./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be --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 1ae3736aabcb020d122100864e41791456e1f94490735ab1a93eef5c54883fe7 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:02:52,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:02:52,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:02:52,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:02:52,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:02:52,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:02:52,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:02:52,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:02:52,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:02:52,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:02:52,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:02:52,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:02:52,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:02:52,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:02:52,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:02:52,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:02:52,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:02:52,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:02:52,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:02:52,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:02:52,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:02:52,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:02:52,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:02:52,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:02:52,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:02:52,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:02:52,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:02:52,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:02:52,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:02:52,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:02:52,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:02:52,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:02:52,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:02:52,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:02:52,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:02:52,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:02:52,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:02:52,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:02:52,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:02:52,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:02:52,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:02:52,593 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:02:52,646 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:02:52,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:02:52,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:02:52,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:02:52,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:02:52,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:02:52,655 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:02:52,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:02:52,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:02:52,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:02:52,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:02:52,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:02:52,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:02:52,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:02:52,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:02:52,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:02:52,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:02:52,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:02:52,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:02:52,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:02:52,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:02:52,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:02:52,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:02:52,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:02:52,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:02:52,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:02:52,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:02:52,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:02:52,662 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:02:52,664 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:02:52,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:02:52,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:02:52,665 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_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ae3736aabcb020d122100864e41791456e1f94490735ab1a93eef5c54883fe7 [2021-10-21 20:02:52,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:02:52,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:02:52,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:02:52,994 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:02:52,995 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:02:52,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2021-10-21 20:02:53,064 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/data/b0d242823/392325af881349c2a5e58ae29e552604/FLAG8c4022149 [2021-10-21 20:02:53,527 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:02:53,527 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2021-10-21 20:02:53,537 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/data/b0d242823/392325af881349c2a5e58ae29e552604/FLAG8c4022149 [2021-10-21 20:02:53,899 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/data/b0d242823/392325af881349c2a5e58ae29e552604 [2021-10-21 20:02:53,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:02:53,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:02:53,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:02:53,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:02:53,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:02:53,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:02:53" (1/1) ... [2021-10-21 20:02:53,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ef4904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:53, skipping insertion in model container [2021-10-21 20:02:53,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:02:53" (1/1) ... [2021-10-21 20:02:53,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:02:53,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:02:54,153 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_4a008a21-d65b-4dce-8435-deed691a1441/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2021-10-21 20:02:54,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:02:54,186 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:02:54,204 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_4a008a21-d65b-4dce-8435-deed691a1441/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2021-10-21 20:02:54,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:02:54,227 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:02:54,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54 WrapperNode [2021-10-21 20:02:54,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:02:54,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:02:54,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:02:54,230 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:02:54,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54" (1/1) ... [2021-10-21 20:02:54,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54" (1/1) ... [2021-10-21 20:02:54,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:02:54,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:02:54,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:02:54,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:02:54,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54" (1/1) ... [2021-10-21 20:02:54,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54" (1/1) ... [2021-10-21 20:02:54,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54" (1/1) ... [2021-10-21 20:02:54,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54" (1/1) ... [2021-10-21 20:02:54,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54" (1/1) ... [2021-10-21 20:02:54,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54" (1/1) ... [2021-10-21 20:02:54,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54" (1/1) ... [2021-10-21 20:02:54,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:02:54,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:02:54,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:02:54,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:02:54,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54" (1/1) ... [2021-10-21 20:02:54,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:02:54,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:02:54,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:02:54,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:02:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:02:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:02:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:02:54,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:02:54,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:02:54,765 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-21 20:02:54,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:02:54 BoogieIcfgContainer [2021-10-21 20:02:54,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:02:54,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:02:54,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:02:54,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:02:54,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:02:53" (1/3) ... [2021-10-21 20:02:54,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435c54f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:02:54, skipping insertion in model container [2021-10-21 20:02:54,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:02:54" (2/3) ... [2021-10-21 20:02:54,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435c54f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:02:54, skipping insertion in model container [2021-10-21 20:02:54,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:02:54" (3/3) ... [2021-10-21 20:02:54,804 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2021-10-21 20:02:54,810 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:02:54,811 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:02:54,867 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:02:54,874 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-10-21 20:02:54,875 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:02:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:54,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:02:54,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:54,902 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:54,902 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:54,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1745867070, now seen corresponding path program 1 times [2021-10-21 20:02:54,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:54,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088482410] [2021-10-21 20:02:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:54,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:55,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:55,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088482410] [2021-10-21 20:02:55,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088482410] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:55,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:55,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:02:55,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329132599] [2021-10-21 20:02:55,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:02:55,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:02:55,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:55,139 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 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 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:55,248 INFO L93 Difference]: Finished difference Result 52 states and 90 transitions. [2021-10-21 20:02:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:02:55,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-21 20:02:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:55,261 INFO L225 Difference]: With dead ends: 52 [2021-10-21 20:02:55,261 INFO L226 Difference]: Without dead ends: 25 [2021-10-21 20:02:55,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-21 20:02:55,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-21 20:02:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-10-21 20:02:55,292 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 23 [2021-10-21 20:02:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:55,292 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-21 20:02:55,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-10-21 20:02:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:02:55,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:55,294 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:55,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:02:55,294 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:55,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:55,296 INFO L82 PathProgramCache]: Analyzing trace with hash -936932661, now seen corresponding path program 1 times [2021-10-21 20:02:55,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:55,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709764364] [2021-10-21 20:02:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:55,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:55,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:55,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709764364] [2021-10-21 20:02:55,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709764364] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:55,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:55,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:55,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164489592] [2021-10-21 20:02:55,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:55,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:55,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:55,362 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2021-10-21 20:02:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:55,419 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2021-10-21 20:02:55,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:55,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-21 20:02:55,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:55,421 INFO L225 Difference]: With dead ends: 44 [2021-10-21 20:02:55,421 INFO L226 Difference]: Without dead ends: 25 [2021-10-21 20:02:55,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-21 20:02:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-21 20:02:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 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) [2021-10-21 20:02:55,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-10-21 20:02:55,429 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 23 [2021-10-21 20:02:55,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:55,429 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-10-21 20:02:55,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2021-10-21 20:02:55,430 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-10-21 20:02:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:02:55,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:55,431 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:55,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:02:55,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2008089875, now seen corresponding path program 1 times [2021-10-21 20:02:55,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:55,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359719990] [2021-10-21 20:02:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:55,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:55,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:55,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359719990] [2021-10-21 20:02:55,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359719990] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:55,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:55,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:02:55,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844470364] [2021-10-21 20:02:55,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:02:55,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:55,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:02:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:55,493 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:55,671 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2021-10-21 20:02:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:02:55,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-21 20:02:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:55,673 INFO L225 Difference]: With dead ends: 54 [2021-10-21 20:02:55,673 INFO L226 Difference]: Without dead ends: 39 [2021-10-21 20:02:55,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-21 20:02:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-21 20:02:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-10-21 20:02:55,683 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 23 [2021-10-21 20:02:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:55,683 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-10-21 20:02:55,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-10-21 20:02:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:02:55,685 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:55,685 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:55,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:02:55,686 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:55,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:55,687 INFO L82 PathProgramCache]: Analyzing trace with hash 635511084, now seen corresponding path program 1 times [2021-10-21 20:02:55,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:55,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040970570] [2021-10-21 20:02:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:55,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:55,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:55,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040970570] [2021-10-21 20:02:55,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040970570] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:55,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:55,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:02:55,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174448302] [2021-10-21 20:02:55,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:02:55,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:55,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:02:55,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:02:55,794 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:55,880 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-10-21 20:02:55,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:02:55,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-21 20:02:55,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:55,882 INFO L225 Difference]: With dead ends: 52 [2021-10-21 20:02:55,883 INFO L226 Difference]: Without dead ends: 35 [2021-10-21 20:02:55,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:02:55,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-21 20:02:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-21 20:02:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-10-21 20:02:55,893 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 23 [2021-10-21 20:02:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:55,893 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-10-21 20:02:55,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:55,894 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-10-21 20:02:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:02:55,895 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:55,895 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:55,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:02:55,895 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:55,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:55,896 INFO L82 PathProgramCache]: Analyzing trace with hash 602818777, now seen corresponding path program 1 times [2021-10-21 20:02:55,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:55,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734965340] [2021-10-21 20:02:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:55,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:56,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:56,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734965340] [2021-10-21 20:02:56,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734965340] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:56,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:56,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 20:02:56,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518297557] [2021-10-21 20:02:56,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:02:56,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:02:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:02:56,070 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-10-21 20:02:56,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:56,166 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-10-21 20:02:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:02:56,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-10-21 20:02:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:56,169 INFO L225 Difference]: With dead ends: 44 [2021-10-21 20:02:56,169 INFO L226 Difference]: Without dead ends: 31 [2021-10-21 20:02:56,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:02:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-21 20:02:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-21 20:02:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-10-21 20:02:56,186 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2021-10-21 20:02:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:56,187 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-10-21 20:02:56,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-10-21 20:02:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:02:56,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:56,189 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:56,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 20:02:56,190 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:56,191 INFO L82 PathProgramCache]: Analyzing trace with hash -218545361, now seen corresponding path program 1 times [2021-10-21 20:02:56,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:56,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855378265] [2021-10-21 20:02:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:56,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:56,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:56,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855378265] [2021-10-21 20:02:56,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855378265] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:56,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:56,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:02:56,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786555200] [2021-10-21 20:02:56,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:02:56,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:56,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:02:56,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:56,286 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:56,353 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-10-21 20:02:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:02:56,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-21 20:02:56,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:56,364 INFO L225 Difference]: With dead ends: 34 [2021-10-21 20:02:56,366 INFO L226 Difference]: Without dead ends: 31 [2021-10-21 20:02:56,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-21 20:02:56,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-21 20:02:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-10-21 20:02:56,377 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2021-10-21 20:02:56,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:56,378 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-10-21 20:02:56,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:56,378 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-10-21 20:02:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:02:56,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:56,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:56,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 20:02:56,381 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:56,382 INFO L82 PathProgramCache]: Analyzing trace with hash -217919750, now seen corresponding path program 1 times [2021-10-21 20:02:56,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:56,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727907187] [2021-10-21 20:02:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:56,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:56,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:56,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727907187] [2021-10-21 20:02:56,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727907187] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:56,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:56,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-21 20:02:56,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080395799] [2021-10-21 20:02:56,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:02:56,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:56,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:02:56,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:02:56,544 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2021-10-21 20:02:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:56,617 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-10-21 20:02:56,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:02:56,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-21 20:02:56,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:56,621 INFO L225 Difference]: With dead ends: 36 [2021-10-21 20:02:56,622 INFO L226 Difference]: Without dead ends: 27 [2021-10-21 20:02:56,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:02:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-21 20:02:56,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-21 20:02:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 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) [2021-10-21 20:02:56,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-21 20:02:56,645 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2021-10-21 20:02:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:56,646 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-21 20:02:56,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2021-10-21 20:02:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-21 20:02:56,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 20:02:56,648 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:56,648 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:56,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 20:02:56,649 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash 423767145, now seen corresponding path program 1 times [2021-10-21 20:02:56,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:56,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109938748] [2021-10-21 20:02:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:56,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:56,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:56,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109938748] [2021-10-21 20:02:56,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109938748] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:56,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:56,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-21 20:02:56,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159081355] [2021-10-21 20:02:56,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 20:02:56,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:56,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:02:56,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:02:56,806 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-10-21 20:02:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:56,865 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-10-21 20:02:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:02:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-21 20:02:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:56,867 INFO L225 Difference]: With dead ends: 34 [2021-10-21 20:02:56,867 INFO L226 Difference]: Without dead ends: 29 [2021-10-21 20:02:56,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:02:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-21 20:02:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-21 20:02:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) [2021-10-21 20:02:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-10-21 20:02:56,872 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2021-10-21 20:02:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:56,872 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-10-21 20:02:56,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-10-21 20:02:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-10-21 20:02:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:02:56,873 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:56,874 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:56,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 20:02:56,874 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash -875092666, now seen corresponding path program 1 times [2021-10-21 20:02:56,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:56,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868833689] [2021-10-21 20:02:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:56,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:57,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:57,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868833689] [2021-10-21 20:02:57,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868833689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:02:57,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468239043] [2021-10-21 20:02:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:57,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:02:57,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:02:57,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:02:57,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:02:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:57,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 20:02:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:02:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:57,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468239043] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:02:57,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:02:57,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-21 20:02:57,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931744580] [2021-10-21 20:02:57,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 20:02:57,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 20:02:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:02:57,269 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:57,376 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-10-21 20:02:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:02:57,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-21 20:02:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:57,378 INFO L225 Difference]: With dead ends: 36 [2021-10-21 20:02:57,378 INFO L226 Difference]: Without dead ends: 31 [2021-10-21 20:02:57,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:02:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-21 20:02:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-21 20:02:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 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) [2021-10-21 20:02:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-10-21 20:02:57,383 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2021-10-21 20:02:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:57,384 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-10-21 20:02:57,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-10-21 20:02:57,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 20:02:57,385 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:57,386 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:57,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:02:57,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:02:57,606 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:57,606 INFO L82 PathProgramCache]: Analyzing trace with hash 756112099, now seen corresponding path program 2 times [2021-10-21 20:02:57,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:57,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772450908] [2021-10-21 20:02:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:57,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:57,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:57,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772450908] [2021-10-21 20:02:57,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772450908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:02:57,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624331075] [2021-10-21 20:02:57,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:02:57,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:02:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:02:57,822 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:02:57,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:02:57,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:02:57,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:02:57,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 20:02:57,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:02:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:58,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624331075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:02:58,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:02:58,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-21 20:02:58,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836882868] [2021-10-21 20:02:58,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 20:02:58,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:58,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 20:02:58,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:02:58,049 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2021-10-21 20:02:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:58,118 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-10-21 20:02:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 20:02:58,119 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 [2021-10-21 20:02:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:58,120 INFO L225 Difference]: With dead ends: 38 [2021-10-21 20:02:58,120 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 20:02:58,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:02:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 20:02:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-21 20:02:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-21 20:02:58,129 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2021-10-21 20:02:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:58,130 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-21 20:02:58,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2021-10-21 20:02:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-21 20:02:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 20:02:58,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:58,135 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:58,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-21 20:02:58,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 20:02:58,353 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:58,353 INFO L82 PathProgramCache]: Analyzing trace with hash 680828224, now seen corresponding path program 3 times [2021-10-21 20:02:58,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:58,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021856908] [2021-10-21 20:02:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:58,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:58,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:58,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021856908] [2021-10-21 20:02:58,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021856908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:02:58,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835606401] [2021-10-21 20:02:58,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:02:58,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:02:58,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:02:58,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:02:58,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:02:58,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 20:02:58,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:02:58,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:02:58,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:02:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:02:58,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835606401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:02:58,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:02:58,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4] total 17 [2021-10-21 20:02:58,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215730066] [2021-10-21 20:02:58,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 20:02:58,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 20:02:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:02:58,723 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:58,806 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-10-21 20:02:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 20:02:58,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-21 20:02:58,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:58,810 INFO L225 Difference]: With dead ends: 42 [2021-10-21 20:02:58,810 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 20:02:58,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:02:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 20:02:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-10-21 20:02:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-21 20:02:58,820 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2021-10-21 20:02:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:58,821 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-21 20:02:58,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:58,821 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-21 20:02:58,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 20:02:58,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:58,824 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:58,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:02:59,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:02:59,045 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:59,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2124419607, now seen corresponding path program 4 times [2021-10-21 20:02:59,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:59,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409017622] [2021-10-21 20:02:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:59,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:02:59,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:59,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409017622] [2021-10-21 20:02:59,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409017622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:02:59,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143204545] [2021-10-21 20:02:59,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:02:59,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:02:59,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:02:59,217 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:02:59,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:02:59,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:02:59,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:02:59,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 20:02:59,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:02:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:02:59,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143204545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:02:59,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:02:59,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-21 20:02:59,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401084043] [2021-10-21 20:02:59,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 20:02:59,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:59,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 20:02:59,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:02:59,438 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:59,509 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-10-21 20:02:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 20:02:59,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-21 20:02:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:59,510 INFO L225 Difference]: With dead ends: 44 [2021-10-21 20:02:59,510 INFO L226 Difference]: Without dead ends: 38 [2021-10-21 20:02:59,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:02:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-21 20:02:59,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-21 20:02:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:59,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-21 20:02:59,515 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-10-21 20:02:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:59,515 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-21 20:02:59,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-21 20:02:59,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:02:59,516 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:59,517 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:59,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:02:59,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 20:02:59,741 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:59,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:59,742 INFO L82 PathProgramCache]: Analyzing trace with hash 516774580, now seen corresponding path program 5 times [2021-10-21 20:02:59,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:59,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211185934] [2021-10-21 20:02:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:59,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:02:59,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:59,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211185934] [2021-10-21 20:02:59,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211185934] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:02:59,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483488593] [2021-10-21 20:02:59,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:02:59,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:02:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:02:59,924 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:02:59,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 20:03:00,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-21 20:03:00,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:00,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:03:00,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 20:03:00,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483488593] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:00,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:00,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2021-10-21 20:03:00,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556082137] [2021-10-21 20:03:00,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 20:03:00,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:00,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 20:03:00,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-21 20:03:00,214 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:00,311 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-10-21 20:03:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 20:03:00,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-21 20:03:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:00,314 INFO L225 Difference]: With dead ends: 51 [2021-10-21 20:03:00,314 INFO L226 Difference]: Without dead ends: 45 [2021-10-21 20:03:00,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-21 20:03:00,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-21 20:03:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-10-21 20:03:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-10-21 20:03:00,330 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2021-10-21 20:03:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:00,330 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-10-21 20:03:00,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-10-21 20:03:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 20:03:00,332 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:00,332 INFO L512 BasicCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:00,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:00,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 20:03:00,546 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:00,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2055346949, now seen corresponding path program 6 times [2021-10-21 20:03:00,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:00,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847851030] [2021-10-21 20:03:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:00,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 20:03:00,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:00,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847851030] [2021-10-21 20:03:00,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847851030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:00,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640884546] [2021-10-21 20:03:00,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:03:00,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:00,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:00,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 20:03:00,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-21 20:03:00,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 20:03:00,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 20:03:01,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640884546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:01,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:01,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-21 20:03:01,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839775613] [2021-10-21 20:03:01,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 20:03:01,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:01,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 20:03:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:03:01,028 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:01,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:01,118 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-10-21 20:03:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 20:03:01,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-21 20:03:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:01,120 INFO L225 Difference]: With dead ends: 56 [2021-10-21 20:03:01,120 INFO L226 Difference]: Without dead ends: 46 [2021-10-21 20:03:01,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:03:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-21 20:03:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-21 20:03:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-10-21 20:03:01,126 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2021-10-21 20:03:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:01,126 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-10-21 20:03:01,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-10-21 20:03:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 20:03:01,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:01,128 INFO L512 BasicCegarLoop]: trace histogram [11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:01,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:01,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 20:03:01,342 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:01,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:01,342 INFO L82 PathProgramCache]: Analyzing trace with hash -891324766, now seen corresponding path program 7 times [2021-10-21 20:03:01,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:01,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920510477] [2021-10-21 20:03:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:01,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 20:03:01,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:01,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920510477] [2021-10-21 20:03:01,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920510477] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:01,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181325848] [2021-10-21 20:03:01,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:03:01,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:01,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:01,591 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:01,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 20:03:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:01,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 20:03:01,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 20:03:01,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181325848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:01,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:01,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-21 20:03:01,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097869093] [2021-10-21 20:03:01,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 20:03:01,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 20:03:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-21 20:03:01,897 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:01,972 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-10-21 20:03:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 20:03:01,973 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-21 20:03:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:01,974 INFO L225 Difference]: With dead ends: 58 [2021-10-21 20:03:01,974 INFO L226 Difference]: Without dead ends: 48 [2021-10-21 20:03:01,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-21 20:03:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-21 20:03:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-21 20:03:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-21 20:03:01,989 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2021-10-21 20:03:01,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:01,989 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-21 20:03:01,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:01,990 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-21 20:03:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 20:03:01,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:01,995 INFO L512 BasicCegarLoop]: trace histogram [12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:02,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:02,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 20:03:02,222 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:02,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:02,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2035572479, now seen corresponding path program 8 times [2021-10-21 20:03:02,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:02,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451317010] [2021-10-21 20:03:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:02,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 20:03:02,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:02,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451317010] [2021-10-21 20:03:02,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451317010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:02,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477934294] [2021-10-21 20:03:02,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:03:02,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:02,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:02,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:02,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 20:03:02,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:03:02,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:03:02,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-21 20:03:02,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477934294] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:02,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:02,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-10-21 20:03:02,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743260046] [2021-10-21 20:03:02,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 20:03:02,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:02,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 20:03:02,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-21 20:03:02,920 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:03,026 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-10-21 20:03:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 20:03:03,026 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-21 20:03:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:03,027 INFO L225 Difference]: With dead ends: 65 [2021-10-21 20:03:03,027 INFO L226 Difference]: Without dead ends: 55 [2021-10-21 20:03:03,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-21 20:03:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-21 20:03:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-10-21 20:03:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-21 20:03:03,032 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 47 [2021-10-21 20:03:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:03,032 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-21 20:03:03,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-21 20:03:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 20:03:03,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:03,034 INFO L512 BasicCegarLoop]: trace histogram [15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:03,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:03,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:03,251 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:03,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:03,251 INFO L82 PathProgramCache]: Analyzing trace with hash 512283024, now seen corresponding path program 9 times [2021-10-21 20:03:03,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:03,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715217759] [2021-10-21 20:03:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:03,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 20:03:03,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:03,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715217759] [2021-10-21 20:03:03,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715217759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:03,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913264525] [2021-10-21 20:03:03,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:03:03,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:03,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:03,495 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:03,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 20:03:03,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-10-21 20:03:03,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:03,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 20:03:03,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-21 20:03:03,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913264525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:03,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:03,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2021-10-21 20:03:03,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400033783] [2021-10-21 20:03:03,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 20:03:03,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:03,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 20:03:03,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-21 20:03:03,948 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 28 states, 28 states have (on average 2.857142857142857) internal successors, (80), 28 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:04,089 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-10-21 20:03:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 20:03:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.857142857142857) internal successors, (80), 28 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-10-21 20:03:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:04,090 INFO L225 Difference]: With dead ends: 73 [2021-10-21 20:03:04,091 INFO L226 Difference]: Without dead ends: 59 [2021-10-21 20:03:04,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-21 20:03:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-21 20:03:04,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-10-21 20:03:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-10-21 20:03:04,095 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2021-10-21 20:03:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:04,096 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-10-21 20:03:04,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.857142857142857) internal successors, (80), 28 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:04,097 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-10-21 20:03:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-21 20:03:04,097 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:04,098 INFO L512 BasicCegarLoop]: trace histogram [17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:04,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:04,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 20:03:04,306 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:04,306 INFO L82 PathProgramCache]: Analyzing trace with hash 632258215, now seen corresponding path program 10 times [2021-10-21 20:03:04,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:04,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282625989] [2021-10-21 20:03:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:04,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-21 20:03:04,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:04,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282625989] [2021-10-21 20:03:04,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282625989] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:04,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988177538] [2021-10-21 20:03:04,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:03:04,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:04,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:04,586 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:04,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 20:03:04,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:03:04,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:04,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 20:03:04,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-21 20:03:05,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988177538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:05,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:05,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-21 20:03:05,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908598804] [2021-10-21 20:03:05,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 20:03:05,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:05,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 20:03:05,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-21 20:03:05,006 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:05,108 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-10-21 20:03:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 20:03:05,109 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-10-21 20:03:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:05,110 INFO L225 Difference]: With dead ends: 76 [2021-10-21 20:03:05,110 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 20:03:05,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-21 20:03:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 20:03:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-21 20:03:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-10-21 20:03:05,118 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2021-10-21 20:03:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:05,119 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-10-21 20:03:05,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-10-21 20:03:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 20:03:05,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:05,121 INFO L512 BasicCegarLoop]: trace histogram [18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:05,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:05,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 20:03:05,350 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:05,350 INFO L82 PathProgramCache]: Analyzing trace with hash 698467204, now seen corresponding path program 11 times [2021-10-21 20:03:05,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:05,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994766313] [2021-10-21 20:03:05,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:05,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-21 20:03:05,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:05,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994766313] [2021-10-21 20:03:05,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994766313] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:05,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041345314] [2021-10-21 20:03:05,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:03:05,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:05,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:05,690 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:05,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 20:03:05,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-10-21 20:03:05,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:05,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 20:03:05,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-21 20:03:06,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041345314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:06,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:06,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-10-21 20:03:06,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488740821] [2021-10-21 20:03:06,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 20:03:06,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:06,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 20:03:06,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 20:03:06,319 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:06,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:06,467 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-10-21 20:03:06,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-21 20:03:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-21 20:03:06,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:06,469 INFO L225 Difference]: With dead ends: 85 [2021-10-21 20:03:06,469 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 20:03:06,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 488.7ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 20:03:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 20:03:06,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-10-21 20:03:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:06,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-10-21 20:03:06,474 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 59 [2021-10-21 20:03:06,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:06,475 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-10-21 20:03:06,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:06,475 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-10-21 20:03:06,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-21 20:03:06,476 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:06,476 INFO L512 BasicCegarLoop]: trace histogram [22, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:06,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:06,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:06,702 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:06,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:06,702 INFO L82 PathProgramCache]: Analyzing trace with hash -821055537, now seen corresponding path program 12 times [2021-10-21 20:03:06,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:06,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507825042] [2021-10-21 20:03:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:06,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 247 proven. 156 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-21 20:03:07,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:07,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507825042] [2021-10-21 20:03:07,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507825042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:07,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391434123] [2021-10-21 20:03:07,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:03:07,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:07,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:07,035 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:07,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 20:03:07,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-10-21 20:03:07,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:07,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:03:07,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 247 proven. 156 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-21 20:03:07,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391434123] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:07,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:07,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-21 20:03:07,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356305831] [2021-10-21 20:03:07,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 20:03:07,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 20:03:07,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-21 20:03:07,479 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:07,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:07,590 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-10-21 20:03:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 20:03:07,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-10-21 20:03:07,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:07,593 INFO L225 Difference]: With dead ends: 92 [2021-10-21 20:03:07,593 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 20:03:07,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-21 20:03:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 20:03:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-21 20:03:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-10-21 20:03:07,598 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2021-10-21 20:03:07,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:07,598 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-10-21 20:03:07,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-10-21 20:03:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-21 20:03:07,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:07,600 INFO L512 BasicCegarLoop]: trace histogram [23, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:07,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:07,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:07,821 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:07,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:07,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1433093228, now seen corresponding path program 13 times [2021-10-21 20:03:07,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:07,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089106443] [2021-10-21 20:03:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:07,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-21 20:03:08,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:08,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089106443] [2021-10-21 20:03:08,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089106443] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:08,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348994698] [2021-10-21 20:03:08,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:03:08,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:08,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:08,152 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:08,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 20:03:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:08,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 20:03:08,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-21 20:03:08,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348994698] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:08,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:08,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-10-21 20:03:08,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444022289] [2021-10-21 20:03:08,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 20:03:08,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 20:03:08,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-21 20:03:08,607 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:08,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:08,716 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-10-21 20:03:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 20:03:08,717 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-10-21 20:03:08,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:08,718 INFO L225 Difference]: With dead ends: 94 [2021-10-21 20:03:08,718 INFO L226 Difference]: Without dead ends: 72 [2021-10-21 20:03:08,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-21 20:03:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-21 20:03:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-21 20:03:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-10-21 20:03:08,753 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2021-10-21 20:03:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:08,753 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-10-21 20:03:08,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-10-21 20:03:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-21 20:03:08,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:08,754 INFO L512 BasicCegarLoop]: trace histogram [24, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:08,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:08,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:08,954 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:08,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:08,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1288428087, now seen corresponding path program 14 times [2021-10-21 20:03:08,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:08,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358300459] [2021-10-21 20:03:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:08,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-21 20:03:09,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:09,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358300459] [2021-10-21 20:03:09,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358300459] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:09,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587779722] [2021-10-21 20:03:09,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:03:09,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:09,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:09,290 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:09,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 20:03:09,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:03:09,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:09,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 20:03:09,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-21 20:03:09,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587779722] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:09,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:09,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-21 20:03:09,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93557277] [2021-10-21 20:03:09,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-21 20:03:09,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:09,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-21 20:03:09,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-21 20:03:09,834 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:09,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:09,943 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-10-21 20:03:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 20:03:09,944 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-10-21 20:03:09,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:09,945 INFO L225 Difference]: With dead ends: 96 [2021-10-21 20:03:09,945 INFO L226 Difference]: Without dead ends: 74 [2021-10-21 20:03:09,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-21 20:03:09,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-21 20:03:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-21 20:03:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-10-21 20:03:09,955 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2021-10-21 20:03:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:09,955 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-10-21 20:03:09,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-10-21 20:03:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-21 20:03:09,956 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:09,957 INFO L512 BasicCegarLoop]: trace histogram [25, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:09,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:10,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:10,173 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1035328538, now seen corresponding path program 15 times [2021-10-21 20:03:10,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:10,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616143326] [2021-10-21 20:03:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:10,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 304 proven. 240 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-10-21 20:03:10,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:10,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616143326] [2021-10-21 20:03:10,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616143326] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:10,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454737715] [2021-10-21 20:03:10,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:03:10,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:10,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:10,507 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:10,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 20:03:10,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-10-21 20:03:10,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:10,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 20:03:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 315 proven. 100 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-10-21 20:03:11,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454737715] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:11,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:11,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2021-10-21 20:03:11,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806668500] [2021-10-21 20:03:11,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 20:03:11,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:11,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 20:03:11,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 20:03:11,396 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:11,556 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-10-21 20:03:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-21 20:03:11,557 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 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 73 [2021-10-21 20:03:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:11,558 INFO L225 Difference]: With dead ends: 101 [2021-10-21 20:03:11,558 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 20:03:11,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 546.1ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 20:03:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 20:03:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-10-21 20:03:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-10-21 20:03:11,563 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2021-10-21 20:03:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:11,563 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-10-21 20:03:11,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-10-21 20:03:11,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-21 20:03:11,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:11,565 INFO L512 BasicCegarLoop]: trace histogram [27, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:11,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:11,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:11,776 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:11,777 INFO L82 PathProgramCache]: Analyzing trace with hash -782408963, now seen corresponding path program 16 times [2021-10-21 20:03:11,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:11,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243239553] [2021-10-21 20:03:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:11,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-21 20:03:12,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:12,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243239553] [2021-10-21 20:03:12,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243239553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:12,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972468394] [2021-10-21 20:03:12,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:03:12,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:12,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:12,202 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:12,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 20:03:12,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:03:12,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:12,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 20:03:12,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-21 20:03:12,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972468394] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:12,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:12,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-10-21 20:03:12,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244021131] [2021-10-21 20:03:12,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 20:03:12,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:12,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 20:03:12,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-21 20:03:12,747 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:12,869 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2021-10-21 20:03:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 20:03:12,869 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-21 20:03:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:12,871 INFO L225 Difference]: With dead ends: 104 [2021-10-21 20:03:12,871 INFO L226 Difference]: Without dead ends: 80 [2021-10-21 20:03:12,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-21 20:03:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-21 20:03:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-21 20:03:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-10-21 20:03:12,878 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2021-10-21 20:03:12,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:12,878 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-10-21 20:03:12,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-10-21 20:03:12,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-21 20:03:12,880 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:12,880 INFO L512 BasicCegarLoop]: trace histogram [28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:12,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:13,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:13,102 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash -376334502, now seen corresponding path program 17 times [2021-10-21 20:03:13,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:13,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114652434] [2021-10-21 20:03:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:13,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 378 proven. 306 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-21 20:03:13,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:13,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114652434] [2021-10-21 20:03:13,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114652434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:13,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085365645] [2021-10-21 20:03:13,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:03:13,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:13,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:13,554 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:13,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 20:03:13,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-10-21 20:03:13,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:13,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 20:03:13,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 405 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-10-21 20:03:14,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085365645] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:14,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:14,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16] total 43 [2021-10-21 20:03:14,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282938697] [2021-10-21 20:03:14,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-21 20:03:14,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:14,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-21 20:03:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 20:03:14,547 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 43 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:14,750 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-10-21 20:03:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-21 20:03:14,751 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 43 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-10-21 20:03:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:14,752 INFO L225 Difference]: With dead ends: 113 [2021-10-21 20:03:14,752 INFO L226 Difference]: Without dead ends: 89 [2021-10-21 20:03:14,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 782.3ms TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 20:03:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-21 20:03:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-10-21 20:03:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-10-21 20:03:14,761 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 79 [2021-10-21 20:03:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:14,762 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-10-21 20:03:14,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 43 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-10-21 20:03:14,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-21 20:03:14,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:14,764 INFO L512 BasicCegarLoop]: trace histogram [32, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:14,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:14,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 20:03:14,978 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:14,978 INFO L82 PathProgramCache]: Analyzing trace with hash -467322203, now seen corresponding path program 18 times [2021-10-21 20:03:14,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:14,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482984078] [2021-10-21 20:03:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:14,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 513 proven. 342 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-21 20:03:15,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:15,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482984078] [2021-10-21 20:03:15,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482984078] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:15,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578741305] [2021-10-21 20:03:15,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:03:15,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:15,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:15,436 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:15,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 20:03:15,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-10-21 20:03:15,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:15,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 20:03:15,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 256 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-10-21 20:03:16,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578741305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:16,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:16,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19] total 47 [2021-10-21 20:03:16,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532700727] [2021-10-21 20:03:16,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-21 20:03:16,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-21 20:03:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-21 20:03:16,783 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 47 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 47 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:16,992 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2021-10-21 20:03:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-21 20:03:16,993 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 47 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-10-21 20:03:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:16,994 INFO L225 Difference]: With dead ends: 127 [2021-10-21 20:03:16,994 INFO L226 Difference]: Without dead ends: 97 [2021-10-21 20:03:16,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 955.2ms TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-21 20:03:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-21 20:03:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-10-21 20:03:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-10-21 20:03:16,999 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 87 [2021-10-21 20:03:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:17,000 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-10-21 20:03:17,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 47 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-10-21 20:03:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-21 20:03:17,001 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:17,001 INFO L512 BasicCegarLoop]: trace histogram [36, 19, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:17,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:17,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 20:03:17,218 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash 319507632, now seen corresponding path program 19 times [2021-10-21 20:03:17,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:17,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834788025] [2021-10-21 20:03:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:17,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 660 proven. 380 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-10-21 20:03:17,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:17,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834788025] [2021-10-21 20:03:17,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834788025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:17,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595397691] [2021-10-21 20:03:17,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:03:17,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:17,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:17,658 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:17,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 20:03:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 20:03:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 660 proven. 380 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-10-21 20:03:18,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595397691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:18,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:18,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-10-21 20:03:18,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016857931] [2021-10-21 20:03:18,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-21 20:03:18,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:18,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-21 20:03:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-21 20:03:18,292 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:18,384 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2021-10-21 20:03:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-21 20:03:18,385 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-10-21 20:03:18,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:18,386 INFO L225 Difference]: With dead ends: 134 [2021-10-21 20:03:18,386 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 20:03:18,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-21 20:03:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 20:03:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-21 20:03:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-10-21 20:03:18,391 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2021-10-21 20:03:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:18,392 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-10-21 20:03:18,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-10-21 20:03:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-21 20:03:18,393 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:18,393 INFO L512 BasicCegarLoop]: trace histogram [37, 20, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:18,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:18,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:18,621 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:18,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1493173197, now seen corresponding path program 20 times [2021-10-21 20:03:18,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:18,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568733277] [2021-10-21 20:03:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:18,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-10-21 20:03:19,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:19,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568733277] [2021-10-21 20:03:19,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568733277] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:19,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451349694] [2021-10-21 20:03:19,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:03:19,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:19,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:19,116 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:19,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 20:03:19,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:03:19,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:19,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 20:03:19,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-10-21 20:03:19,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451349694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:19,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:19,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-10-21 20:03:19,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456763514] [2021-10-21 20:03:19,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 20:03:19,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 20:03:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 20:03:19,885 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:20,013 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2021-10-21 20:03:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 20:03:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-10-21 20:03:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:20,015 INFO L225 Difference]: With dead ends: 136 [2021-10-21 20:03:20,015 INFO L226 Difference]: Without dead ends: 100 [2021-10-21 20:03:20,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 20:03:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-21 20:03:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-21 20:03:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-10-21 20:03:20,021 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2021-10-21 20:03:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:20,022 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-10-21 20:03:20,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-10-21 20:03:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-21 20:03:20,023 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:20,023 INFO L512 BasicCegarLoop]: trace histogram [38, 21, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:20,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:20,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 20:03:20,237 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:20,238 INFO L82 PathProgramCache]: Analyzing trace with hash -190617686, now seen corresponding path program 21 times [2021-10-21 20:03:20,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:20,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551920361] [2021-10-21 20:03:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:20,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 726 proven. 462 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-10-21 20:03:20,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:20,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551920361] [2021-10-21 20:03:20,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551920361] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:20,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132910915] [2021-10-21 20:03:20,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:03:20,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:20,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:20,722 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:20,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 20:03:21,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-10-21 20:03:21,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:21,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 20:03:21,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 735 proven. 289 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-10-21 20:03:21,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132910915] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:21,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:21,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20] total 51 [2021-10-21 20:03:21,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754293491] [2021-10-21 20:03:21,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 20:03:21,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:21,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 20:03:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 20:03:21,961 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 51 states, 51 states have (on average 2.4705882352941178) internal successors, (126), 51 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:22,195 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2021-10-21 20:03:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-21 20:03:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.4705882352941178) internal successors, (126), 51 states have internal predecessors, (126), 0 states have call successors, (0), 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 99 [2021-10-21 20:03:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:22,196 INFO L225 Difference]: With dead ends: 141 [2021-10-21 20:03:22,196 INFO L226 Difference]: Without dead ends: 105 [2021-10-21 20:03:22,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 900.7ms TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 20:03:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-21 20:03:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-10-21 20:03:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-10-21 20:03:22,208 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2021-10-21 20:03:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:22,208 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-10-21 20:03:22,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.4705882352941178) internal successors, (126), 51 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-10-21 20:03:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-21 20:03:22,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:22,211 INFO L512 BasicCegarLoop]: trace histogram [40, 22, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:22,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:22,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 20:03:22,418 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:22,418 INFO L82 PathProgramCache]: Analyzing trace with hash -363246719, now seen corresponding path program 22 times [2021-10-21 20:03:22,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:22,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179017873] [2021-10-21 20:03:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:22,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 805 proven. 506 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-10-21 20:03:22,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:22,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179017873] [2021-10-21 20:03:22,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179017873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:22,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123702786] [2021-10-21 20:03:22,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:03:22,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:22,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:22,954 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:22,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 20:03:23,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:03:23,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:23,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 20:03:23,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 805 proven. 506 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-10-21 20:03:23,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123702786] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:23,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:23,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-10-21 20:03:23,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862557876] [2021-10-21 20:03:23,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 20:03:23,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:23,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 20:03:23,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 20:03:23,651 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:23,772 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2021-10-21 20:03:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 20:03:23,773 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-10-21 20:03:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:23,773 INFO L225 Difference]: With dead ends: 144 [2021-10-21 20:03:23,774 INFO L226 Difference]: Without dead ends: 106 [2021-10-21 20:03:23,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 20:03:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-21 20:03:23,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-21 20:03:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-10-21 20:03:23,780 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2021-10-21 20:03:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:23,781 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-10-21 20:03:23,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-10-21 20:03:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-21 20:03:23,783 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:23,783 INFO L512 BasicCegarLoop]: trace histogram [41, 23, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:23,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:23,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:23,993 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:23,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:23,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1285057122, now seen corresponding path program 23 times [2021-10-21 20:03:23,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:23,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041363426] [2021-10-21 20:03:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:23,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 840 proven. 552 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-10-21 20:03:24,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:24,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041363426] [2021-10-21 20:03:24,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041363426] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:24,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629737096] [2021-10-21 20:03:24,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:03:24,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:24,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:24,513 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:24,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 20:03:24,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-10-21 20:03:25,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:25,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:03:25,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 400 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-10-21 20:03:25,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629737096] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:25,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:25,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 23] total 56 [2021-10-21 20:03:25,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663006800] [2021-10-21 20:03:25,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-21 20:03:25,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-21 20:03:25,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 20:03:25,889 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 56 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 56 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:26,077 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-10-21 20:03:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-21 20:03:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 56 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-21 20:03:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:26,078 INFO L225 Difference]: With dead ends: 153 [2021-10-21 20:03:26,079 INFO L226 Difference]: Without dead ends: 115 [2021-10-21 20:03:26,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1056.6ms TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 20:03:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-21 20:03:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-10-21 20:03:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-10-21 20:03:26,086 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 105 [2021-10-21 20:03:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:26,086 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-10-21 20:03:26,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 56 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-10-21 20:03:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-21 20:03:26,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:26,088 INFO L512 BasicCegarLoop]: trace histogram [45, 24, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:26,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:26,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:26,314 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:26,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:26,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1116419159, now seen corresponding path program 24 times [2021-10-21 20:03:26,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:26,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430480734] [2021-10-21 20:03:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:26,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1025 proven. 600 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-21 20:03:26,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:26,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430480734] [2021-10-21 20:03:26,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430480734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:26,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758396679] [2021-10-21 20:03:26,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:03:26,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:26,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:26,945 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:26,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 20:03:27,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2021-10-21 20:03:27,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:27,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 20:03:27,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1025 proven. 600 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-21 20:03:27,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758396679] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:27,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:27,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-10-21 20:03:27,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038701828] [2021-10-21 20:03:27,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-21 20:03:27,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:27,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-21 20:03:27,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 20:03:27,767 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:27,902 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2021-10-21 20:03:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-21 20:03:27,903 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 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 113 [2021-10-21 20:03:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:27,904 INFO L225 Difference]: With dead ends: 160 [2021-10-21 20:03:27,904 INFO L226 Difference]: Without dead ends: 116 [2021-10-21 20:03:27,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 20:03:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-21 20:03:27,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-10-21 20:03:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2021-10-21 20:03:27,910 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2021-10-21 20:03:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:27,910 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2021-10-21 20:03:27,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2021-10-21 20:03:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-21 20:03:27,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:27,912 INFO L512 BasicCegarLoop]: trace histogram [46, 25, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:27,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:28,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:28,138 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:28,138 INFO L82 PathProgramCache]: Analyzing trace with hash 110548358, now seen corresponding path program 25 times [2021-10-21 20:03:28,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:28,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875482747] [2021-10-21 20:03:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:28,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-21 20:03:28,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:28,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875482747] [2021-10-21 20:03:28,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875482747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:28,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627237926] [2021-10-21 20:03:28,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:03:28,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:28,793 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:28,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 20:03:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:29,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-21 20:03:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-21 20:03:29,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627237926] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:29,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:29,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-10-21 20:03:29,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601656687] [2021-10-21 20:03:29,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 20:03:29,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:29,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 20:03:29,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 20:03:29,595 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:29,710 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2021-10-21 20:03:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-21 20:03:29,722 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-10-21 20:03:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:29,723 INFO L225 Difference]: With dead ends: 162 [2021-10-21 20:03:29,723 INFO L226 Difference]: Without dead ends: 118 [2021-10-21 20:03:29,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 539.0ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 20:03:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-21 20:03:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-10-21 20:03:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2021-10-21 20:03:29,746 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2021-10-21 20:03:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:29,746 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2021-10-21 20:03:29,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2021-10-21 20:03:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-21 20:03:29,748 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:29,748 INFO L512 BasicCegarLoop]: trace histogram [47, 26, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:29,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:29,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 20:03:29,973 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:29,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1889674205, now seen corresponding path program 26 times [2021-10-21 20:03:29,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:29,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528255852] [2021-10-21 20:03:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:29,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1107 proven. 702 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-21 20:03:30,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:30,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528255852] [2021-10-21 20:03:30,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528255852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:30,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151377104] [2021-10-21 20:03:30,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:03:30,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:30,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:30,576 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:30,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 20:03:31,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:03:31,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:31,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-21 20:03:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1107 proven. 702 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-21 20:03:31,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151377104] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:31,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:31,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-10-21 20:03:31,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15135980] [2021-10-21 20:03:31,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-21 20:03:31,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:31,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-21 20:03:31,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 20:03:31,478 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:31,575 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2021-10-21 20:03:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-21 20:03:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-10-21 20:03:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:31,576 INFO L225 Difference]: With dead ends: 164 [2021-10-21 20:03:31,576 INFO L226 Difference]: Without dead ends: 120 [2021-10-21 20:03:31,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 497.0ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 20:03:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-21 20:03:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-10-21 20:03:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2021-10-21 20:03:31,582 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2021-10-21 20:03:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:31,583 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2021-10-21 20:03:31,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2021-10-21 20:03:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-21 20:03:31,584 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:31,585 INFO L512 BasicCegarLoop]: trace histogram [48, 27, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:31,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:31,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-21 20:03:31,790 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash 41791360, now seen corresponding path program 27 times [2021-10-21 20:03:31,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:31,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956326363] [2021-10-21 20:03:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:31,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1148 proven. 756 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-10-21 20:03:32,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:32,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956326363] [2021-10-21 20:03:32,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956326363] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:32,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601080309] [2021-10-21 20:03:32,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:03:32,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:32,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:32,402 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:32,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 20:03:33,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2021-10-21 20:03:33,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:33,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 20:03:33,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1161 proven. 441 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-10-21 20:03:34,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601080309] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:34,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:34,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 24] total 61 [2021-10-21 20:03:34,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807438384] [2021-10-21 20:03:34,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-10-21 20:03:34,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:34,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-10-21 20:03:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-10-21 20:03:34,111 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 61 states, 61 states have (on average 2.3934426229508197) internal successors, (146), 61 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:34,293 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2021-10-21 20:03:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-21 20:03:34,294 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3934426229508197) internal successors, (146), 61 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-10-21 20:03:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:34,295 INFO L225 Difference]: With dead ends: 169 [2021-10-21 20:03:34,295 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 20:03:34,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1236.0ms TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-10-21 20:03:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 20:03:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-10-21 20:03:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2021-10-21 20:03:34,305 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2021-10-21 20:03:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:34,305 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2021-10-21 20:03:34,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3934426229508197) internal successors, (146), 61 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:34,306 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2021-10-21 20:03:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-21 20:03:34,307 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:34,308 INFO L512 BasicCegarLoop]: trace histogram [50, 28, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:34,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:34,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-21 20:03:34,530 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash -948329129, now seen corresponding path program 28 times [2021-10-21 20:03:34,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:34,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51917874] [2021-10-21 20:03:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:34,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-10-21 20:03:35,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:35,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51917874] [2021-10-21 20:03:35,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51917874] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:35,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344351566] [2021-10-21 20:03:35,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:03:35,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:35,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:35,218 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:35,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 20:03:35,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:03:35,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:35,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-21 20:03:35,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-10-21 20:03:36,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344351566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:36,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:36,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-10-21 20:03:36,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948567119] [2021-10-21 20:03:36,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-21 20:03:36,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:36,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-21 20:03:36,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-10-21 20:03:36,173 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:36,260 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2021-10-21 20:03:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-21 20:03:36,261 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-10-21 20:03:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:36,261 INFO L225 Difference]: With dead ends: 172 [2021-10-21 20:03:36,261 INFO L226 Difference]: Without dead ends: 126 [2021-10-21 20:03:36,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 574.4ms TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-10-21 20:03:36,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-21 20:03:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-10-21 20:03:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-10-21 20:03:36,266 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2021-10-21 20:03:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:36,267 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-10-21 20:03:36,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-10-21 20:03:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-21 20:03:36,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:36,268 INFO L512 BasicCegarLoop]: trace histogram [51, 29, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:36,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:36,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 20:03:36,468 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:36,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:36,469 INFO L82 PathProgramCache]: Analyzing trace with hash 567459572, now seen corresponding path program 29 times [2021-10-21 20:03:36,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:36,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681431233] [2021-10-21 20:03:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:36,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1290 proven. 870 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-10-21 20:03:37,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:37,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681431233] [2021-10-21 20:03:37,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681431233] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:37,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502638755] [2021-10-21 20:03:37,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:03:37,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:37,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:37,166 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:37,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 20:03:37,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2021-10-21 20:03:37,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 20:03:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 625 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-10-21 20:03:39,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502638755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:39,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:39,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 28] total 67 [2021-10-21 20:03:39,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229203433] [2021-10-21 20:03:39,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-10-21 20:03:39,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:39,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-10-21 20:03:39,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-10-21 20:03:39,096 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:39,325 INFO L93 Difference]: Finished difference Result 183 states and 189 transitions. [2021-10-21 20:03:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-21 20:03:39,325 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-10-21 20:03:39,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:39,327 INFO L225 Difference]: With dead ends: 183 [2021-10-21 20:03:39,327 INFO L226 Difference]: Without dead ends: 137 [2021-10-21 20:03:39,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1520.9ms TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-10-21 20:03:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-21 20:03:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-10-21 20:03:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-10-21 20:03:39,334 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 125 [2021-10-21 20:03:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:39,334 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-10-21 20:03:39,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-10-21 20:03:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-10-21 20:03:39,342 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:39,343 INFO L512 BasicCegarLoop]: trace histogram [56, 30, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:39,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:39,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-21 20:03:39,558 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:39,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:39,558 INFO L82 PathProgramCache]: Analyzing trace with hash 651845945, now seen corresponding path program 30 times [2021-10-21 20:03:39,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:39,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435136629] [2021-10-21 20:03:39,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:39,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1581 proven. 930 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-10-21 20:03:40,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:40,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435136629] [2021-10-21 20:03:40,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435136629] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:40,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116385398] [2021-10-21 20:03:40,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:03:40,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:40,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:40,410 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:40,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 20:03:41,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2021-10-21 20:03:41,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:41,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 20:03:41,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 784 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2021-10-21 20:03:42,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116385398] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:42,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:42,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 31] total 71 [2021-10-21 20:03:42,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562661689] [2021-10-21 20:03:42,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-10-21 20:03:42,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-10-21 20:03:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-10-21 20:03:42,640 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 71 states, 71 states have (on average 2.3380281690140845) internal successors, (166), 71 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:42,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:42,884 INFO L93 Difference]: Finished difference Result 199 states and 204 transitions. [2021-10-21 20:03:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-10-21 20:03:42,885 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.3380281690140845) internal successors, (166), 71 states have internal predecessors, (166), 0 states have call successors, (0), 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 135 [2021-10-21 20:03:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:42,886 INFO L225 Difference]: With dead ends: 199 [2021-10-21 20:03:42,886 INFO L226 Difference]: Without dead ends: 145 [2021-10-21 20:03:42,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1866.6ms TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-10-21 20:03:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-21 20:03:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-10-21 20:03:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2021-10-21 20:03:42,894 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 135 [2021-10-21 20:03:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:42,894 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2021-10-21 20:03:42,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.3380281690140845) internal successors, (166), 71 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:42,895 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2021-10-21 20:03:42,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-21 20:03:42,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:42,896 INFO L512 BasicCegarLoop]: trace histogram [60, 31, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:42,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:43,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-21 20:03:43,122 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:43,122 INFO L82 PathProgramCache]: Analyzing trace with hash 403121732, now seen corresponding path program 31 times [2021-10-21 20:03:43,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:43,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639631317] [2021-10-21 20:03:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:43,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1824 proven. 992 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-10-21 20:03:43,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:43,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639631317] [2021-10-21 20:03:43,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639631317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:43,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164482964] [2021-10-21 20:03:43,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:03:43,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:43,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:43,969 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:43,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 20:03:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:44,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-21 20:03:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1824 proven. 992 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-10-21 20:03:45,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164482964] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:45,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:45,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-10-21 20:03:45,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933051801] [2021-10-21 20:03:45,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-21 20:03:45,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:45,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-21 20:03:45,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 20:03:45,113 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:45,243 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2021-10-21 20:03:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-21 20:03:45,243 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-10-21 20:03:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:45,245 INFO L225 Difference]: With dead ends: 206 [2021-10-21 20:03:45,245 INFO L226 Difference]: Without dead ends: 146 [2021-10-21 20:03:45,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 719.3ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 20:03:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-21 20:03:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-10-21 20:03:45,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2021-10-21 20:03:45,251 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2021-10-21 20:03:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:45,252 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2021-10-21 20:03:45,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2021-10-21 20:03:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-10-21 20:03:45,253 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:45,253 INFO L512 BasicCegarLoop]: trace histogram [61, 32, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:45,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:45,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-21 20:03:45,478 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:45,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:45,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1973964641, now seen corresponding path program 32 times [2021-10-21 20:03:45,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:45,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431363427] [2021-10-21 20:03:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:45,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1881 proven. 1056 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-10-21 20:03:46,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:46,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431363427] [2021-10-21 20:03:46,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431363427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:46,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133858889] [2021-10-21 20:03:46,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:03:46,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:46,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:46,418 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:46,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 20:03:47,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:03:47,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:47,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-21 20:03:47,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1881 proven. 1056 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-10-21 20:03:47,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133858889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:47,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:47,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-10-21 20:03:47,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116113593] [2021-10-21 20:03:47,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-21 20:03:47,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-21 20:03:47,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-21 20:03:47,799 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:47,930 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2021-10-21 20:03:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-21 20:03:47,931 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 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 145 [2021-10-21 20:03:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:47,932 INFO L225 Difference]: With dead ends: 208 [2021-10-21 20:03:47,932 INFO L226 Difference]: Without dead ends: 148 [2021-10-21 20:03:47,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 799.2ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-21 20:03:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-21 20:03:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-10-21 20:03:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2021-10-21 20:03:47,939 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2021-10-21 20:03:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:47,939 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2021-10-21 20:03:47,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2021-10-21 20:03:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-21 20:03:47,941 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:47,941 INFO L512 BasicCegarLoop]: trace histogram [62, 33, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:47,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-21 20:03:48,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 20:03:48,150 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash -274488002, now seen corresponding path program 33 times [2021-10-21 20:03:48,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:48,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107366618] [2021-10-21 20:03:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:48,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1938 proven. 1122 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-10-21 20:03:49,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:49,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107366618] [2021-10-21 20:03:49,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107366618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:49,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029230888] [2021-10-21 20:03:49,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:03:49,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:49,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:49,087 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:49,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-21 20:03:50,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2021-10-21 20:03:50,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:50,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 20:03:50,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1947 proven. 841 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-10-21 20:03:51,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029230888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:51,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:51,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 32] total 75 [2021-10-21 20:03:51,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399915302] [2021-10-21 20:03:51,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-10-21 20:03:51,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:51,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-10-21 20:03:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-10-21 20:03:51,639 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 75 states, 75 states have (on average 2.32) internal successors, (174), 75 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:51,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:51,939 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2021-10-21 20:03:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-10-21 20:03:51,939 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.32) internal successors, (174), 75 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-10-21 20:03:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:51,940 INFO L225 Difference]: With dead ends: 213 [2021-10-21 20:03:51,940 INFO L226 Difference]: Without dead ends: 153 [2021-10-21 20:03:51,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1986.0ms TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-10-21 20:03:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-21 20:03:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-10-21 20:03:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2021-10-21 20:03:51,947 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 147 [2021-10-21 20:03:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:51,947 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2021-10-21 20:03:51,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.32) internal successors, (174), 75 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2021-10-21 20:03:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-21 20:03:51,949 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:51,949 INFO L512 BasicCegarLoop]: trace histogram [64, 34, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:51,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-21 20:03:52,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:52,165 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:52,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:52,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1397712405, now seen corresponding path program 34 times [2021-10-21 20:03:52,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:52,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548004092] [2021-10-21 20:03:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:52,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2065 proven. 1190 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-10-21 20:03:52,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:52,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548004092] [2021-10-21 20:03:52,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548004092] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:52,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547138192] [2021-10-21 20:03:52,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:03:52,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:52,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:52,993 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:52,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-21 20:03:53,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:03:53,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:53,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-21 20:03:53,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2065 proven. 1190 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-10-21 20:03:54,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547138192] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:54,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:54,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-10-21 20:03:54,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667952796] [2021-10-21 20:03:54,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-21 20:03:54,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:54,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-21 20:03:54,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-21 20:03:54,392 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 47 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:54,537 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2021-10-21 20:03:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-21 20:03:54,538 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 47 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-10-21 20:03:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:54,540 INFO L225 Difference]: With dead ends: 216 [2021-10-21 20:03:54,540 INFO L226 Difference]: Without dead ends: 154 [2021-10-21 20:03:54,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 715.6ms TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-21 20:03:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-21 20:03:54,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-10-21 20:03:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2021-10-21 20:03:54,549 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 151 [2021-10-21 20:03:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:54,550 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2021-10-21 20:03:54,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 47 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2021-10-21 20:03:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-10-21 20:03:54,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:54,552 INFO L512 BasicCegarLoop]: trace histogram [65, 35, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:54,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:54,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-21 20:03:54,766 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:54,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1098392114, now seen corresponding path program 35 times [2021-10-21 20:03:54,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:54,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840301424] [2021-10-21 20:03:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:54,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2124 proven. 1260 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-10-21 20:03:55,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:55,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840301424] [2021-10-21 20:03:55,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840301424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:55,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245161234] [2021-10-21 20:03:55,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:03:55,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:55,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:55,950 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:55,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-21 20:03:57,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-10-21 20:03:57,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:03:57,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 20:03:57,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 1024 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-10-21 20:03:59,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245161234] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:59,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:59,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 35] total 80 [2021-10-21 20:03:59,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910909688] [2021-10-21 20:03:59,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-10-21 20:03:59,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:59,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-10-21 20:03:59,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-10-21 20:03:59,083 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:59,450 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2021-10-21 20:03:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-10-21 20:03:59,451 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 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 153 [2021-10-21 20:03:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:59,452 INFO L225 Difference]: With dead ends: 225 [2021-10-21 20:03:59,452 INFO L226 Difference]: Without dead ends: 163 [2021-10-21 20:03:59,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2558.2ms TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-10-21 20:03:59,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-21 20:03:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-10-21 20:03:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2021-10-21 20:03:59,459 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 153 [2021-10-21 20:03:59,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:59,460 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2021-10-21 20:03:59,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2021-10-21 20:03:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-10-21 20:03:59,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:59,462 INFO L512 BasicCegarLoop]: trace histogram [69, 36, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:59,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-21 20:03:59,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-21 20:03:59,690 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:59,690 INFO L82 PathProgramCache]: Analyzing trace with hash -510719171, now seen corresponding path program 36 times [2021-10-21 20:03:59,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:59,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063619009] [2021-10-21 20:03:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:59,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2405 proven. 1332 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-21 20:04:00,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:00,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063619009] [2021-10-21 20:04:00,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063619009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:00,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048896338] [2021-10-21 20:04:00,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:04:00,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:00,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:00,906 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:00,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-21 20:04:02,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2021-10-21 20:04:02,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:02,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-21 20:04:02,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2405 proven. 1332 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-21 20:04:02,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048896338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:02,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:02,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-10-21 20:04:02,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930188650] [2021-10-21 20:04:02,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-21 20:04:02,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:02,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-21 20:04:02,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 20:04:02,529 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:02,658 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2021-10-21 20:04:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-21 20:04:02,659 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 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 161 [2021-10-21 20:04:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:02,660 INFO L225 Difference]: With dead ends: 232 [2021-10-21 20:04:02,660 INFO L226 Difference]: Without dead ends: 164 [2021-10-21 20:04:02,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1028.0ms TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 20:04:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-21 20:04:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-10-21 20:04:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2021-10-21 20:04:02,665 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2021-10-21 20:04:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:02,666 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2021-10-21 20:04:02,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2021-10-21 20:04:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-10-21 20:04:02,667 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:02,667 INFO L512 BasicCegarLoop]: trace histogram [70, 37, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:02,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-21 20:04:02,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-21 20:04:02,881 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash 249890586, now seen corresponding path program 37 times [2021-10-21 20:04:02,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:02,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001072239] [2021-10-21 20:04:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:02,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-21 20:04:03,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:03,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001072239] [2021-10-21 20:04:03,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001072239] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:03,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481269562] [2021-10-21 20:04:03,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:04:03,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:03,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:03,983 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:04,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-21 20:04:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:05,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-21 20:04:05,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-21 20:04:05,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481269562] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:05,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:05,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-10-21 20:04:05,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120166440] [2021-10-21 20:04:05,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-21 20:04:05,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:05,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-21 20:04:05,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 20:04:05,613 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:05,739 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2021-10-21 20:04:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-21 20:04:05,740 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-10-21 20:04:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:05,741 INFO L225 Difference]: With dead ends: 234 [2021-10-21 20:04:05,741 INFO L226 Difference]: Without dead ends: 166 [2021-10-21 20:04:05,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 946.0ms TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 20:04:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-21 20:04:05,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-10-21 20:04:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2021-10-21 20:04:05,749 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2021-10-21 20:04:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:05,749 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2021-10-21 20:04:05,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2021-10-21 20:04:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-21 20:04:05,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:05,751 INFO L512 BasicCegarLoop]: trace histogram [71, 38, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:05,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-21 20:04:05,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:05,978 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:05,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1051426743, now seen corresponding path program 38 times [2021-10-21 20:04:05,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:05,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657425201] [2021-10-21 20:04:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:05,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2535 proven. 1482 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-21 20:04:07,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:07,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657425201] [2021-10-21 20:04:07,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657425201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:07,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722127233] [2021-10-21 20:04:07,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:04:07,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:07,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:07,024 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:07,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-21 20:04:08,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:04:08,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:08,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-21 20:04:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2535 proven. 1482 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-21 20:04:08,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722127233] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:08,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:08,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-10-21 20:04:08,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248426669] [2021-10-21 20:04:08,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 20:04:08,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:08,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 20:04:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 20:04:08,686 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:08,862 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2021-10-21 20:04:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-21 20:04:08,863 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 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 165 [2021-10-21 20:04:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:08,864 INFO L225 Difference]: With dead ends: 236 [2021-10-21 20:04:08,864 INFO L226 Difference]: Without dead ends: 168 [2021-10-21 20:04:08,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 912.0ms TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 20:04:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-21 20:04:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-10-21 20:04:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2021-10-21 20:04:08,877 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2021-10-21 20:04:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:08,878 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2021-10-21 20:04:08,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2021-10-21 20:04:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-10-21 20:04:08,880 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:08,880 INFO L512 BasicCegarLoop]: trace histogram [72, 39, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:08,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:09,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-21 20:04:09,102 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:09,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1766439660, now seen corresponding path program 39 times [2021-10-21 20:04:09,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:09,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989193194] [2021-10-21 20:04:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:09,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2600 proven. 1560 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-10-21 20:04:10,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:10,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989193194] [2021-10-21 20:04:10,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989193194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:10,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164271518] [2021-10-21 20:04:10,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:04:10,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:10,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:10,226 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:10,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-21 20:04:11,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2021-10-21 20:04:11,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:11,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-21 20:04:11,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2613 proven. 1089 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-10-21 20:04:13,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164271518] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:13,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:13,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 36] total 85 [2021-10-21 20:04:13,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180081815] [2021-10-21 20:04:13,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-10-21 20:04:13,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:13,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-10-21 20:04:13,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-10-21 20:04:13,615 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 85 states, 85 states have (on average 2.2823529411764705) internal successors, (194), 85 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:14,015 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2021-10-21 20:04:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-10-21 20:04:14,016 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.2823529411764705) internal successors, (194), 85 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-10-21 20:04:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:14,017 INFO L225 Difference]: With dead ends: 241 [2021-10-21 20:04:14,017 INFO L226 Difference]: Without dead ends: 173 [2021-10-21 20:04:14,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2586.2ms TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-10-21 20:04:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-21 20:04:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2021-10-21 20:04:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2021-10-21 20:04:14,025 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2021-10-21 20:04:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:14,025 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2021-10-21 20:04:14,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.2823529411764705) internal successors, (194), 85 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2021-10-21 20:04:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-21 20:04:14,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:14,027 INFO L512 BasicCegarLoop]: trace histogram [74, 40, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:14,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:14,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-21 20:04:14,254 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:14,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:14,254 INFO L82 PathProgramCache]: Analyzing trace with hash -502982677, now seen corresponding path program 40 times [2021-10-21 20:04:14,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:14,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916992568] [2021-10-21 20:04:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:14,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-10-21 20:04:15,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:15,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916992568] [2021-10-21 20:04:15,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916992568] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:15,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910003271] [2021-10-21 20:04:15,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:04:15,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:15,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:15,379 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:15,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-21 20:04:16,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:04:16,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:16,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-21 20:04:16,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-10-21 20:04:17,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910003271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:17,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:17,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-10-21 20:04:17,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815206036] [2021-10-21 20:04:17,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-21 20:04:17,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:17,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-21 20:04:17,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-10-21 20:04:17,013 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:17,178 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2021-10-21 20:04:17,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-21 20:04:17,179 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 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 171 [2021-10-21 20:04:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:17,180 INFO L225 Difference]: With dead ends: 244 [2021-10-21 20:04:17,180 INFO L226 Difference]: Without dead ends: 174 [2021-10-21 20:04:17,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 979.6ms TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-10-21 20:04:17,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-10-21 20:04:17,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-10-21 20:04:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2021-10-21 20:04:17,187 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2021-10-21 20:04:17,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:17,188 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2021-10-21 20:04:17,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:17,188 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2021-10-21 20:04:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-10-21 20:04:17,190 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:17,190 INFO L512 BasicCegarLoop]: trace histogram [75, 41, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:17,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-21 20:04:17,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:17,406 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:17,406 INFO L82 PathProgramCache]: Analyzing trace with hash -305421432, now seen corresponding path program 41 times [2021-10-21 20:04:17,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:17,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570731954] [2021-10-21 20:04:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:17,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:20,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:20,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570731954] [2021-10-21 20:04:20,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570731954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:20,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48898962] [2021-10-21 20:04:20,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:04:20,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:20,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:20,229 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:20,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-21 20:04:21,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2021-10-21 20:04:21,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:21,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 20:04:21,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2850 proven. 1369 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-10-21 20:04:22,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48898962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:22,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:22,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 40] total 90 [2021-10-21 20:04:22,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145121327] [2021-10-21 20:04:22,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-10-21 20:04:22,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:22,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-10-21 20:04:22,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-10-21 20:04:22,238 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 90 states, 90 states have (on average 2.2777777777777777) internal successors, (205), 90 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:22,599 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2021-10-21 20:04:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-10-21 20:04:22,599 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.2777777777777777) internal successors, (205), 90 states have internal predecessors, (205), 0 states have call successors, (0), 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 173 [2021-10-21 20:04:22,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:22,600 INFO L225 Difference]: With dead ends: 186 [2021-10-21 20:04:22,600 INFO L226 Difference]: Without dead ends: 183 [2021-10-21 20:04:22,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2872.6ms TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-10-21 20:04:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-10-21 20:04:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2021-10-21 20:04:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2021-10-21 20:04:22,608 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 173 [2021-10-21 20:04:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:22,608 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2021-10-21 20:04:22,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.2777777777777777) internal successors, (205), 90 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2021-10-21 20:04:22,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-10-21 20:04:22,610 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:22,611 INFO L512 BasicCegarLoop]: trace histogram [79, 41, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:22,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-21 20:04:22,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:22,830 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:22,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:22,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2140145552, now seen corresponding path program 42 times [2021-10-21 20:04:22,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:22,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34615757] [2021-10-21 20:04:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:22,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:26,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:26,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34615757] [2021-10-21 20:04:26,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34615757] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:26,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803204041] [2021-10-21 20:04:26,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:04:26,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:26,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:26,235 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:26,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-21 20:04:27,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-10-21 20:04:27,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:27,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-21 20:04:27,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2021-10-21 20:04:28,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803204041] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:28,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:28,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 42] total 92 [2021-10-21 20:04:28,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775411020] [2021-10-21 20:04:28,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-10-21 20:04:28,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:28,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-10-21 20:04:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-10-21 20:04:28,238 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 92 states, 92 states have (on average 2.25) internal successors, (207), 92 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:28,603 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2021-10-21 20:04:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-10-21 20:04:28,604 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.25) internal successors, (207), 92 states have internal predecessors, (207), 0 states have call successors, (0), 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 181 [2021-10-21 20:04:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:28,605 INFO L225 Difference]: With dead ends: 190 [2021-10-21 20:04:28,605 INFO L226 Difference]: Without dead ends: 187 [2021-10-21 20:04:28,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3277.5ms TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-10-21 20:04:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-21 20:04:28,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-10-21 20:04:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2021-10-21 20:04:28,611 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 181 [2021-10-21 20:04:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:28,611 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2021-10-21 20:04:28,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.25) internal successors, (207), 92 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2021-10-21 20:04:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-10-21 20:04:28,613 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:28,613 INFO L512 BasicCegarLoop]: trace histogram [81, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:28,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-21 20:04:28,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-21 20:04:28,814 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:28,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:28,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1382163484, now seen corresponding path program 43 times [2021-10-21 20:04:28,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:28,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401055235] [2021-10-21 20:04:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:28,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:32,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:32,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401055235] [2021-10-21 20:04:32,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401055235] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:32,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23814209] [2021-10-21 20:04:32,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:04:32,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:32,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:32,210 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:32,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-21 20:04:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-21 20:04:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:34,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23814209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:34,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:34,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-10-21 20:04:34,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003296489] [2021-10-21 20:04:34,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-10-21 20:04:34,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:34,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-10-21 20:04:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-10-21 20:04:34,068 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 94 states, 94 states have (on average 2.0) internal successors, (188), 94 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:34,410 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2021-10-21 20:04:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-10-21 20:04:34,411 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 94 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-10-21 20:04:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:34,412 INFO L225 Difference]: With dead ends: 192 [2021-10-21 20:04:34,412 INFO L226 Difference]: Without dead ends: 189 [2021-10-21 20:04:34,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3161.7ms TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-10-21 20:04:34,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-21 20:04:34,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2021-10-21 20:04:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2021-10-21 20:04:34,418 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 185 [2021-10-21 20:04:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:34,419 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2021-10-21 20:04:34,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 94 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2021-10-21 20:04:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-10-21 20:04:34,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:34,420 INFO L512 BasicCegarLoop]: trace histogram [82, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:34,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:34,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:34,633 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:34,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1121752098, now seen corresponding path program 44 times [2021-10-21 20:04:34,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:34,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311343842] [2021-10-21 20:04:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:34,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:37,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:37,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311343842] [2021-10-21 20:04:37,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311343842] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:37,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897577614] [2021-10-21 20:04:37,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:04:37,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:37,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:37,982 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:37,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-21 20:04:39,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:04:39,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-21 20:04:39,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:40,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897577614] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:40,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:40,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2021-10-21 20:04:40,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968520713] [2021-10-21 20:04:40,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-10-21 20:04:40,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:40,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-10-21 20:04:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-10-21 20:04:40,031 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 95 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:40,569 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2021-10-21 20:04:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-21 20:04:40,569 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-10-21 20:04:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:40,570 INFO L225 Difference]: With dead ends: 194 [2021-10-21 20:04:40,570 INFO L226 Difference]: Without dead ends: 191 [2021-10-21 20:04:40,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3088.4ms TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-10-21 20:04:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-21 20:04:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2021-10-21 20:04:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:40,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2021-10-21 20:04:40,581 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 187 [2021-10-21 20:04:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:40,582 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2021-10-21 20:04:40,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2021-10-21 20:04:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-10-21 20:04:40,583 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:40,584 INFO L512 BasicCegarLoop]: trace histogram [83, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:40,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:40,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-21 20:04:40,786 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash 25486680, now seen corresponding path program 45 times [2021-10-21 20:04:40,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:40,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104443333] [2021-10-21 20:04:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:40,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:43,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:43,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104443333] [2021-10-21 20:04:43,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104443333] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:43,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655381888] [2021-10-21 20:04:43,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:04:43,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:43,956 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:43,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-21 20:04:45,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2021-10-21 20:04:45,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:45,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 94 conjunts are in the unsatisfiable core [2021-10-21 20:04:45,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:46,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655381888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:46,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:46,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-10-21 20:04:46,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488232511] [2021-10-21 20:04:46,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-10-21 20:04:46,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-10-21 20:04:46,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-10-21 20:04:46,034 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 96 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:46,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:46,463 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2021-10-21 20:04:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-10-21 20:04:46,463 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 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 189 [2021-10-21 20:04:46,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:46,464 INFO L225 Difference]: With dead ends: 196 [2021-10-21 20:04:46,465 INFO L226 Difference]: Without dead ends: 193 [2021-10-21 20:04:46,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2956.9ms TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-10-21 20:04:46,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-10-21 20:04:46,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-10-21 20:04:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2021-10-21 20:04:46,470 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2021-10-21 20:04:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:46,470 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2021-10-21 20:04:46,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2021-10-21 20:04:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-10-21 20:04:46,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:46,472 INFO L512 BasicCegarLoop]: trace histogram [84, 43, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:46,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:46,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-21 20:04:46,689 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:46,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:46,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1284642734, now seen corresponding path program 46 times [2021-10-21 20:04:46,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:46,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097193375] [2021-10-21 20:04:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:46,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:49,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:49,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097193375] [2021-10-21 20:04:49,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097193375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:49,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695559937] [2021-10-21 20:04:49,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:04:49,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:49,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:49,863 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:49,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-21 20:04:51,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:04:51,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:51,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 95 conjunts are in the unsatisfiable core [2021-10-21 20:04:51,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:51,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695559937] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:51,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:51,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-10-21 20:04:51,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349834932] [2021-10-21 20:04:51,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-10-21 20:04:51,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-10-21 20:04:51,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-21 20:04:51,982 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:52,365 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2021-10-21 20:04:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-21 20:04:52,366 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-10-21 20:04:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:52,367 INFO L225 Difference]: With dead ends: 198 [2021-10-21 20:04:52,367 INFO L226 Difference]: Without dead ends: 195 [2021-10-21 20:04:52,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2957.8ms TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-21 20:04:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-10-21 20:04:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-10-21 20:04:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0103626943005182) internal successors, (195), 193 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2021-10-21 20:04:52,376 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2021-10-21 20:04:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:52,377 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2021-10-21 20:04:52,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2021-10-21 20:04:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-10-21 20:04:52,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:52,379 INFO L512 BasicCegarLoop]: trace histogram [85, 44, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:52,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:52,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:52,589 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:52,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:52,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591860, now seen corresponding path program 47 times [2021-10-21 20:04:52,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:52,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469866026] [2021-10-21 20:04:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:52,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:56,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:56,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469866026] [2021-10-21 20:04:56,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469866026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:56,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007768392] [2021-10-21 20:04:56,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:04:56,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:56,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:56,061 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:56,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-21 20:04:57,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 86 check-sat command(s) [2021-10-21 20:04:57,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:57,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-21 20:04:57,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3649 proven. 1936 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-10-21 20:04:58,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007768392] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:58,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:58,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 47] total 97 [2021-10-21 20:04:58,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433284014] [2021-10-21 20:04:58,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-10-21 20:04:58,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-10-21 20:04:58,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-21 20:04:58,158 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 97 states, 97 states have (on average 2.216494845360825) internal successors, (215), 97 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:58,545 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2021-10-21 20:04:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-10-21 20:04:58,545 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.216494845360825) internal successors, (215), 97 states have internal predecessors, (215), 0 states have call successors, (0), 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 193 [2021-10-21 20:04:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:58,546 INFO L225 Difference]: With dead ends: 200 [2021-10-21 20:04:58,546 INFO L226 Difference]: Without dead ends: 197 [2021-10-21 20:04:58,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3275.4ms TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-21 20:04:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-21 20:04:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-10-21 20:04:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2021-10-21 20:04:58,554 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 193 [2021-10-21 20:04:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:58,554 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2021-10-21 20:04:58,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.216494845360825) internal successors, (215), 97 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2021-10-21 20:04:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-10-21 20:04:58,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:58,556 INFO L512 BasicCegarLoop]: trace histogram [86, 45, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:58,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:58,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:58,777 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1316817606, now seen corresponding path program 48 times [2021-10-21 20:04:58,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:58,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413272583] [2021-10-21 20:04:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:58,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:02,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:02,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413272583] [2021-10-21 20:05:02,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413272583] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:02,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917839249] [2021-10-21 20:05:02,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:05:02,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:02,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:02,269 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:05:02,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-21 20:05:04,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2021-10-21 20:05:04,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:05:04,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-21 20:05:04,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3731 proven. 2025 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-10-21 20:05:04,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917839249] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:04,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:04,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 48] total 98 [2021-10-21 20:05:04,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246757102] [2021-10-21 20:05:04,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-10-21 20:05:04,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:04,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-10-21 20:05:04,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-10-21 20:05:04,586 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 98 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 98 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:05,009 INFO L93 Difference]: Finished difference Result 202 states and 203 transitions. [2021-10-21 20:05:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-21 20:05:05,010 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 98 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-10-21 20:05:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:05,011 INFO L225 Difference]: With dead ends: 202 [2021-10-21 20:05:05,011 INFO L226 Difference]: Without dead ends: 199 [2021-10-21 20:05:05,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3308.1ms TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-10-21 20:05:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-21 20:05:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2021-10-21 20:05:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2021-10-21 20:05:05,016 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2021-10-21 20:05:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:05,016 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2021-10-21 20:05:05,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 98 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:05,016 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2021-10-21 20:05:05,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-10-21 20:05:05,017 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:05,018 INFO L512 BasicCegarLoop]: trace histogram [87, 46, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:05,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:05,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-21 20:05:05,234 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:05,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:05,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1561171392, now seen corresponding path program 49 times [2021-10-21 20:05:05,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:05,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536864389] [2021-10-21 20:05:05,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:05,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:08,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:08,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536864389] [2021-10-21 20:05:08,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536864389] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:08,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063788133] [2021-10-21 20:05:08,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:05:08,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:08,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:08,655 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:05:08,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-21 20:05:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:10,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-21 20:05:10,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:11,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063788133] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:11,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:11,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2021-10-21 20:05:11,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036150251] [2021-10-21 20:05:11,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-10-21 20:05:11,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:11,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-10-21 20:05:11,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-10-21 20:05:11,276 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 100 states, 100 states have (on average 2.0) internal successors, (200), 100 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:11,713 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2021-10-21 20:05:11,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-10-21 20:05:11,718 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 100 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-10-21 20:05:11,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:11,720 INFO L225 Difference]: With dead ends: 204 [2021-10-21 20:05:11,720 INFO L226 Difference]: Without dead ends: 201 [2021-10-21 20:05:11,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3209.3ms TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-10-21 20:05:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-10-21 20:05:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-10-21 20:05:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2021-10-21 20:05:11,726 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 197 [2021-10-21 20:05:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:11,726 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2021-10-21 20:05:11,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 100 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2021-10-21 20:05:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-10-21 20:05:11,728 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:11,728 INFO L512 BasicCegarLoop]: trace histogram [88, 47, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:11,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:11,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:11,929 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:11,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:11,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1349659846, now seen corresponding path program 50 times [2021-10-21 20:05:11,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:11,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999781297] [2021-10-21 20:05:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:11,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:15,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:15,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999781297] [2021-10-21 20:05:15,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999781297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:15,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731271756] [2021-10-21 20:05:15,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:05:15,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:15,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:15,733 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:05:15,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-21 20:05:17,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:05:17,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:05:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-21 20:05:17,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:18,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731271756] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:18,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:18,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2021-10-21 20:05:18,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337330129] [2021-10-21 20:05:18,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-10-21 20:05:18,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:18,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-10-21 20:05:18,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-10-21 20:05:18,255 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 101 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:18,729 INFO L93 Difference]: Finished difference Result 206 states and 207 transitions. [2021-10-21 20:05:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-10-21 20:05:18,730 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 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 199 [2021-10-21 20:05:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:18,732 INFO L225 Difference]: With dead ends: 206 [2021-10-21 20:05:18,732 INFO L226 Difference]: Without dead ends: 203 [2021-10-21 20:05:18,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3561.6ms TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-10-21 20:05:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-21 20:05:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2021-10-21 20:05:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0099502487562189) internal successors, (203), 201 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2021-10-21 20:05:18,740 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 199 [2021-10-21 20:05:18,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:18,740 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2021-10-21 20:05:18,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:18,741 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2021-10-21 20:05:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-10-21 20:05:18,742 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:18,742 INFO L512 BasicCegarLoop]: trace histogram [89, 48, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:18,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:18,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-21 20:05:18,943 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:18,943 INFO L82 PathProgramCache]: Analyzing trace with hash 49472948, now seen corresponding path program 51 times [2021-10-21 20:05:18,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:18,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212869135] [2021-10-21 20:05:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:18,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:22,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:22,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212869135] [2021-10-21 20:05:22,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212869135] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:22,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525925308] [2021-10-21 20:05:22,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:05:22,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:22,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:22,948 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:05:22,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-21 20:05:25,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2021-10-21 20:05:25,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:05:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 100 conjunts are in the unsatisfiable core [2021-10-21 20:05:25,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:25,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525925308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:25,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:25,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2021-10-21 20:05:25,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012369287] [2021-10-21 20:05:25,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-10-21 20:05:25,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-10-21 20:05:25,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-10-21 20:05:25,671 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 102 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:26,111 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2021-10-21 20:05:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-10-21 20:05:26,111 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 0 states have call successors, (0), 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 201 [2021-10-21 20:05:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:26,114 INFO L225 Difference]: With dead ends: 208 [2021-10-21 20:05:26,114 INFO L226 Difference]: Without dead ends: 205 [2021-10-21 20:05:26,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3718.7ms TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-10-21 20:05:26,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-21 20:05:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-10-21 20:05:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:26,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2021-10-21 20:05:26,123 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2021-10-21 20:05:26,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:26,124 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2021-10-21 20:05:26,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:26,124 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2021-10-21 20:05:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-10-21 20:05:26,126 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:26,126 INFO L512 BasicCegarLoop]: trace histogram [90, 49, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:26,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:26,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-21 20:05:26,342 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:26,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:26,342 INFO L82 PathProgramCache]: Analyzing trace with hash 291324334, now seen corresponding path program 52 times [2021-10-21 20:05:26,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:26,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133548355] [2021-10-21 20:05:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:26,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:30,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:30,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133548355] [2021-10-21 20:05:30,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133548355] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:30,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939012960] [2021-10-21 20:05:30,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:05:30,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:30,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:30,286 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:05:30,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-21 20:05:32,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:05:32,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:05:32,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 101 conjunts are in the unsatisfiable core [2021-10-21 20:05:32,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:33,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939012960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:33,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:33,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2021-10-21 20:05:33,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315870049] [2021-10-21 20:05:33,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-10-21 20:05:33,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:33,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-10-21 20:05:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-10-21 20:05:33,014 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 103 states, 103 states have (on average 2.0) internal successors, (206), 103 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:33,586 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2021-10-21 20:05:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-10-21 20:05:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 103 states have internal predecessors, (206), 0 states have call successors, (0), 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 203 [2021-10-21 20:05:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:33,588 INFO L225 Difference]: With dead ends: 209 [2021-10-21 20:05:33,588 INFO L226 Difference]: Without dead ends: 206 [2021-10-21 20:05:33,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3701.3ms TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-10-21 20:05:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-21 20:05:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-10-21 20:05:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.0097560975609756) internal successors, (207), 205 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2021-10-21 20:05:33,595 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 203 [2021-10-21 20:05:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:33,595 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2021-10-21 20:05:33,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 103 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2021-10-21 20:05:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-10-21 20:05:33,597 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:33,597 INFO L512 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:33,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:33,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-21 20:05:33,818 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash 782272296, now seen corresponding path program 53 times [2021-10-21 20:05:33,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:33,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743230424] [2021-10-21 20:05:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:33,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-10-21 20:05:35,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:35,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743230424] [2021-10-21 20:05:35,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743230424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:35,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840054054] [2021-10-21 20:05:35,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:05:35,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:35,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:35,505 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:05:35,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-21 20:05:37,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) [2021-10-21 20:05:37,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:05:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 105 conjunts are in the unsatisfiable core [2021-10-21 20:05:37,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-10-21 20:05:38,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840054054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:38,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:38,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-10-21 20:05:38,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891536889] [2021-10-21 20:05:38,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-21 20:05:38,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:38,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-21 20:05:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2021-10-21 20:05:38,962 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:39,976 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2021-10-21 20:05:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-21 20:05:39,977 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-10-21 20:05:39,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:39,978 INFO L225 Difference]: With dead ends: 212 [2021-10-21 20:05:39,978 INFO L226 Difference]: Without dead ends: 209 [2021-10-21 20:05:39,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1446.6ms TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 20:05:39,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-10-21 20:05:39,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2021-10-21 20:05:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2021-10-21 20:05:39,988 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 205 [2021-10-21 20:05:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:39,988 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2021-10-21 20:05:39,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2021-10-21 20:05:39,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-10-21 20:05:39,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:39,990 INFO L512 BasicCegarLoop]: trace histogram [92, 51, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:40,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:40,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-10-21 20:05:40,197 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:40,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:40,198 INFO L82 PathProgramCache]: Analyzing trace with hash 136861218, now seen corresponding path program 54 times [2021-10-21 20:05:40,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:40,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332456578] [2021-10-21 20:05:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:40,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-10-21 20:05:41,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:41,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332456578] [2021-10-21 20:05:41,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332456578] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:41,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:41,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-10-21 20:05:41,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321982972] [2021-10-21 20:05:41,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-21 20:05:41,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:41,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-21 20:05:41,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 20:05:41,255 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:41,585 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2021-10-21 20:05:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-21 20:05:41,585 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 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 207 [2021-10-21 20:05:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:41,586 INFO L225 Difference]: With dead ends: 208 [2021-10-21 20:05:41,586 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 20:05:41,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 860.7ms TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 20:05:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 20:05:41,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 20:05:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:05:41,587 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 207 [2021-10-21 20:05:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:41,588 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:05:41,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:05:41,589 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 20:05:41,592 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:05:41,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-10-21 20:05:41,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 20:05:41,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:05:41,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:05:41,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:05:41,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:05:41,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:05:41,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:05:41,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:05:41,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:05:41,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:05:41,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:05:42,974 INFO L853 garLoopResultBuilder]: At program point L159(lines 43 160) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 5) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-10-21 20:05:42,974 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 208) no Hoare annotation was computed. [2021-10-21 20:05:42,974 INFO L853 garLoopResultBuilder]: At program point L135(lines 55 136) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 7) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-10-21 20:05:42,974 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 103) no Hoare annotation was computed. [2021-10-21 20:05:42,974 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 20:05:42,974 INFO L857 garLoopResultBuilder]: For program point L61(lines 61 124) no Hoare annotation was computed. [2021-10-21 20:05:42,974 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 20:05:42,975 INFO L853 garLoopResultBuilder]: At program point L111(lines 67 112) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~main__y~0 62) (< ULTIMATE.start_main_~main__x~0 63) (<= 62 ULTIMATE.start_main_~main__x~0) (<= 62 ULTIMATE.start_main_~main__y~0)) (and (<= 51 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 51) (<= 51 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 51)) (and (<= 63 ULTIMATE.start_main_~main__y~0) (< ULTIMATE.start_main_~main__x~0 64) (<= ULTIMATE.start_main_~main__y~0 63) (<= 63 ULTIMATE.start_main_~main__x~0)) (and (<= 57 ULTIMATE.start_main_~main__y~0) (<= 57 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 57) (<= ULTIMATE.start_main_~main__y~0 57)) (and (<= 94 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 94) (<= ULTIMATE.start_main_~main__x~0 94) (<= 94 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 83) (<= ULTIMATE.start_main_~main__x~0 83) (<= 83 ULTIMATE.start_main_~main__x~0) (<= 83 ULTIMATE.start_main_~main__y~0)) (and (<= 89 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 89) (<= 89 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 89)) (and (<= 60 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 60) (<= 60 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 60)) (and (<= ULTIMATE.start_main_~main__y~0 56) (<= 56 ULTIMATE.start_main_~main__y~0) (<= 56 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 56)) (and (<= ULTIMATE.start_main_~main__x~0 88) (<= ULTIMATE.start_main_~main__y~0 88) (<= 88 ULTIMATE.start_main_~main__x~0) (<= 88 ULTIMATE.start_main_~main__y~0)) (and (<= 85 ULTIMATE.start_main_~main__x~0) (<= 85 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 85) (<= ULTIMATE.start_main_~main__y~0 85)) (and (< ULTIMATE.start_main_~main__x~0 70) (<= 69 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 69) (<= 69 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__y~0 59) (<= ULTIMATE.start_main_~main__x~0 59) (<= 59 ULTIMATE.start_main_~main__x~0) (<= 59 ULTIMATE.start_main_~main__y~0)) (and (<= 93 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 93) (<= ULTIMATE.start_main_~main__y~0 93) (<= 93 ULTIMATE.start_main_~main__y~0)) (and (<= 70 ULTIMATE.start_main_~main__y~0) (< ULTIMATE.start_main_~main__x~0 71) (<= ULTIMATE.start_main_~main__y~0 70) (<= 70 ULTIMATE.start_main_~main__x~0)) (and (<= 67 ULTIMATE.start_main_~main__x~0) (<= 67 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 67) (< ULTIMATE.start_main_~main__x~0 68)) (and (<= 95 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 95) (<= ULTIMATE.start_main_~main__x~0 95) (<= 95 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 72) (<= ULTIMATE.start_main_~main__y~0 72) (<= 72 ULTIMATE.start_main_~main__y~0) (<= 72 ULTIMATE.start_main_~main__x~0)) (and (<= 81 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 81) (<= 81 ULTIMATE.start_main_~main__y~0) (< ULTIMATE.start_main_~main__x~0 82)) (and (<= 100 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 100) (< 99 ULTIMATE.start_main_~main__y~0)) (and (<= 97 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 97) (<= ULTIMATE.start_main_~main__x~0 97) (<= 97 ULTIMATE.start_main_~main__x~0)) (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 50) (<= ULTIMATE.start_main_~main__y~0 50)) (and (<= 91 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 91) (<= 91 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 91)) (and (<= ULTIMATE.start_main_~main__y~0 52) (<= 52 ULTIMATE.start_main_~main__y~0) (<= 52 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 52)) (and (<= 77 ULTIMATE.start_main_~main__x~0) (<= 77 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 77) (< ULTIMATE.start_main_~main__x~0 78)) (and (<= 98 ULTIMATE.start_main_~main__y~0) (<= 98 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 98) (<= ULTIMATE.start_main_~main__y~0 98)) (and (<= 82 ULTIMATE.start_main_~main__y~0) (<= 82 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 82) (< ULTIMATE.start_main_~main__x~0 83)) (and (<= 96 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 96) (<= 96 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 96)) (and (<= 65 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 65) (<= ULTIMATE.start_main_~main__y~0 65) (<= 65 ULTIMATE.start_main_~main__y~0)) (and (<= 61 ULTIMATE.start_main_~main__x~0) (<= 61 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 61) (<= ULTIMATE.start_main_~main__y~0 61)) (and (<= ULTIMATE.start_main_~main__x~0 75) (<= ULTIMATE.start_main_~main__y~0 75) (<= 75 ULTIMATE.start_main_~main__y~0) (<= 75 ULTIMATE.start_main_~main__x~0)) (and (<= 54 ULTIMATE.start_main_~main__x~0) (<= 54 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 54) (< ULTIMATE.start_main_~main__x~0 55)) (and (<= 66 ULTIMATE.start_main_~main__x~0) (<= 66 ULTIMATE.start_main_~main__y~0) (< ULTIMATE.start_main_~main__x~0 67) (<= ULTIMATE.start_main_~main__y~0 66)) (and (<= ULTIMATE.start_main_~main__y~0 78) (<= 78 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 78) (<= 78 ULTIMATE.start_main_~main__y~0)) (and (<= 53 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 53) (<= 53 ULTIMATE.start_main_~main__y~0) (< ULTIMATE.start_main_~main__x~0 54)) (and (<= ULTIMATE.start_main_~main__y~0 68) (<= ULTIMATE.start_main_~main__x~0 68) (<= 68 ULTIMATE.start_main_~main__x~0) (<= 68 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 86) (<= ULTIMATE.start_main_~main__y~0 86) (<= 86 ULTIMATE.start_main_~main__x~0) (<= 86 ULTIMATE.start_main_~main__y~0)) (and (< ULTIMATE.start_main_~main__x~0 77) (<= 76 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 76) (<= 76 ULTIMATE.start_main_~main__y~0)) (and (<= 99 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 99) (<= 99 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 99)) (and (<= 79 ULTIMATE.start_main_~main__y~0) (<= 79 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 79) (<= ULTIMATE.start_main_~main__y~0 79)) (and (<= 90 ULTIMATE.start_main_~main__x~0) (<= 90 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 90) (<= ULTIMATE.start_main_~main__x~0 90)) (and (<= 58 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 58) (< ULTIMATE.start_main_~main__x~0 59) (<= 58 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 87) (<= ULTIMATE.start_main_~main__y~0 87) (<= 87 ULTIMATE.start_main_~main__y~0) (<= 87 ULTIMATE.start_main_~main__x~0)) (and (<= 71 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 71) (<= 71 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 71)) (and (<= 64 ULTIMATE.start_main_~main__x~0) (<= 64 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 64) (< ULTIMATE.start_main_~main__x~0 65)) (and (<= ULTIMATE.start_main_~main__x~0 92) (<= ULTIMATE.start_main_~main__y~0 92) (<= 92 ULTIMATE.start_main_~main__x~0) (<= 92 ULTIMATE.start_main_~main__y~0)) (and (<= 73 ULTIMATE.start_main_~main__y~0) (<= 73 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 73) (<= ULTIMATE.start_main_~main__y~0 73)) (and (<= ULTIMATE.start_main_~main__y~0 74) (<= 74 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 74) (<= 74 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 80) (<= 80 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 80) (<= 80 ULTIMATE.start_main_~main__y~0)) (and (<= 84 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 84) (<= 84 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 84)) (and (<= ULTIMATE.start_main_~main__y~0 55) (<= ULTIMATE.start_main_~main__x~0 55) (<= 55 ULTIMATE.start_main_~main__y~0) (<= 55 ULTIMATE.start_main_~main__x~0))) [2021-10-21 20:05:42,975 INFO L857 garLoopResultBuilder]: For program point L37(lines 37 172) no Hoare annotation was computed. [2021-10-21 20:05:42,975 INFO L853 garLoopResultBuilder]: At program point L195(lines 25 196) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 2) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-10-21 20:05:42,975 INFO L857 garLoopResultBuilder]: For program point L96(line 96) no Hoare annotation was computed. [2021-10-21 20:05:42,976 INFO L857 garLoopResultBuilder]: For program point L55(lines 55 136) no Hoare annotation was computed. [2021-10-21 20:05:42,976 INFO L860 garLoopResultBuilder]: At program point L212(lines 13 214) the Hoare annotation is: true [2021-10-21 20:05:42,976 INFO L853 garLoopResultBuilder]: At program point L171(lines 37 172) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 4) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-10-21 20:05:42,976 INFO L857 garLoopResultBuilder]: For program point L31(lines 31 184) no Hoare annotation was computed. [2021-10-21 20:05:42,976 INFO L853 garLoopResultBuilder]: At program point L147(lines 49 148) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 6) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-10-21 20:05:42,976 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 20:05:42,976 INFO L853 garLoopResultBuilder]: At program point L123(lines 61 124) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 8) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-10-21 20:05:42,976 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 96) no Hoare annotation was computed. [2021-10-21 20:05:42,976 INFO L857 garLoopResultBuilder]: For program point L49(lines 49 148) no Hoare annotation was computed. [2021-10-21 20:05:42,976 INFO L857 garLoopResultBuilder]: For program point L74(lines 74 85) no Hoare annotation was computed. [2021-10-21 20:05:42,977 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 20:05:42,977 INFO L857 garLoopResultBuilder]: For program point L25(lines 25 196) no Hoare annotation was computed. [2021-10-21 20:05:42,977 INFO L857 garLoopResultBuilder]: For program point L17(lines 17 213) no Hoare annotation was computed. [2021-10-21 20:05:42,977 INFO L853 garLoopResultBuilder]: At program point L207(lines 19 208) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 1) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-10-21 20:05:42,977 INFO L857 garLoopResultBuilder]: For program point L67(lines 67 112) no Hoare annotation was computed. [2021-10-21 20:05:42,977 INFO L853 garLoopResultBuilder]: At program point L183(lines 31 184) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 3) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-10-21 20:05:42,977 INFO L857 garLoopResultBuilder]: For program point L43(lines 43 160) no Hoare annotation was computed. [2021-10-21 20:05:42,984 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:05:43,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:05:43 BoogieIcfgContainer [2021-10-21 20:05:43,016 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:05:43,016 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:05:43,016 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:05:43,016 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:05:43,017 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:02:54" (3/4) ... [2021-10-21 20:05:43,020 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:05:43,042 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-21 20:05:43,042 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 20:05:43,042 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:05:43,042 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:05:43,095 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:05:43,095 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:05:43,097 INFO L168 Benchmark]: Toolchain (without parser) took 169192.90 ms. Allocated memory was 86.0 MB in the beginning and 589.3 MB in the end (delta: 503.3 MB). Free memory was 49.4 MB in the beginning and 172.3 MB in the end (delta: -122.9 MB). Peak memory consumption was 380.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:43,097 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory was 65.6 MB in the beginning and 65.5 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:43,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.22 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 49.2 MB in the beginning and 86.7 MB in the end (delta: -37.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:43,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.57 ms. Allocated memory is still 111.1 MB. Free memory was 86.7 MB in the beginning and 85.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:43,099 INFO L168 Benchmark]: Boogie Preprocessor took 46.78 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 84.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:43,099 INFO L168 Benchmark]: RCFGBuilder took 446.95 ms. Allocated memory is still 111.1 MB. Free memory was 84.0 MB in the beginning and 72.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:43,100 INFO L168 Benchmark]: TraceAbstraction took 168232.14 ms. Allocated memory was 111.1 MB in the beginning and 589.3 MB in the end (delta: 478.2 MB). Free memory was 72.0 MB in the beginning and 176.5 MB in the end (delta: -104.4 MB). Peak memory consumption was 376.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:43,101 INFO L168 Benchmark]: Witness Printer took 79.44 ms. Allocated memory is still 589.3 MB. Free memory was 176.5 MB in the beginning and 172.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:43,103 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory was 65.6 MB in the beginning and 65.5 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.22 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 49.2 MB in the beginning and 86.7 MB in the end (delta: -37.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.57 ms. Allocated memory is still 111.1 MB. Free memory was 86.7 MB in the beginning and 85.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.78 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 84.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 446.95 ms. Allocated memory is still 111.1 MB. Free memory was 84.0 MB in the beginning and 72.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 168232.14 ms. Allocated memory was 111.1 MB in the beginning and 589.3 MB in the end (delta: 478.2 MB). Free memory was 72.0 MB in the beginning and 176.5 MB in the end (delta: -104.4 MB). Peak memory consumption was 376.3 MB. Max. memory is 16.1 GB. * Witness Printer took 79.44 ms. Allocated memory is still 589.3 MB. Free memory was 176.5 MB in the beginning and 172.3 MB in the end (delta: 4.2 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 - PositiveResult [Line: 96]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 168120.4ms, OverallIterations: 62, TraceHistogramMax: 92, EmptinessCheckTime: 93.6ms, AutomataDifference: 13589.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1380.7ms, InitialAbstractionConstructionTime: 13.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 532 SDtfs, 3607 SDslu, 4483 SDs, 0 SdLazy, 11877 SolverSat, 5439 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7746.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8954 GetRequests, 6141 SyntacticMatches, 6 SemanticMatches, 2807 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3035 ImplicationChecksByTransitivity, 70277.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=61, InterpolantAutomatonStates: 2897, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 458.2ms AutomataMinimizationTime, 62 MinimizatonAttempts, 28 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 10 LocationsWithAnnotation, 10 PreInvPairs, 111 NumberOfFragments, 739 HoareAnnotationTreeSize, 10 FomulaSimplifications, 592 FormulaSimplificationTreeSizeReduction, 169.8ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 325 FormulaSimplificationTreeSizeReductionInter, 1199.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 598.0ms SsaConstructionTime, 4636.9ms SatisfiabilityAnalysisTime, 95385.6ms InterpolantComputationTime, 13187 NumberOfCodeBlocks, 13127 NumberOfCodeBlocksAsserted, 1399 NumberOfCheckSat, 13072 ConstructedInterpolants, 0 QuantifiedInterpolants, 32953 SizeOfPredicates, 2 NumberOfNonLiveVariables, 17099 ConjunctsInSsa, 2131 ConjunctsInUnsatCore, 115 InterpolantComputations, 9 PerfectInterpolantSequences, 138585/345523 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 3) && main__y <= 50 - InvariantResult [Line: 67]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((main__y <= 62 && main__x < 63) && 62 <= main__x) && 62 <= main__y) || (((51 <= main__y && main__y <= 51) && 51 <= main__x) && main__x <= 51)) || (((63 <= main__y && main__x < 64) && main__y <= 63) && 63 <= main__x)) || (((57 <= main__y && 57 <= main__x) && main__x <= 57) && main__y <= 57)) || (((94 <= main__x && main__y <= 94) && main__x <= 94) && 94 <= main__y)) || (((main__y <= 83 && main__x <= 83) && 83 <= main__x) && 83 <= main__y)) || (((89 <= main__x && main__y <= 89) && 89 <= main__y) && main__x <= 89)) || (((60 <= main__x && main__y <= 60) && 60 <= main__y) && main__x <= 60)) || (((main__y <= 56 && 56 <= main__y) && 56 <= main__x) && main__x <= 56)) || (((main__x <= 88 && main__y <= 88) && 88 <= main__x) && 88 <= main__y)) || (((85 <= main__x && 85 <= main__y) && main__x <= 85) && main__y <= 85)) || (((main__x < 70 && 69 <= main__y) && main__y <= 69) && 69 <= main__x)) || (((main__y <= 59 && main__x <= 59) && 59 <= main__x) && 59 <= main__y)) || (((93 <= main__x && main__x <= 93) && main__y <= 93) && 93 <= main__y)) || (((70 <= main__y && main__x < 71) && main__y <= 70) && 70 <= main__x)) || (((67 <= main__x && 67 <= main__y) && main__y <= 67) && main__x < 68)) || (((95 <= main__x && main__y <= 95) && main__x <= 95) && 95 <= main__y)) || (((main__x <= 72 && main__y <= 72) && 72 <= main__y) && 72 <= main__x)) || (((81 <= main__x && main__y <= 81) && 81 <= main__y) && main__x < 82)) || ((100 <= main__x && main__y <= 100) && 99 < main__y)) || (((97 <= main__y && main__y <= 97) && main__x <= 97) && 97 <= main__x)) || ((50 <= main__y && main__x <= 50) && main__y <= 50)) || (((91 <= main__y && main__x <= 91) && 91 <= main__x) && main__y <= 91)) || (((main__y <= 52 && 52 <= main__y) && 52 <= main__x) && main__x <= 52)) || (((77 <= main__x && 77 <= main__y) && main__y <= 77) && main__x < 78)) || (((98 <= main__y && 98 <= main__x) && main__x <= 98) && main__y <= 98)) || (((82 <= main__y && 82 <= main__x) && main__y <= 82) && main__x < 83)) || (((96 <= main__y && main__x <= 96) && 96 <= main__x) && main__y <= 96)) || (((65 <= main__x && main__x <= 65) && main__y <= 65) && 65 <= main__y)) || (((61 <= main__x && 61 <= main__y) && main__x <= 61) && main__y <= 61)) || (((main__x <= 75 && main__y <= 75) && 75 <= main__y) && 75 <= main__x)) || (((54 <= main__x && 54 <= main__y) && main__y <= 54) && main__x < 55)) || (((66 <= main__x && 66 <= main__y) && main__x < 67) && main__y <= 66)) || (((main__y <= 78 && 78 <= main__x) && main__x <= 78) && 78 <= main__y)) || (((53 <= main__x && main__y <= 53) && 53 <= main__y) && main__x < 54)) || (((main__y <= 68 && main__x <= 68) && 68 <= main__x) && 68 <= main__y)) || (((main__x <= 86 && main__y <= 86) && 86 <= main__x) && 86 <= main__y)) || (((main__x < 77 && 76 <= main__x) && main__y <= 76) && 76 <= main__y)) || (((99 <= main__y && main__y <= 99) && 99 <= main__x) && main__x <= 99)) || (((79 <= main__y && 79 <= main__x) && main__x <= 79) && main__y <= 79)) || (((90 <= main__x && 90 <= main__y) && main__y <= 90) && main__x <= 90)) || (((58 <= main__x && main__y <= 58) && main__x < 59) && 58 <= main__y)) || (((main__x <= 87 && main__y <= 87) && 87 <= main__y) && 87 <= main__x)) || (((71 <= main__x && main__y <= 71) && 71 <= main__y) && main__x <= 71)) || (((64 <= main__x && 64 <= main__y) && main__y <= 64) && main__x < 65)) || (((main__x <= 92 && main__y <= 92) && 92 <= main__x) && 92 <= main__y)) || (((73 <= main__y && 73 <= main__x) && main__x <= 73) && main__y <= 73)) || (((main__y <= 74 && 74 <= main__x) && main__x <= 74) && 74 <= main__y)) || (((main__y <= 80 && 80 <= main__x) && main__x <= 80) && 80 <= main__y)) || (((84 <= main__y && main__x <= 84) && 84 <= main__x) && main__y <= 84)) || (((main__y <= 55 && main__x <= 55) && 55 <= main__y) && 55 <= main__x) - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 7) && main__y <= 50 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (main__x <= 1 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (main__x <= 2 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 61]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 8) && main__y <= 50 - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 5) && main__y <= 50 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (main__x <= 6 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 4) && main__y <= 50 RESULT: Ultimate proved your program to be correct! [2021-10-21 20:05:43,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a008a21-d65b-4dce-8435-deed691a1441/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...