12:09,431 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 01:12:09,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:12:09,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 01:12:09,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-10-13 01:12:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-13 01:12:09,472 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-10-13 01:12:09,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:12:09,472 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-13 01:12:09,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:09,473 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-13 01:12:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 01:12:09,474 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:12:09,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:12:09,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 01:12:09,475 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:12:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2021-10-13 01:12:09,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:09,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950885297] [2021-10-13 01:12:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:09,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:09,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:12:09,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950885297] [2021-10-13 01:12:09,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950885297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:09,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66407361] [2021-10-13 01:12:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:09,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:09,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:12:09,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 01:12:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:09,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 01:12:09,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:12:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:09,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66407361] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:09,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:12:09,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-13 01:12:09,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532568016] [2021-10-13 01:12:09,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:12:09,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:12:09,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:12:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:12:09,881 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:09,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:12:09,912 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-13 01:12:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:12:09,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 01:12:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:12:09,914 INFO L225 Difference]: With dead ends: 26 [2021-10-13 01:12:09,914 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 01:12:09,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:12:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 01:12:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-10-13 01:12:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-13 01:12:09,920 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2021-10-13 01:12:09,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:12:09,921 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-13 01:12:09,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:09,922 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-13 01:12:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 01:12:09,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:12:09,923 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:12:09,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:10,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:10,150 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:12:10,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:10,151 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2021-10-13 01:12:10,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:10,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982120973] [2021-10-13 01:12:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:10,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:10,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:12:10,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982120973] [2021-10-13 01:12:10,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982120973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:10,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074858645] [2021-10-13 01:12:10,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:12:10,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:10,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:10,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:12:10,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 01:12:10,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:12:10,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:12:10,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 01:12:10,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:12:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:10,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074858645] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:10,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:12:10,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-13 01:12:10,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569830420] [2021-10-13 01:12:10,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:12:10,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:12:10,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:12:10,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:12:10,632 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:12:10,672 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-10-13 01:12:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:12:10,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 01:12:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:12:10,676 INFO L225 Difference]: With dead ends: 28 [2021-10-13 01:12:10,677 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 01:12:10,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:12:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 01:12:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-10-13 01:12:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-13 01:12:10,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2021-10-13 01:12:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:12:10,688 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-13 01:12:10,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-13 01:12:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 01:12:10,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:12:10,691 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:12:10,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:10,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:10,916 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:12:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash 123871506, now seen corresponding path program 3 times [2021-10-13 01:12:10,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:10,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439592264] [2021-10-13 01:12:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:10,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:11,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:12:11,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439592264] [2021-10-13 01:12:11,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439592264] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:11,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808249863] [2021-10-13 01:12:11,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 01:12:11,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:11,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:11,130 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:12:11,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 01:12:11,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 01:12:11,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:12:11,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 01:12:11,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:12:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:11,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808249863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:11,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:12:11,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-13 01:12:11,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799916246] [2021-10-13 01:12:11,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:12:11,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:12:11,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:12:11,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:12:11,442 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:12:11,479 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-10-13 01:12:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:12:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 01:12:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:12:11,481 INFO L225 Difference]: With dead ends: 30 [2021-10-13 01:12:11,481 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 01:12:11,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:12:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 01:12:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-10-13 01:12:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-13 01:12:11,487 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-10-13 01:12:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:12:11,487 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-13 01:12:11,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-13 01:12:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 01:12:11,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:12:11,489 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:12:11,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:11,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:11,716 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:12:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:11,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1444204464, now seen corresponding path program 4 times [2021-10-13 01:12:11,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:11,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433410209] [2021-10-13 01:12:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:11,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:11,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:12:11,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433410209] [2021-10-13 01:12:11,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433410209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:11,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908884981] [2021-10-13 01:12:11,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 01:12:11,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:11,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:11,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:12:11,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 01:12:11,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 01:12:11,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:12:11,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 01:12:11,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:12:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:11,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908884981] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:11,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:12:11,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-13 01:12:11,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546782507] [2021-10-13 01:12:11,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:12:11,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:12:11,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:12:11,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:12:11,996 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:12:12,034 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-10-13 01:12:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:12:12,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 01:12:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:12:12,036 INFO L225 Difference]: With dead ends: 32 [2021-10-13 01:12:12,036 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 01:12:12,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:12:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 01:12:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-10-13 01:12:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-13 01:12:12,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-10-13 01:12:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:12:12,043 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-13 01:12:12,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-13 01:12:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 01:12:12,044 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:12:12,044 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:12:12,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:12,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:12,262 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:12:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash -831690738, now seen corresponding path program 5 times [2021-10-13 01:12:12,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:12,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957461482] [2021-10-13 01:12:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:12,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:12,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:12:12,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957461482] [2021-10-13 01:12:12,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957461482] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:12,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644477360] [2021-10-13 01:12:12,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 01:12:12,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:12,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:12,400 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:12:12,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 01:12:13,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-13 01:12:13,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:12:13,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:12:13,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:12:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:13,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644477360] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:13,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:12:13,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-13 01:12:13,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968520361] [2021-10-13 01:12:13,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:12:13,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:12:13,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:12:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:12:13,257 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:12:13,304 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-10-13 01:12:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:12:13,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 01:12:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:12:13,306 INFO L225 Difference]: With dead ends: 34 [2021-10-13 01:12:13,306 INFO L226 Difference]: Without dead ends: 25 [2021-10-13 01:12:13,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:12:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-13 01:12:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-10-13 01:12:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-13 01:12:13,310 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2021-10-13 01:12:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:12:13,311 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-13 01:12:13,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-13 01:12:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 01:12:13,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:12:13,313 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:12:13,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:13,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-13 01:12:13,514 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:12:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 6 times [2021-10-13 01:12:13,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:13,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092183065] [2021-10-13 01:12:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:13,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:13,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:12:13,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092183065] [2021-10-13 01:12:13,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092183065] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:13,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094292585] [2021-10-13 01:12:13,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 01:12:13,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:13,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:13,623 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:12:13,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 01:12:15,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-13 01:12:15,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:12:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 01:12:15,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:12:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:15,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094292585] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:15,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:12:15,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-13 01:12:15,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785363394] [2021-10-13 01:12:15,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:12:15,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:12:15,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:12:15,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:12:15,333 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:12:15,384 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-10-13 01:12:15,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 01:12:15,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 01:12:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:12:15,389 INFO L225 Difference]: With dead ends: 36 [2021-10-13 01:12:15,389 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 01:12:15,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:12:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 01:12:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-10-13 01:12:15,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-13 01:12:15,394 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2021-10-13 01:12:15,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:12:15,395 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-13 01:12:15,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-13 01:12:15,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 01:12:15,396 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:12:15,396 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:12:15,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:15,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:15,611 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:12:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:15,611 INFO L82 PathProgramCache]: Analyzing trace with hash 4509962, now seen corresponding path program 7 times [2021-10-13 01:12:15,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:15,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978916992] [2021-10-13 01:12:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:15,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:15,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:12:15,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978916992] [2021-10-13 01:12:15,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978916992] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:15,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626298434] [2021-10-13 01:12:15,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 01:12:15,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:15,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:15,722 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:12:15,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 01:12:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:15,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 01:12:15,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:12:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:15,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626298434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:15,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:12:15,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-13 01:12:15,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46800384] [2021-10-13 01:12:15,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:12:15,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:12:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:12:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:12:15,978 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:16,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:12:16,045 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-10-13 01:12:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:12:16,046 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 01:12:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:12:16,047 INFO L225 Difference]: With dead ends: 38 [2021-10-13 01:12:16,047 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 01:12:16,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:12:16,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 01:12:16,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-10-13 01:12:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-13 01:12:16,055 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2021-10-13 01:12:16,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:12:16,055 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-13 01:12:16,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-13 01:12:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 01:12:16,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:12:16,057 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:12:16,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:16,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-13 01:12:16,284 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:12:16,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:16,284 INFO L82 PathProgramCache]: Analyzing trace with hash -186531256, now seen corresponding path program 8 times [2021-10-13 01:12:16,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:16,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529123461] [2021-10-13 01:12:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:16,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:16,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:12:16,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529123461] [2021-10-13 01:12:16,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529123461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:16,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5723345] [2021-10-13 01:12:16,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:12:16,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:16,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:16,426 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:12:16,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 01:12:16,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:12:16,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:12:16,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 01:12:16,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:12:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:16,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5723345] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:16,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:12:16,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-13 01:12:16,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753373025] [2021-10-13 01:12:16,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:12:16,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:12:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:12:16,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:12:16,717 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:16,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:12:16,795 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-10-13 01:12:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:12:16,797 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 01:12:16,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:12:16,798 INFO L225 Difference]: With dead ends: 40 [2021-10-13 01:12:16,798 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 01:12:16,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:12:16,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 01:12:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-10-13 01:12:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-13 01:12:16,802 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2021-10-13 01:12:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:12:16,803 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-13 01:12:16,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-13 01:12:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 01:12:16,804 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:12:16,805 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:12:16,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:17,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:17,028 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:12:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash 906451974, now seen corresponding path program 9 times [2021-10-13 01:12:17,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:17,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299084689] [2021-10-13 01:12:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:17,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:12:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:17,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:12:17,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299084689] [2021-10-13 01:12:17,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299084689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:17,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978987504] [2021-10-13 01:12:17,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 01:12:17,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:17,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:17,205 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:12:17,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 01:12:20,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-13 01:12:20,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:12:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 01:12:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:12:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:12:20,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978987504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:12:20,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:12:20,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-13 01:12:20,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002247431] [2021-10-13 01:12:20,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:12:20,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:12:20,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:12:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:12:20,733 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:20,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:12:20,796 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-10-13 01:12:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 01:12:20,797 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-13 01:12:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:12:20,797 INFO L225 Difference]: With dead ends: 41 [2021-10-13 01:12:20,798 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 01:12:20,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:12:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 01:12:20,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-13 01:12:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-13 01:12:20,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2021-10-13 01:12:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:12:20,803 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-13 01:12:20,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:12:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-13 01:12:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 01:12:20,805 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:12:20,805 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:12:20,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 01:12:21,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:12:21,012 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:12:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:12:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1003651516, now seen corresponding path program 10 times [2021-10-13 01:12:21,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:12:21,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519401410] [2021-10-13 01:12:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:12:21,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:12:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:12:21,445 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:12:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:12:21,916 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:12:21,916 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 01:12:21,917 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 01:12:21,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 01:12:21,927 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:12:22,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:12:22 BoogieIcfgContainer [2021-10-13 01:12:22,009 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:12:22,010 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:12:22,010 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:12:22,010 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:12:22,011 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:12:08" (3/4) ... [2021-10-13 01:12:22,013 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 01:12:22,085 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 01:12:22,085 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:12:22,087 INFO L168 Benchmark]: Toolchain (without parser) took 14076.11 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 61.9 MB in the beginning and 65.1 MB in the end (delta: -3.1 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-10-13 01:12:22,087 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory was 58.6 MB in the beginning and 58.6 MB in the end (delta: 25.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:12:22,088 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.45 ms. Allocated memory is still 90.2 MB. Free memory was 61.8 MB in the beginning and 51.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 01:12:22,088 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.54 ms. Allocated memory is still 90.2 MB. Free memory was 51.5 MB in the beginning and 49.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:12:22,089 INFO L168 Benchmark]: Boogie Preprocessor took 32.37 ms. Allocated memory is still 90.2 MB. Free memory was 49.8 MB in the beginning and 48.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:12:22,089 INFO L168 Benchmark]: RCFGBuilder took 595.68 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 48.2 MB in the beginning and 83.9 MB in the end (delta: -35.8 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-10-13 01:12:22,090 INFO L168 Benchmark]: TraceAbstraction took 13013.01 ms. Allocated memory is still 109.1 MB. Free memory was 86.8 MB in the beginning and 68.2 MB in the end (delta: 18.5 MB). Peak memory consumption was 60.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:12:22,090 INFO L168 Benchmark]: Witness Printer took 75.33 ms. Allocated memory is still 109.1 MB. Free memory was 68.2 MB in the beginning and 65.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:12:22,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory was 58.6 MB in the beginning and 58.6 MB in the end (delta: 25.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.45 ms. Allocated memory is still 90.2 MB. Free memory was 61.8 MB in the beginning and 51.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.54 ms. Allocated memory is still 90.2 MB. Free memory was 51.5 MB in the beginning and 49.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.37 ms. Allocated memory is still 90.2 MB. Free memory was 49.8 MB in the beginning and 48.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 595.68 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 48.2 MB in the beginning and 83.9 MB in the end (delta: -35.8 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13013.01 ms. Allocated memory is still 109.1 MB. Free memory was 86.8 MB in the beginning and 68.2 MB in the end (delta: 18.5 MB). Peak memory consumption was 60.1 MB. Max. memory is 16.1 GB. * Witness Printer took 75.33 ms. Allocated memory is still 109.1 MB. Free memory was 68.2 MB in the beginning and 65.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 55]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] struct cont cont; [L24] struct dummy dummy; [L25] struct dummy *dummies[10]; [L26] int a[10]; [L27] int i, *pa; [L28] i = __VERIFIER_nondet_int() [L29] int j = 0; [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND FALSE !(j < 10) [L36] COND TRUE i >= 0 && i < 9 [L37] a[i] = i [L38] dummy.array = &a[i] [L39] dummies[i + 1] = &dummy [L40] cont.array = &dummies[0] [L41] EXPR cont.array [L41] EXPR cont.array[i] [L41] EXPR cont.array[i]->array [L41] pa = &cont.array[i]->array[i] [L42] EXPR a[i] [L42] COND TRUE a[i] > 0 [L43] EXPR dummies[i + 1] [L43] EXPR dummies[i + 1]->array [L43] EXPR dummies[i + 1]->array[i] [L43] i = dummies[i + 1]->array[i] - 10 [L44] EXPR \read(*pa) [L44] COND FALSE !(i < *pa) [L18] EXPR pc->array [L18] EXPR pc->array[i] [L18] EXPR pc->array[i]->array [L18] EXPR pc->array[i]->array[i] [L18] return pc->array[i]->array[i] == i; [L47] COND TRUE !check(&cont, i) [L55] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12849.6ms, OverallIterations: 11, TraceHistogramMax: 10, EmptinessCheckTime: 21.3ms, AutomataDifference: 574.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 126 SDtfs, 55 SDslu, 266 SDs, 0 SdLazy, 167 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 325.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 363.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=10, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 66.0ms AutomataMinimizationTime, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 234.3ms SsaConstructionTime, 6819.8ms SatisfiabilityAnalysisTime, 1763.2ms InterpolantComputationTime, 419 NumberOfCodeBlocks, 419 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 369 ConstructedInterpolants, 0 QuantifiedInterpolants, 767 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1404 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 0/570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 01:12:22,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0964932f-9bf3-44c6-acc6-73faf6eafdad/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...