./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o200.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o200.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX --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 d03bd1f663815b2d7649a36366d573d68ceb56233e8a1c24e8a8623e8a524f12 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:32:38,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:32:38,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:32:38,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:32:38,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:32:38,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:32:38,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:32:38,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:32:38,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:32:38,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:32:38,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:32:38,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:32:38,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:32:38,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:32:38,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:32:38,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:32:38,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:32:38,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:32:38,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:32:38,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:32:38,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:32:38,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:32:38,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:32:38,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:32:38,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:32:38,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:32:38,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:32:38,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:32:38,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:32:38,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:32:38,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:32:38,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:32:38,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:32:38,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:32:38,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:32:38,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:32:38,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:32:38,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:32:38,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:32:38,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:32:38,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:32:38,733 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:32:38,791 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:32:38,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:32:38,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:32:38,792 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:32:38,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:32:38,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:32:38,793 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:32:38,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:32:38,796 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:32:38,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:32:38,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:32:38,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:32:38,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:32:38,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:32:38,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:32:38,798 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:32:38,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:32:38,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:32:38,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:32:38,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:32:38,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:32:38,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:32:38,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:38,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:32:38,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:32:38,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:32:38,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:32:38,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:32:38,802 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:32:38,803 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:32:38,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:32:38,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:32:38,804 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_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03bd1f663815b2d7649a36366d573d68ceb56233e8a1c24e8a8623e8a524f12 [2021-11-09 09:32:39,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:32:39,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:32:39,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:32:39,217 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:32:39,218 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:32:39,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/recursive-simple/id_o200.c [2021-11-09 09:32:39,308 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/data/ebb1f14c3/c3de0dc2bdb848afa997466eb818b60c/FLAG7f7c515ac [2021-11-09 09:32:39,899 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:32:39,900 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/sv-benchmarks/c/recursive-simple/id_o200.c [2021-11-09 09:32:39,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/data/ebb1f14c3/c3de0dc2bdb848afa997466eb818b60c/FLAG7f7c515ac [2021-11-09 09:32:40,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/data/ebb1f14c3/c3de0dc2bdb848afa997466eb818b60c [2021-11-09 09:32:40,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:32:40,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:32:40,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:40,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:32:40,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:32:40,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362f6e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40, skipping insertion in model container [2021-11-09 09:32:40,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:32:40,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:32:40,493 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_fc3722f8-35fe-4399-b05a-78329bf34b53/sv-benchmarks/c/recursive-simple/id_o200.c[518,531] [2021-11-09 09:32:40,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:40,510 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:32:40,529 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_fc3722f8-35fe-4399-b05a-78329bf34b53/sv-benchmarks/c/recursive-simple/id_o200.c[518,531] [2021-11-09 09:32:40,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:40,547 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:32:40,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40 WrapperNode [2021-11-09 09:32:40,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:40,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:40,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:32:40,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:32:40,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:40,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:32:40,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:32:40,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:32:40,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:32:40,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:32:40,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:32:40,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:32:40,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40" (1/1) ... [2021-11-09 09:32:40,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:40,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:40,683 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:32:40,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:32:40,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:32:40,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:32:40,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:32:40,745 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-11-09 09:32:40,745 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-11-09 09:32:40,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:32:41,000 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:32:41,000 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 09:32:41,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:41 BoogieIcfgContainer [2021-11-09 09:32:41,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:32:41,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:32:41,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:32:41,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:32:41,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:32:40" (1/3) ... [2021-11-09 09:32:41,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab133de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:41, skipping insertion in model container [2021-11-09 09:32:41,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:40" (2/3) ... [2021-11-09 09:32:41,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab133de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:41, skipping insertion in model container [2021-11-09 09:32:41,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:41" (3/3) ... [2021-11-09 09:32:41,016 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o200.c [2021-11-09 09:32:41,023 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:32:41,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:32:41,092 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:32:41,103 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 [2021-11-09 09:32:41,103 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:32:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:32:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:32:41,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:41,134 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:41,134 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:41,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:41,150 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-11-09 09:32:41,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:41,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879909952] [2021-11-09 09:32:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:41,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:41,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:41,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:41,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879909952] [2021-11-09 09:32:41,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879909952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:41,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:41,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:32:41,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422702924] [2021-11-09 09:32:41,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:32:41,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:41,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:32:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:41,581 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:41,639 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-11-09 09:32:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:32:41,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-09 09:32:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:41,660 INFO L225 Difference]: With dead ends: 28 [2021-11-09 09:32:41,660 INFO L226 Difference]: Without dead ends: 15 [2021-11-09 09:32:41,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-09 09:32:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-09 09:32:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:32:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-09 09:32:41,706 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-11-09 09:32:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:41,707 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-09 09:32:41,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-09 09:32:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 09:32:41,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:41,710 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:41,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:32:41,710 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:41,711 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-11-09 09:32:41,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:41,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825083365] [2021-11-09 09:32:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:41,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:41,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:41,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:32:41,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:41,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825083365] [2021-11-09 09:32:41,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825083365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:41,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090711905] [2021-11-09 09:32:41,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:41,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:41,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:42,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:42,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:32:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:32:42,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:32:42,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090711905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:42,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:42,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-09 09:32:42,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287249798] [2021-11-09 09:32:42,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:32:42,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:42,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:32:42,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:32:42,474 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:32:42,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:42,512 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-09 09:32:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:32:42,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-09 09:32:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:42,514 INFO L225 Difference]: With dead ends: 22 [2021-11-09 09:32:42,514 INFO L226 Difference]: Without dead ends: 18 [2021-11-09 09:32:42,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:32:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-09 09:32:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-09 09:32:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 09:32:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-09 09:32:42,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-11-09 09:32:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:42,522 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-09 09:32:42,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:32:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-09 09:32:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:32:42,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:42,524 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:42,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:42,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-09 09:32:42,746 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:42,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:42,747 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-11-09 09:32:42,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:42,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066337944] [2021-11-09 09:32:42,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:42,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:42,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:32:43,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:43,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066337944] [2021-11-09 09:32:43,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066337944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:43,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520915512] [2021-11-09 09:32:43,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:32:43,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:43,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:43,146 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:43,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:32:43,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:32:43,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:43,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:32:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:32:43,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520915512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:43,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:43,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 09:32:43,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146828315] [2021-11-09 09:32:43,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:32:43,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:43,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:32:43,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:32:43,496 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:32:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:43,556 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-09 09:32:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:32:43,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-11-09 09:32:43,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:43,560 INFO L225 Difference]: With dead ends: 25 [2021-11-09 09:32:43,561 INFO L226 Difference]: Without dead ends: 21 [2021-11-09 09:32:43,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:32:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-09 09:32:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-09 09:32:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-09 09:32:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-09 09:32:43,575 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-11-09 09:32:43,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:43,576 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-09 09:32:43,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:32:43,576 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-09 09:32:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:32:43,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:43,578 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:43,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:43,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:43,779 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:43,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-11-09 09:32:43,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:43,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733348814] [2021-11-09 09:32:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:43,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 09:32:44,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:44,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733348814] [2021-11-09 09:32:44,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733348814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:44,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570826381] [2021-11-09 09:32:44,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:32:44,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:44,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:44,091 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:44,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:32:44,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:32:44,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:44,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:32:44,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 09:32:44,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570826381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:44,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:44,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 09:32:44,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698375870] [2021-11-09 09:32:44,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:32:44,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:32:44,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:32:44,442 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-09 09:32:44,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:44,496 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-09 09:32:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:32:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-11-09 09:32:44,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:44,501 INFO L225 Difference]: With dead ends: 28 [2021-11-09 09:32:44,501 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 09:32:44,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:32:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 09:32:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-09 09:32:44,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-09 09:32:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-09 09:32:44,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-11-09 09:32:44,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:44,516 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-09 09:32:44,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-09 09:32:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-09 09:32:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 09:32:44,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:44,525 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:44,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-09 09:32:44,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:44,738 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-11-09 09:32:44,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:44,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702027155] [2021-11-09 09:32:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:44,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-09 09:32:45,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:45,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702027155] [2021-11-09 09:32:45,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702027155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:45,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75506985] [2021-11-09 09:32:45,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:32:45,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:45,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:45,018 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:45,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:32:45,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:32:45,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:45,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:32:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-09 09:32:45,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75506985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:45,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:45,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-09 09:32:45,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386833482] [2021-11-09 09:32:45,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:32:45,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:45,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:32:45,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:32:45,350 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 09:32:45,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:45,415 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-09 09:32:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:32:45,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-11-09 09:32:45,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:45,418 INFO L225 Difference]: With dead ends: 31 [2021-11-09 09:32:45,419 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 09:32:45,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:32:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 09:32:45,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-09 09:32:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-09 09:32:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-09 09:32:45,435 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-11-09 09:32:45,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:45,436 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-09 09:32:45,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 09:32:45,437 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-09 09:32:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:32:45,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:45,441 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:45,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:45,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:45,662 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-11-09 09:32:45,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:45,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774663519] [2021-11-09 09:32:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:45,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-09 09:32:45,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:45,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774663519] [2021-11-09 09:32:45,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774663519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:45,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442805177] [2021-11-09 09:32:45,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:32:45,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:45,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:45,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:46,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:32:46,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:32:46,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:46,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:32:46,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-09 09:32:46,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442805177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:46,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:46,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 09:32:46,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587555547] [2021-11-09 09:32:46,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:32:46,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:32:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:32:46,380 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-09 09:32:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:46,472 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-09 09:32:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:32:46,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2021-11-09 09:32:46,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:46,474 INFO L225 Difference]: With dead ends: 34 [2021-11-09 09:32:46,474 INFO L226 Difference]: Without dead ends: 30 [2021-11-09 09:32:46,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:32:46,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-09 09:32:46,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-09 09:32:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-09 09:32:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-09 09:32:46,480 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-11-09 09:32:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:46,481 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-09 09:32:46,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-09 09:32:46,481 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-09 09:32:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 09:32:46,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:46,483 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:46,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:46,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:46,702 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:46,702 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-11-09 09:32:46,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:46,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877337320] [2021-11-09 09:32:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:46,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:46,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:46,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:46,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:46,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:46,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:47,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:47,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 09:32:47,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:47,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877337320] [2021-11-09 09:32:47,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877337320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:47,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747729328] [2021-11-09 09:32:47,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:32:47,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:47,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:47,110 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:47,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:32:47,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:32:47,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:47,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:32:47,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 09:32:47,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747729328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:47,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:47,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 09:32:47,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59931722] [2021-11-09 09:32:47,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:32:47,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:47,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:32:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:32:47,524 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-09 09:32:47,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:47,623 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-11-09 09:32:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:32:47,624 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) Word has length 46 [2021-11-09 09:32:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:47,628 INFO L225 Difference]: With dead ends: 37 [2021-11-09 09:32:47,628 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 09:32:47,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:32:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 09:32:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-09 09:32:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-09 09:32:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-09 09:32:47,637 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-11-09 09:32:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:47,637 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-09 09:32:47,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-09 09:32:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-09 09:32:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 09:32:47,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:47,639 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:47,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:47,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:47,847 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:47,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:47,847 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-11-09 09:32:47,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:47,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3640204] [2021-11-09 09:32:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:47,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:47,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:47,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:48,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:48,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:48,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:48,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:48,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:48,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-09 09:32:48,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:48,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3640204] [2021-11-09 09:32:48,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3640204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:48,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712595852] [2021-11-09 09:32:48,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:32:48,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:48,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:48,302 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:48,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:32:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:32:48,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-09 09:32:48,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712595852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:48,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:48,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-09 09:32:48,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930195060] [2021-11-09 09:32:48,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:32:48,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:48,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:32:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:32:48,748 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-09 09:32:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:48,869 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-09 09:32:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:32:48,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 52 [2021-11-09 09:32:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:48,873 INFO L225 Difference]: With dead ends: 40 [2021-11-09 09:32:48,873 INFO L226 Difference]: Without dead ends: 36 [2021-11-09 09:32:48,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:32:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-09 09:32:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-09 09:32:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-09 09:32:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-09 09:32:48,884 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-11-09 09:32:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:48,886 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-09 09:32:48,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-09 09:32:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-09 09:32:48,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:32:48,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:48,890 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:48,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:49,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 09:32:49,106 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:49,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:49,107 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-11-09 09:32:49,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:49,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977460986] [2021-11-09 09:32:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:49,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 09:32:49,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:49,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977460986] [2021-11-09 09:32:49,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977460986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:49,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164228547] [2021-11-09 09:32:49,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:32:49,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:49,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:49,586 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:49,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:32:49,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:32:49,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:49,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:32:49,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 09:32:50,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164228547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:50,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:50,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-09 09:32:50,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793142880] [2021-11-09 09:32:50,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:32:50,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:50,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:32:50,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:32:50,105 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-09 09:32:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:50,250 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-09 09:32:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:32:50,250 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) Word has length 58 [2021-11-09 09:32:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:50,252 INFO L225 Difference]: With dead ends: 43 [2021-11-09 09:32:50,252 INFO L226 Difference]: Without dead ends: 39 [2021-11-09 09:32:50,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:32:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-09 09:32:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-09 09:32:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-09 09:32:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-09 09:32:50,258 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-11-09 09:32:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:50,258 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-09 09:32:50,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-09 09:32:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-09 09:32:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 09:32:50,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:50,260 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:50,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:50,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:50,486 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:50,486 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-11-09 09:32:50,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:50,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027324010] [2021-11-09 09:32:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:50,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:51,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-09 09:32:51,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:51,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027324010] [2021-11-09 09:32:51,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027324010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:51,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002855244] [2021-11-09 09:32:51,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:32:51,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:51,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:51,042 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:51,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:32:51,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 09:32:51,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:51,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 09:32:51,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-09 09:32:51,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002855244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:51,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:51,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 09:32:51,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082616146] [2021-11-09 09:32:51,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:32:51,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:51,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:32:51,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:32:51,779 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-09 09:32:51,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:51,977 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-09 09:32:51,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:32:51,978 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 64 [2021-11-09 09:32:51,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:51,979 INFO L225 Difference]: With dead ends: 46 [2021-11-09 09:32:51,979 INFO L226 Difference]: Without dead ends: 42 [2021-11-09 09:32:51,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:32:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-09 09:32:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-09 09:32:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-09 09:32:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-09 09:32:51,984 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-11-09 09:32:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:51,985 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-09 09:32:51,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-09 09:32:51,985 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-09 09:32:51,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 09:32:51,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:51,993 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:52,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:52,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:52,197 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:52,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:52,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-11-09 09:32:52,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:52,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048605570] [2021-11-09 09:32:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:52,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-09 09:32:52,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:52,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048605570] [2021-11-09 09:32:52,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048605570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:52,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842312090] [2021-11-09 09:32:52,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:32:52,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:52,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:52,822 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:52,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:32:53,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:32:53,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:53,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 09:32:53,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-09 09:32:53,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842312090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:53,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:53,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-09 09:32:53,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185216689] [2021-11-09 09:32:53,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:32:53,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:53,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:32:53,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:32:53,503 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-09 09:32:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:53,706 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-09 09:32:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:32:53,706 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 70 [2021-11-09 09:32:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:53,707 INFO L225 Difference]: With dead ends: 49 [2021-11-09 09:32:53,707 INFO L226 Difference]: Without dead ends: 45 [2021-11-09 09:32:53,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:32:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-09 09:32:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-09 09:32:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-09 09:32:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-09 09:32:53,713 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-11-09 09:32:53,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:53,714 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-09 09:32:53,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-09 09:32:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-09 09:32:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 09:32:53,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:53,716 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:53,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:53,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:53,917 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-11-09 09:32:53,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:53,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927715882] [2021-11-09 09:32:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:53,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:53,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 09:32:54,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:54,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927715882] [2021-11-09 09:32:54,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927715882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:54,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556560456] [2021-11-09 09:32:54,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:32:54,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:54,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:54,630 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:54,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:32:55,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-09 09:32:55,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:55,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 09:32:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 09:32:55,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556560456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:55,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:55,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-09 09:32:55,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949188575] [2021-11-09 09:32:55,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:32:55,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:55,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:32:55,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:32:55,776 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-09 09:32:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:56,016 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-09 09:32:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:32:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) Word has length 76 [2021-11-09 09:32:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:56,018 INFO L225 Difference]: With dead ends: 52 [2021-11-09 09:32:56,018 INFO L226 Difference]: Without dead ends: 48 [2021-11-09 09:32:56,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:32:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-09 09:32:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-09 09:32:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-09 09:32:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-09 09:32:56,024 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-11-09 09:32:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:56,024 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-09 09:32:56,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-09 09:32:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-09 09:32:56,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 09:32:56,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:56,026 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:56,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:56,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:56,235 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:56,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-11-09 09:32:56,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:56,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117270981] [2021-11-09 09:32:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:56,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-09 09:32:57,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:57,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117270981] [2021-11-09 09:32:57,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117270981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:57,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57261356] [2021-11-09 09:32:57,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:32:57,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:57,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:57,015 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:57,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:32:57,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 09:32:57,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:57,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 09:32:57,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-09 09:32:58,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57261356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:58,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:58,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-09 09:32:58,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634610342] [2021-11-09 09:32:58,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:32:58,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:58,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:32:58,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:32:58,113 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-09 09:32:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:58,364 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-11-09 09:32:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:32:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 82 [2021-11-09 09:32:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:58,366 INFO L225 Difference]: With dead ends: 55 [2021-11-09 09:32:58,366 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 09:32:58,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:32:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 09:32:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-09 09:32:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-09 09:32:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-09 09:32:58,373 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-11-09 09:32:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:58,374 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-09 09:32:58,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-09 09:32:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-09 09:32:58,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-09 09:32:58,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:58,375 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:58,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:58,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:32:58,581 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:58,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-11-09 09:32:58,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:58,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770620014] [2021-11-09 09:32:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:58,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:59,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:59,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:59,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:59,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:59,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:59,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:59,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:32:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-09 09:32:59,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:59,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770620014] [2021-11-09 09:32:59,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770620014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:59,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626800737] [2021-11-09 09:32:59,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:32:59,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:59,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:59,474 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:59,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:32:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 09:32:59,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-09 09:33:00,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626800737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:00,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:00,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-09 09:33:00,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258940438] [2021-11-09 09:33:00,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:33:00,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:00,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:33:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:33:00,266 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 32 states, 32 states have (on average 1.15625) internal successors, (37), 18 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-09 09:33:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:00,579 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-11-09 09:33:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 09:33:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 18 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) Word has length 88 [2021-11-09 09:33:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:00,581 INFO L225 Difference]: With dead ends: 58 [2021-11-09 09:33:00,581 INFO L226 Difference]: Without dead ends: 54 [2021-11-09 09:33:00,582 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:33:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-09 09:33:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-09 09:33:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-09 09:33:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-09 09:33:00,587 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-11-09 09:33:00,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:00,587 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-09 09:33:00,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 18 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-09 09:33:00,588 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-09 09:33:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 09:33:00,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:00,589 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:00,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:00,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:33:00,810 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:00,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:00,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-11-09 09:33:00,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:00,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734815202] [2021-11-09 09:33:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:00,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:00,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:00,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:00,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 09:33:01,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:01,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734815202] [2021-11-09 09:33:01,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734815202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:01,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068777084] [2021-11-09 09:33:01,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:33:01,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:01,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:01,756 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:01,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:33:02,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:33:02,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 09:33:02,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 09:33:02,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068777084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:02,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:02,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-09 09:33:02,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187892467] [2021-11-09 09:33:02,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 09:33:02,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:02,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 09:33:02,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:33:02,609 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-09 09:33:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:02,953 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-11-09 09:33:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:33:02,954 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) Word has length 94 [2021-11-09 09:33:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:02,955 INFO L225 Difference]: With dead ends: 61 [2021-11-09 09:33:02,955 INFO L226 Difference]: Without dead ends: 57 [2021-11-09 09:33:02,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:33:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-09 09:33:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-09 09:33:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-09 09:33:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-11-09 09:33:02,968 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-11-09 09:33:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:02,968 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-11-09 09:33:02,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-09 09:33:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-11-09 09:33:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-09 09:33:02,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:02,970 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:02,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:03,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:33:03,174 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-11-09 09:33:03,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:03,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689911809] [2021-11-09 09:33:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:03,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:04,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:04,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:04,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-09 09:33:04,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:04,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689911809] [2021-11-09 09:33:04,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689911809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:04,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546906590] [2021-11-09 09:33:04,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:33:04,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:04,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:04,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:04,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:33:05,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-09 09:33:05,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:05,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 09:33:05,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-09 09:33:05,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546906590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:05,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:05,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-09 09:33:05,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143234153] [2021-11-09 09:33:05,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 09:33:05,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:05,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 09:33:05,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:33:05,595 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 20 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-09 09:33:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:06,001 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-11-09 09:33:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 09:33:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 20 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 100 [2021-11-09 09:33:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:06,003 INFO L225 Difference]: With dead ends: 64 [2021-11-09 09:33:06,003 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 09:33:06,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:33:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 09:33:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-09 09:33:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-09 09:33:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-11-09 09:33:06,009 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-11-09 09:33:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:06,009 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-11-09 09:33:06,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 20 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-09 09:33:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-11-09 09:33:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 09:33:06,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:06,014 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:06,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:06,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:06,214 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:06,215 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-11-09 09:33:06,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:06,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957976380] [2021-11-09 09:33:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:06,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:06,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:06,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:06,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:06,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:06,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:06,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:06,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:06,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:06,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:06,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:06,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:07,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:07,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:07,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:07,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:07,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:07,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-09 09:33:07,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:07,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957976380] [2021-11-09 09:33:07,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957976380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:07,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897984916] [2021-11-09 09:33:07,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:33:07,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:07,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:07,486 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:07,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:33:08,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:33:08,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:08,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 09:33:08,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-09 09:33:08,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897984916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:08,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:08,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-09 09:33:08,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499887800] [2021-11-09 09:33:08,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:33:08,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:33:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:33:08,665 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-09 09:33:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:09,114 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-11-09 09:33:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 09:33:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) Word has length 106 [2021-11-09 09:33:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:09,116 INFO L225 Difference]: With dead ends: 67 [2021-11-09 09:33:09,116 INFO L226 Difference]: Without dead ends: 63 [2021-11-09 09:33:09,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:33:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-09 09:33:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-09 09:33:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-09 09:33:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-11-09 09:33:09,123 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-11-09 09:33:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:09,123 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-11-09 09:33:09,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-09 09:33:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-11-09 09:33:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-09 09:33:09,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:09,125 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:09,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:09,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:33:09,326 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:09,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-11-09 09:33:09,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:09,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884677356] [2021-11-09 09:33:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:09,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 09:33:10,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:10,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884677356] [2021-11-09 09:33:10,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884677356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:10,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65546870] [2021-11-09 09:33:10,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:33:10,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:10,623 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:10,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:33:12,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-09 09:33:12,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:12,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-09 09:33:12,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 09:33:12,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65546870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:12,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:12,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-09 09:33:12,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485458375] [2021-11-09 09:33:12,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 09:33:12,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 09:33:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:33:12,668 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 40 states, 40 states have (on average 1.125) internal successors, (45), 22 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-09 09:33:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:13,176 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-09 09:33:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 09:33:13,177 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.125) internal successors, (45), 22 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) Word has length 112 [2021-11-09 09:33:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:13,178 INFO L225 Difference]: With dead ends: 70 [2021-11-09 09:33:13,178 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 09:33:13,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:33:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 09:33:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-09 09:33:13,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-09 09:33:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-09 09:33:13,188 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-11-09 09:33:13,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:13,188 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-09 09:33:13,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.125) internal successors, (45), 22 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-09 09:33:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-09 09:33:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-09 09:33:13,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:13,190 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:13,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:13,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:33:13,397 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-11-09 09:33:13,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:13,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006751650] [2021-11-09 09:33:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:13,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:13,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:13,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:13,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:13,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:13,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:13,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:13,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:13,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-09 09:33:14,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:14,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006751650] [2021-11-09 09:33:14,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006751650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:14,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946663807] [2021-11-09 09:33:14,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:33:14,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:14,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:14,914 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:14,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:33:16,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-09 09:33:16,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-09 09:33:16,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-09 09:33:16,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946663807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:16,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:16,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-09 09:33:16,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938708270] [2021-11-09 09:33:16,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 09:33:16,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:16,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 09:33:16,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 09:33:16,966 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 23 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-09 09:33:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:17,477 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-11-09 09:33:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 09:33:17,477 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 23 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) Word has length 118 [2021-11-09 09:33:17,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:17,478 INFO L225 Difference]: With dead ends: 73 [2021-11-09 09:33:17,478 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 09:33:17,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 09:33:17,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 09:33:17,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-09 09:33:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-09 09:33:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-11-09 09:33:17,484 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-11-09 09:33:17,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:17,484 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-11-09 09:33:17,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 23 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-09 09:33:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-11-09 09:33:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-09 09:33:17,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:17,487 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:17,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:17,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:17,693 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:17,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:17,694 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-11-09 09:33:17,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:17,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547444669] [2021-11-09 09:33:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:17,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:17,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:17,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:17,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:17,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:19,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:19,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-11-09 09:33:19,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:19,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547444669] [2021-11-09 09:33:19,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547444669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:19,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132058629] [2021-11-09 09:33:19,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:33:19,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:19,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:19,213 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:19,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:33:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:19,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-09 09:33:19,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-11-09 09:33:20,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132058629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:20,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:20,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-11-09 09:33:20,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128190262] [2021-11-09 09:33:20,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 09:33:20,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:20,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 09:33:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:33:20,361 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-09 09:33:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:20,896 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-11-09 09:33:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 09:33:20,897 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) Word has length 124 [2021-11-09 09:33:20,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:20,898 INFO L225 Difference]: With dead ends: 76 [2021-11-09 09:33:20,898 INFO L226 Difference]: Without dead ends: 72 [2021-11-09 09:33:20,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:33:20,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-09 09:33:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-09 09:33:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-09 09:33:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-11-09 09:33:20,905 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-11-09 09:33:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:20,906 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-11-09 09:33:20,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-09 09:33:20,906 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-11-09 09:33:20,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-09 09:33:20,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:20,908 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:20,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:21,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-09 09:33:21,121 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:21,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-11-09 09:33:21,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:21,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143487006] [2021-11-09 09:33:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:21,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:22,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:22,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:22,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:22,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:22,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:22,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:22,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:22,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:22,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-11-09 09:33:22,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:22,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143487006] [2021-11-09 09:33:22,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143487006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:22,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021108484] [2021-11-09 09:33:22,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:33:22,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:22,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:22,790 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:22,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:33:23,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:33:23,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:23,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-09 09:33:23,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-11-09 09:33:24,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021108484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:24,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:24,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-09 09:33:24,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864283513] [2021-11-09 09:33:24,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 09:33:24,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 09:33:24,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:33:24,123 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 25 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-09 09:33:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:24,690 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-11-09 09:33:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 09:33:24,690 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 25 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) Word has length 130 [2021-11-09 09:33:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:24,692 INFO L225 Difference]: With dead ends: 79 [2021-11-09 09:33:24,692 INFO L226 Difference]: Without dead ends: 75 [2021-11-09 09:33:24,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:33:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-09 09:33:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-09 09:33:24,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-09 09:33:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-11-09 09:33:24,698 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-11-09 09:33:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:24,698 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-11-09 09:33:24,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 25 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-09 09:33:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-11-09 09:33:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-09 09:33:24,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:24,700 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:24,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:24,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 09:33:24,914 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:24,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:24,914 INFO L85 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-11-09 09:33:24,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:24,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926692042] [2021-11-09 09:33:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:24,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:26,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:26,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:26,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:26,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:26,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:26,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:26,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:26,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-09 09:33:26,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:26,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926692042] [2021-11-09 09:33:26,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926692042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:26,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175887215] [2021-11-09 09:33:26,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:33:26,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:26,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:26,689 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:26,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:33:28,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-09 09:33:28,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:28,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-09 09:33:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-09 09:33:28,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175887215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:28,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:28,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-09 09:33:28,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792945648] [2021-11-09 09:33:28,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 09:33:28,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:28,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 09:33:28,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:33:28,904 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 26 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-09 09:33:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:29,456 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-11-09 09:33:29,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 09:33:29,458 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 26 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) Word has length 136 [2021-11-09 09:33:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:29,459 INFO L225 Difference]: With dead ends: 82 [2021-11-09 09:33:29,459 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 09:33:29,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:33:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 09:33:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-09 09:33:29,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (24), 23 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-09 09:33:29,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-11-09 09:33:29,465 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2021-11-09 09:33:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:29,466 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-11-09 09:33:29,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 26 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-09 09:33:29,466 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-11-09 09:33:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-09 09:33:29,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:29,468 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:29,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:29,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 09:33:29,690 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2021-11-09 09:33:29,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:29,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757557211] [2021-11-09 09:33:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:29,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:29,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:29,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:29,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:31,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:31,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:31,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:31,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:31,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:31,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:31,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-11-09 09:33:31,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:31,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757557211] [2021-11-09 09:33:31,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757557211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:31,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734211923] [2021-11-09 09:33:31,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:33:31,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:31,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:31,562 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:31,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:33:32,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:33:32,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:32,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-09 09:33:32,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-11-09 09:33:32,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734211923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:32,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:32,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-11-09 09:33:32,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601497995] [2021-11-09 09:33:32,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 09:33:32,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:32,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 09:33:32,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:33:32,947 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 50 states, 50 states have (on average 1.1) internal successors, (55), 27 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (23), 23 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-09 09:33:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:33,589 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-11-09 09:33:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-09 09:33:33,590 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.1) internal successors, (55), 27 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (23), 23 states have call predecessors, (23), 1 states have call successors, (23) Word has length 142 [2021-11-09 09:33:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:33,591 INFO L225 Difference]: With dead ends: 85 [2021-11-09 09:33:33,591 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 09:33:33,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:33:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 09:33:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-09 09:33:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-09 09:33:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-11-09 09:33:33,598 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2021-11-09 09:33:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:33,598 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-11-09 09:33:33,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.1) internal successors, (55), 27 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (23), 23 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-09 09:33:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-11-09 09:33:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-09 09:33:33,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:33,614 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:33,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:33,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:33:33,838 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:33,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:33,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2021-11-09 09:33:33,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:33,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112593994] [2021-11-09 09:33:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:33,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:33,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:34,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:35,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:35,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:35,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:35,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:35,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:35,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:35,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:35,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-09 09:33:35,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:35,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112593994] [2021-11-09 09:33:35,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112593994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:35,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416096908] [2021-11-09 09:33:35,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:33:35,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:35,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:35,834 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:35,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:33:44,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-09 09:33:44,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:44,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-09 09:33:44,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-09 09:33:45,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416096908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:45,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:45,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-09 09:33:45,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606197036] [2021-11-09 09:33:45,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 09:33:45,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:45,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 09:33:45,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:33:45,587 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 28 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-09 09:33:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:46,254 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-11-09 09:33:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 09:33:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 28 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) Word has length 148 [2021-11-09 09:33:46,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:46,255 INFO L225 Difference]: With dead ends: 88 [2021-11-09 09:33:46,255 INFO L226 Difference]: Without dead ends: 84 [2021-11-09 09:33:46,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:33:46,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-09 09:33:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-09 09:33:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-09 09:33:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-09 09:33:46,261 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2021-11-09 09:33:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:46,262 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-09 09:33:46,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 28 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-09 09:33:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-09 09:33:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-09 09:33:46,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:46,264 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:46,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-09 09:33:46,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:46,472 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:46,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:46,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2021-11-09 09:33:46,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:46,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371963722] [2021-11-09 09:33:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:46,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:46,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:46,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:46,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:46,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:46,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:46,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:47,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:48,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:48,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:48,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:48,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:48,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:48,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:48,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-11-09 09:33:48,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:48,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371963722] [2021-11-09 09:33:48,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371963722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:48,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201605529] [2021-11-09 09:33:48,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:33:48,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:48,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:48,650 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:48,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:33:50,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-09 09:33:50,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:50,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-09 09:33:50,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-11-09 09:33:51,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201605529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:51,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:51,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-09 09:33:51,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793533860] [2021-11-09 09:33:51,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 09:33:51,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:51,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 09:33:51,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:33:51,580 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-09 09:33:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:52,279 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-11-09 09:33:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 09:33:52,280 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 1 states have call successors, (25) Word has length 154 [2021-11-09 09:33:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:52,281 INFO L225 Difference]: With dead ends: 91 [2021-11-09 09:33:52,282 INFO L226 Difference]: Without dead ends: 87 [2021-11-09 09:33:52,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:33:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-09 09:33:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-09 09:33:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-09 09:33:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-11-09 09:33:52,287 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2021-11-09 09:33:52,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:52,288 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-11-09 09:33:52,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-09 09:33:52,288 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-11-09 09:33:52,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-09 09:33:52,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:52,290 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:52,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:52,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:33:52,498 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2021-11-09 09:33:52,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:52,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259415602] [2021-11-09 09:33:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:52,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:52,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:52,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:52,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:52,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:52,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:52,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:53,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:53,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:53,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:53,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:53,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:53,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:53,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:53,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:53,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:53,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:53,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:54,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:54,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:54,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:54,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:54,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:54,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:54,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:54,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:54,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-11-09 09:33:54,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:54,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259415602] [2021-11-09 09:33:54,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259415602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:54,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109228611] [2021-11-09 09:33:54,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:33:54,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:54,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:54,751 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:54,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:33:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:55,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-09 09:33:55,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-11-09 09:33:56,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109228611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:56,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:56,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-11-09 09:33:56,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839639433] [2021-11-09 09:33:56,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 09:33:56,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:56,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 09:33:56,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 09:33:56,356 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 30 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2021-11-09 09:33:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:57,174 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-11-09 09:33:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-09 09:33:57,175 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 30 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) Word has length 160 [2021-11-09 09:33:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:57,177 INFO L225 Difference]: With dead ends: 94 [2021-11-09 09:33:57,177 INFO L226 Difference]: Without dead ends: 90 [2021-11-09 09:33:57,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 09:33:57,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-09 09:33:57,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-09 09:33:57,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 61 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (28), 27 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-09 09:33:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-11-09 09:33:57,184 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 160 [2021-11-09 09:33:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:57,184 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-11-09 09:33:57,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 30 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2021-11-09 09:33:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-11-09 09:33:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-09 09:33:57,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:57,186 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:57,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:57,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:33:57,404 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:57,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1845527796, now seen corresponding path program 26 times [2021-11-09 09:33:57,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:57,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389003195] [2021-11-09 09:33:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:57,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:57,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:57,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:57,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:57,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:57,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:57,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:58,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:58,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:58,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:58,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:58,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:58,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:58,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:58,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:58,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:58,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:58,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:59,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:59,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:59,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:59,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:59,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:59,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:59,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:59,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:33:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-09 09:33:59,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:59,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389003195] [2021-11-09 09:33:59,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389003195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:59,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209238534] [2021-11-09 09:33:59,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:33:59,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:59,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:59,758 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:59,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:34:00,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:34:00,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:00,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-09 09:34:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-09 09:34:01,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209238534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:01,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:01,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-11-09 09:34:01,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018901901] [2021-11-09 09:34:01,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 09:34:01,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 09:34:01,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:34:01,592 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 31 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-09 09:34:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:02,467 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-11-09 09:34:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-09 09:34:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 31 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 1 states have call successors, (27) Word has length 166 [2021-11-09 09:34:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:02,469 INFO L225 Difference]: With dead ends: 97 [2021-11-09 09:34:02,469 INFO L226 Difference]: Without dead ends: 93 [2021-11-09 09:34:02,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:34:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-09 09:34:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-09 09:34:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 63 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (29), 28 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-09 09:34:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-11-09 09:34:02,476 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 166 [2021-11-09 09:34:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:02,476 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-11-09 09:34:02,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 31 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-09 09:34:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-11-09 09:34:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-09 09:34:02,477 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:02,478 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:02,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:02,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:34:02,678 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:02,679 INFO L85 PathProgramCache]: Analyzing trace with hash 269143318, now seen corresponding path program 27 times [2021-11-09 09:34:02,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:02,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969691136] [2021-11-09 09:34:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:02,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:02,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:02,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:02,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:02,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2021-11-09 09:34:04,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:04,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969691136] [2021-11-09 09:34:04,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969691136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:04,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735996536] [2021-11-09 09:34:04,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:34:04,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:04,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:04,880 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:04,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:34:11,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-09 09:34:11,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:11,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-09 09:34:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2021-11-09 09:34:12,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735996536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:12,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:12,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-09 09:34:12,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515784866] [2021-11-09 09:34:12,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-09 09:34:12,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:12,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-09 09:34:12,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:34:12,039 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 32 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (28), 28 states have call predecessors, (28), 1 states have call successors, (28) [2021-11-09 09:34:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:12,914 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-11-09 09:34:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 09:34:12,915 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 32 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (28), 28 states have call predecessors, (28), 1 states have call successors, (28) Word has length 172 [2021-11-09 09:34:12,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:12,917 INFO L225 Difference]: With dead ends: 100 [2021-11-09 09:34:12,917 INFO L226 Difference]: Without dead ends: 96 [2021-11-09 09:34:12,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:34:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-09 09:34:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-09 09:34:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 64 states have (on average 1.015625) internal successors, (65), 65 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 29 states have return successors, (30), 29 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-09 09:34:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-11-09 09:34:12,923 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 172 [2021-11-09 09:34:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:12,923 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-11-09 09:34:12,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 32 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (28), 28 states have call predecessors, (28), 1 states have call successors, (28) [2021-11-09 09:34:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-11-09 09:34:12,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-09 09:34:12,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:12,925 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:12,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:13,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:34:13,135 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:13,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1279357492, now seen corresponding path program 28 times [2021-11-09 09:34:13,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:13,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191637335] [2021-11-09 09:34:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:13,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:13,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:13,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:13,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:13,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:13,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:13,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:13,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:13,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:13,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:13,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:14,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:15,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:15,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:15,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:15,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:15,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:15,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2021-11-09 09:34:15,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:15,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191637335] [2021-11-09 09:34:15,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191637335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:15,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026550072] [2021-11-09 09:34:15,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:34:15,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:15,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:15,620 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:15,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:34:16,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:34:16,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:16,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-09 09:34:16,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2021-11-09 09:34:17,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026550072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:17,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:17,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-11-09 09:34:17,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305669619] [2021-11-09 09:34:17,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-09 09:34:17,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:17,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-09 09:34:17,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 09:34:17,610 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 33 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 29 states have return successors, (29), 29 states have call predecessors, (29), 1 states have call successors, (29) [2021-11-09 09:34:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:18,595 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2021-11-09 09:34:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 09:34:18,595 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 33 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 29 states have return successors, (29), 29 states have call predecessors, (29), 1 states have call successors, (29) Word has length 178 [2021-11-09 09:34:18,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:18,596 INFO L225 Difference]: With dead ends: 103 [2021-11-09 09:34:18,596 INFO L226 Difference]: Without dead ends: 99 [2021-11-09 09:34:18,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 09:34:18,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-09 09:34:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-09 09:34:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 67 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (31), 30 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-09 09:34:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-11-09 09:34:18,603 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 178 [2021-11-09 09:34:18,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:18,604 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-11-09 09:34:18,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 33 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 29 states have return successors, (29), 29 states have call predecessors, (29), 1 states have call successors, (29) [2021-11-09 09:34:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-11-09 09:34:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-09 09:34:18,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:18,606 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:18,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:18,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:34:18,822 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:18,822 INFO L85 PathProgramCache]: Analyzing trace with hash -790097834, now seen corresponding path program 29 times [2021-11-09 09:34:18,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:18,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147831875] [2021-11-09 09:34:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:18,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:18,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:18,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:19,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:20,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:20,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:20,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:20,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:20,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:20,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:20,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:20,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:20,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:20,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:20,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:21,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:21,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:21,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:21,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-09 09:34:21,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:21,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147831875] [2021-11-09 09:34:21,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147831875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:21,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173041119] [2021-11-09 09:34:21,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:34:21,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:21,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:21,467 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:21,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:34:50,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-09 09:34:50,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:50,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-09 09:34:50,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-09 09:34:51,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173041119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:51,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:51,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-11-09 09:34:51,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259948381] [2021-11-09 09:34:51,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 09:34:51,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:51,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 09:34:51,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:34:51,366 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 64 states, 64 states have (on average 1.078125) internal successors, (69), 34 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (30), 30 states have call predecessors, (30), 1 states have call successors, (30) [2021-11-09 09:34:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:52,409 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2021-11-09 09:34:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 09:34:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.078125) internal successors, (69), 34 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (30), 30 states have call predecessors, (30), 1 states have call successors, (30) Word has length 184 [2021-11-09 09:34:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:52,411 INFO L225 Difference]: With dead ends: 106 [2021-11-09 09:34:52,411 INFO L226 Difference]: Without dead ends: 102 [2021-11-09 09:34:52,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:34:52,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-09 09:34:52,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-09 09:34:52,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 69 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 31 states have return successors, (32), 31 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-09 09:34:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-11-09 09:34:52,416 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 184 [2021-11-09 09:34:52,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:52,417 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-11-09 09:34:52,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.078125) internal successors, (69), 34 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (30), 30 states have call predecessors, (30), 1 states have call successors, (30) [2021-11-09 09:34:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-11-09 09:34:52,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-09 09:34:52,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:52,419 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:52,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:52,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:52,622 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:52,622 INFO L85 PathProgramCache]: Analyzing trace with hash 609702028, now seen corresponding path program 30 times [2021-11-09 09:34:52,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:52,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795899949] [2021-11-09 09:34:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:52,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:52,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:52,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:52,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:52,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:54,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:54,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:54,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:54,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:54,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:54,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:54,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:54,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:54,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:54,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:55,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:55,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:55,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:55,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:34:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-09 09:34:55,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:55,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795899949] [2021-11-09 09:34:55,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795899949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:55,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497527952] [2021-11-09 09:34:55,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:34:55,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:55,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:55,417 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:55,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:35:01,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-09 09:35:01,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:01,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-09 09:35:01,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-09 09:35:02,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497527952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:02,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:02,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-09 09:35:02,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065031712] [2021-11-09 09:35:02,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 09:35:02,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 09:35:02,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:35:02,627 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 35 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 31 states have return successors, (31), 31 states have call predecessors, (31), 1 states have call successors, (31) [2021-11-09 09:35:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:03,746 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-11-09 09:35:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 09:35:03,747 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 35 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 31 states have return successors, (31), 31 states have call predecessors, (31), 1 states have call successors, (31) Word has length 190 [2021-11-09 09:35:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:03,747 INFO L225 Difference]: With dead ends: 109 [2021-11-09 09:35:03,747 INFO L226 Difference]: Without dead ends: 105 [2021-11-09 09:35:03,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:35:03,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-09 09:35:03,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-09 09:35:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 71 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-09 09:35:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-11-09 09:35:03,752 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 190 [2021-11-09 09:35:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:03,753 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-11-09 09:35:03,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 35 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 31 states have return successors, (31), 31 states have call predecessors, (31), 1 states have call successors, (31) [2021-11-09 09:35:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-11-09 09:35:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-09 09:35:03,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:03,755 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:03,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:03,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:03,966 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1665704854, now seen corresponding path program 31 times [2021-11-09 09:35:03,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:03,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115782130] [2021-11-09 09:35:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:03,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:04,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:04,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:04,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:04,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:04,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:04,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:04,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:04,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:04,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:04,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:05,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:06,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:06,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:06,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:06,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:06,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:06,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:06,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:06,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:06,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2021-11-09 09:35:06,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:06,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115782130] [2021-11-09 09:35:06,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115782130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:06,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085590197] [2021-11-09 09:35:06,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:35:06,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:06,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:06,879 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:06,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:35:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:08,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-09 09:35:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2021-11-09 09:35:09,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085590197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:09,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:09,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-11-09 09:35:09,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653828347] [2021-11-09 09:35:09,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 09:35:09,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:09,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 09:35:09,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:35:09,177 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 36 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2021-11-09 09:35:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:10,293 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-11-09 09:35:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-09 09:35:10,293 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 36 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) Word has length 196 [2021-11-09 09:35:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:10,294 INFO L225 Difference]: With dead ends: 112 [2021-11-09 09:35:10,294 INFO L226 Difference]: Without dead ends: 108 [2021-11-09 09:35:10,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:35:10,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-09 09:35:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-11-09 09:35:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 73 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 33 states have return successors, (34), 33 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-09 09:35:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-11-09 09:35:10,301 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 196 [2021-11-09 09:35:10,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:10,301 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-11-09 09:35:10,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 36 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2021-11-09 09:35:10,302 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-11-09 09:35:10,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-09 09:35:10,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:10,303 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:10,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-09 09:35:10,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:10,517 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:10,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1470481228, now seen corresponding path program 32 times [2021-11-09 09:35:10,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:10,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521095046] [2021-11-09 09:35:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:10,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:10,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:10,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:10,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:10,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:13,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:13,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:13,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:13,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:13,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:13,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:13,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2021-11-09 09:35:13,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:13,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521095046] [2021-11-09 09:35:13,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521095046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:13,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140317847] [2021-11-09 09:35:13,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:35:13,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:13,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:13,748 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:13,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:35:15,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:35:15,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:15,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-09 09:35:15,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2021-11-09 09:35:16,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140317847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:16,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:16,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-11-09 09:35:16,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484777114] [2021-11-09 09:35:16,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-09 09:35:16,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:16,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-09 09:35:16,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 09:35:16,150 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 33 states have return successors, (33), 33 states have call predecessors, (33), 1 states have call successors, (33) [2021-11-09 09:35:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:17,400 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2021-11-09 09:35:17,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 09:35:17,401 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 33 states have return successors, (33), 33 states have call predecessors, (33), 1 states have call successors, (33) Word has length 202 [2021-11-09 09:35:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:17,402 INFO L225 Difference]: With dead ends: 115 [2021-11-09 09:35:17,402 INFO L226 Difference]: Without dead ends: 111 [2021-11-09 09:35:17,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 09:35:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-09 09:35:17,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-09 09:35:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 75 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 34 states have return successors, (35), 34 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-09 09:35:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-11-09 09:35:17,408 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 202 [2021-11-09 09:35:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:17,408 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-11-09 09:35:17,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 33 states have return successors, (33), 33 states have call predecessors, (33), 1 states have call successors, (33) [2021-11-09 09:35:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-11-09 09:35:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-09 09:35:17,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:17,411 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:17,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:17,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:17,611 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:17,612 INFO L85 PathProgramCache]: Analyzing trace with hash -716142890, now seen corresponding path program 33 times [2021-11-09 09:35:17,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:17,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582877297] [2021-11-09 09:35:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:17,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:17,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:17,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:17,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:19,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:19,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:19,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:19,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:19,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:19,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:19,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:19,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:19,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:19,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:19,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:20,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:20,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:20,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:20,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:20,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:20,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:20,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:20,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:20,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2021-11-09 09:35:20,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:20,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582877297] [2021-11-09 09:35:20,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582877297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:20,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925205842] [2021-11-09 09:35:20,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:35:20,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:20,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:20,927 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:20,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:35:28,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-11-09 09:35:28,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:28,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 140 conjunts are in the unsatisfiable core [2021-11-09 09:35:28,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2021-11-09 09:35:29,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925205842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:29,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:29,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-11-09 09:35:29,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731032882] [2021-11-09 09:35:29,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-09 09:35:29,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-09 09:35:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 09:35:29,782 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 38 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 34 states have return successors, (34), 34 states have call predecessors, (34), 1 states have call successors, (34) [2021-11-09 09:35:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:31,050 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2021-11-09 09:35:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-09 09:35:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 38 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 34 states have return successors, (34), 34 states have call predecessors, (34), 1 states have call successors, (34) Word has length 208 [2021-11-09 09:35:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:31,052 INFO L225 Difference]: With dead ends: 118 [2021-11-09 09:35:31,052 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 09:35:31,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 09:35:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 09:35:31,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-09 09:35:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 76 states have (on average 1.013157894736842) internal successors, (77), 77 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 35 states have return successors, (36), 35 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-09 09:35:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-11-09 09:35:31,057 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 208 [2021-11-09 09:35:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:31,057 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-11-09 09:35:31,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 38 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 34 states have return successors, (34), 34 states have call predecessors, (34), 1 states have call successors, (34) [2021-11-09 09:35:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-11-09 09:35:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-09 09:35:31,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:31,060 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:31,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:31,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:31,272 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1668946420, now seen corresponding path program 34 times [2021-11-09 09:35:31,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:31,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676767485] [2021-11-09 09:35:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:31,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:31,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:31,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:31,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:31,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:31,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:32,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:32,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:32,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:32,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:32,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:32,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:32,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:32,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:35,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:35,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-09 09:35:35,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:35,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676767485] [2021-11-09 09:35:35,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676767485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:35,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101355632] [2021-11-09 09:35:35,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:35:35,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:35,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:35,276 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:35,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:35:37,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:35:37,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:37,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-09 09:35:37,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-09 09:35:37,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101355632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:37,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:37,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-11-09 09:35:37,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443583435] [2021-11-09 09:35:37,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-09 09:35:37,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:37,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-09 09:35:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=5256, Unknown=0, NotChecked=0, Total=5402 [2021-11-09 09:35:37,922 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 39 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 35 states have return successors, (35), 35 states have call predecessors, (35), 1 states have call successors, (35) [2021-11-09 09:35:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:39,289 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2021-11-09 09:35:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-09 09:35:39,289 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 39 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 35 states have return successors, (35), 35 states have call predecessors, (35), 1 states have call successors, (35) Word has length 214 [2021-11-09 09:35:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:39,291 INFO L225 Difference]: With dead ends: 121 [2021-11-09 09:35:39,291 INFO L226 Difference]: Without dead ends: 117 [2021-11-09 09:35:39,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=146, Invalid=5256, Unknown=0, NotChecked=0, Total=5402 [2021-11-09 09:35:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-09 09:35:39,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-09 09:35:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 79 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 36 states have return successors, (37), 36 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-09 09:35:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-11-09 09:35:39,297 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 214 [2021-11-09 09:35:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:39,298 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-11-09 09:35:39,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 39 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 35 states have return successors, (35), 35 states have call predecessors, (35), 1 states have call successors, (35) [2021-11-09 09:35:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-11-09 09:35:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-09 09:35:39,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:39,300 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:39,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:39,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 09:35:39,526 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:39,526 INFO L85 PathProgramCache]: Analyzing trace with hash 975419926, now seen corresponding path program 35 times [2021-11-09 09:35:39,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:39,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108704706] [2021-11-09 09:35:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:39,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:39,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:39,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:40,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:40,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:40,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:40,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:40,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:40,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:40,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:40,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:40,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:41,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:41,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:41,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:41,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:41,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:41,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:41,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:41,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:41,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:42,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:42,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:42,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:42,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:42,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:42,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:42,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:42,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:42,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:43,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:43,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:43,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:43,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:43,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:43,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:35:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-11-09 09:35:43,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:43,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108704706] [2021-11-09 09:35:43,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108704706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:43,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435604429] [2021-11-09 09:35:43,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:35:43,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:43,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:43,683 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:43,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:36:06,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-09 09:36:06,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-09 09:36:06,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-11-09 09:36:07,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435604429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:07,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:07,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-11-09 09:36:07,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035752539] [2021-11-09 09:36:07,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-09 09:36:07,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:07,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-09 09:36:07,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=5550, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 09:36:07,853 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 76 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 40 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 36 states have return successors, (36), 36 states have call predecessors, (36), 1 states have call successors, (36) [2021-11-09 09:36:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:09,262 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2021-11-09 09:36:09,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 09:36:09,262 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 40 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 36 states have return successors, (36), 36 states have call predecessors, (36), 1 states have call successors, (36) Word has length 220 [2021-11-09 09:36:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:09,263 INFO L225 Difference]: With dead ends: 124 [2021-11-09 09:36:09,263 INFO L226 Difference]: Without dead ends: 120 [2021-11-09 09:36:09,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=150, Invalid=5550, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 09:36:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-09 09:36:09,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-11-09 09:36:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 80 states have (on average 1.0125) internal successors, (81), 81 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 37 states have return successors, (38), 37 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-09 09:36:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2021-11-09 09:36:09,269 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 220 [2021-11-09 09:36:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:09,270 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2021-11-09 09:36:09,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 40 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 36 states have return successors, (36), 36 states have call predecessors, (36), 1 states have call successors, (36) [2021-11-09 09:36:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2021-11-09 09:36:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-09 09:36:09,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:09,272 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:09,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:09,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 09:36:09,474 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:09,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:09,474 INFO L85 PathProgramCache]: Analyzing trace with hash -590104372, now seen corresponding path program 36 times [2021-11-09 09:36:09,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:09,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992648095] [2021-11-09 09:36:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:09,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:09,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:09,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:09,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:09,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:10,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:11,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:11,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:11,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:11,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:11,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:11,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:11,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:11,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:12,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:12,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:12,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:12,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:12,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:12,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:12,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:12,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:13,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:13,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:13,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:13,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:13,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-11-09 09:36:13,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:13,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992648095] [2021-11-09 09:36:13,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992648095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:13,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181858757] [2021-11-09 09:36:13,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:36:13,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:13,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:13,580 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:13,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:36:22,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-09 09:36:22,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 152 conjunts are in the unsatisfiable core [2021-11-09 09:36:22,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-11-09 09:36:23,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181858757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:23,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:23,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-11-09 09:36:23,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520390205] [2021-11-09 09:36:23,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-09 09:36:23,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-09 09:36:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5852, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 09:36:23,104 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 78 states, 78 states have (on average 1.064102564102564) internal successors, (83), 41 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 37 states have return successors, (37), 37 states have call predecessors, (37), 1 states have call successors, (37) [2021-11-09 09:36:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:24,671 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2021-11-09 09:36:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-09 09:36:24,672 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.064102564102564) internal successors, (83), 41 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 37 states have return successors, (37), 37 states have call predecessors, (37), 1 states have call successors, (37) Word has length 226 [2021-11-09 09:36:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:24,674 INFO L225 Difference]: With dead ends: 127 [2021-11-09 09:36:24,674 INFO L226 Difference]: Without dead ends: 123 [2021-11-09 09:36:24,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=154, Invalid=5852, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 09:36:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-09 09:36:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-09 09:36:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 83 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 38 states have return successors, (39), 38 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-09 09:36:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2021-11-09 09:36:24,681 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 226 [2021-11-09 09:36:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:24,681 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2021-11-09 09:36:24,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.064102564102564) internal successors, (83), 41 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 37 states have return successors, (37), 37 states have call predecessors, (37), 1 states have call successors, (37) [2021-11-09 09:36:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2021-11-09 09:36:24,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-09 09:36:24,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:24,684 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:24,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:24,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 09:36:24,890 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:24,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:24,890 INFO L85 PathProgramCache]: Analyzing trace with hash -370786986, now seen corresponding path program 37 times [2021-11-09 09:36:24,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:24,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410949951] [2021-11-09 09:36:24,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:24,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:25,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:25,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:25,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:25,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:25,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:25,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:25,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:25,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:25,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:29,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2021-11-09 09:36:29,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:29,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410949951] [2021-11-09 09:36:29,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410949951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:29,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276646773] [2021-11-09 09:36:29,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:36:29,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:29,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:29,096 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:29,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:36:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:31,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 156 conjunts are in the unsatisfiable core [2021-11-09 09:36:31,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2021-11-09 09:36:32,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276646773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:32,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:32,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-11-09 09:36:32,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236219077] [2021-11-09 09:36:32,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-09 09:36:32,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:32,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-09 09:36:32,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=6162, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:36:32,038 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 80 states, 80 states have (on average 1.0625) internal successors, (85), 42 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 38 states have return successors, (38), 38 states have call predecessors, (38), 1 states have call successors, (38) [2021-11-09 09:36:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:33,592 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-11-09 09:36:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-09 09:36:33,592 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.0625) internal successors, (85), 42 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 38 states have return successors, (38), 38 states have call predecessors, (38), 1 states have call successors, (38) Word has length 232 [2021-11-09 09:36:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:33,593 INFO L225 Difference]: With dead ends: 130 [2021-11-09 09:36:33,593 INFO L226 Difference]: Without dead ends: 126 [2021-11-09 09:36:33,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=158, Invalid=6162, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:36:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-09 09:36:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-09 09:36:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 85 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 39 states have return successors, (40), 39 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-09 09:36:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-11-09 09:36:33,599 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 232 [2021-11-09 09:36:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:33,600 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-11-09 09:36:33,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.0625) internal successors, (85), 42 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 38 states have return successors, (38), 38 states have call predecessors, (38), 1 states have call successors, (38) [2021-11-09 09:36:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-11-09 09:36:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-09 09:36:33,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:33,602 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:33,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:33,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:36:33,822 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:33,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:33,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1567308684, now seen corresponding path program 38 times [2021-11-09 09:36:33,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:33,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598781969] [2021-11-09 09:36:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:33,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:34,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:34,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:34,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:34,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:34,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:34,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:34,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:34,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:34,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:34,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:35,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:35,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:35,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:35,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:35,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:35,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:35,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:35,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:35,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:35,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:37,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:37,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:37,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:37,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:37,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:37,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:37,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:37,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:38,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-11-09 09:36:38,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:38,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598781969] [2021-11-09 09:36:38,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598781969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:38,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225641143] [2021-11-09 09:36:38,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:38,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:38,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:38,072 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:38,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:36:40,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:40,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:40,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 160 conjunts are in the unsatisfiable core [2021-11-09 09:36:40,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-11-09 09:36:41,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225641143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:41,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:41,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-11-09 09:36:41,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032630335] [2021-11-09 09:36:41,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-09 09:36:41,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:41,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-09 09:36:41,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6480, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 09:36:41,170 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 82 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 43 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 39 states have return successors, (39), 39 states have call predecessors, (39), 1 states have call successors, (39) [2021-11-09 09:36:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:42,825 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2021-11-09 09:36:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-09 09:36:42,826 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 43 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 39 states have return successors, (39), 39 states have call predecessors, (39), 1 states have call successors, (39) Word has length 238 [2021-11-09 09:36:42,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:42,827 INFO L225 Difference]: With dead ends: 133 [2021-11-09 09:36:42,827 INFO L226 Difference]: Without dead ends: 129 [2021-11-09 09:36:42,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=162, Invalid=6480, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 09:36:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-09 09:36:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-09 09:36:42,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 87 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 40 states have return successors, (41), 40 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-09 09:36:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-11-09 09:36:42,835 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 238 [2021-11-09 09:36:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:42,835 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-11-09 09:36:42,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 43 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 39 states have return successors, (39), 39 states have call predecessors, (39), 1 states have call successors, (39) [2021-11-09 09:36:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-11-09 09:36:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-09 09:36:42,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:42,838 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:42,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:43,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:43,066 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:43,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1044639594, now seen corresponding path program 39 times [2021-11-09 09:36:43,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:43,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659034931] [2021-11-09 09:36:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:43,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:43,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:43,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:43,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:43,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:43,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:43,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:44,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:44,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:44,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:44,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:44,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:44,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:44,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:44,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:47,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:47,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:47,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:47,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:47,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:47,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:36:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2021-11-09 09:36:47,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:47,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659034931] [2021-11-09 09:36:47,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659034931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:47,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081657369] [2021-11-09 09:36:47,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:36:47,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:47,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:47,790 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:47,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:37:00,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-11-09 09:37:00,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:00,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 164 conjunts are in the unsatisfiable core [2021-11-09 09:37:00,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2021-11-09 09:37:01,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081657369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:01,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:01,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-11-09 09:37:01,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898741616] [2021-11-09 09:37:01,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-09 09:37:01,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:01,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-09 09:37:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=6806, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 09:37:01,394 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 84 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 44 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 40 states have return successors, (40), 40 states have call predecessors, (40), 1 states have call successors, (40) [2021-11-09 09:37:03,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:03,170 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2021-11-09 09:37:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-09 09:37:03,171 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 44 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 40 states have return successors, (40), 40 states have call predecessors, (40), 1 states have call successors, (40) Word has length 244 [2021-11-09 09:37:03,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:03,173 INFO L225 Difference]: With dead ends: 136 [2021-11-09 09:37:03,173 INFO L226 Difference]: Without dead ends: 132 [2021-11-09 09:37:03,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 323 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=166, Invalid=6806, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 09:37:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-09 09:37:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-11-09 09:37:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 89 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 41 states have return successors, (42), 41 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-09 09:37:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2021-11-09 09:37:03,179 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 244 [2021-11-09 09:37:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:03,180 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2021-11-09 09:37:03,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 44 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 40 states have return successors, (40), 40 states have call predecessors, (40), 1 states have call successors, (40) [2021-11-09 09:37:03,180 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2021-11-09 09:37:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-09 09:37:03,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:03,182 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:03,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:03,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:37:03,397 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2116578892, now seen corresponding path program 40 times [2021-11-09 09:37:03,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:03,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040507918] [2021-11-09 09:37:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:03,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:03,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:03,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:03,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:03,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:04,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:04,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:04,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:04,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:04,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:04,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:07,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:07,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:07,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:07,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:07,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:07,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:07,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:07,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:07,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:08,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:08,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:08,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:08,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2021-11-09 09:37:08,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:08,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040507918] [2021-11-09 09:37:08,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040507918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:08,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279349469] [2021-11-09 09:37:08,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:37:08,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:08,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:08,542 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:08,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:37:10,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:37:10,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:10,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 168 conjunts are in the unsatisfiable core [2021-11-09 09:37:10,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2021-11-09 09:37:11,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279349469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:11,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:11,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2021-11-09 09:37:11,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303943643] [2021-11-09 09:37:11,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-09 09:37:11,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:11,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-09 09:37:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=7140, Unknown=0, NotChecked=0, Total=7310 [2021-11-09 09:37:11,939 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 86 states, 86 states have (on average 1.058139534883721) internal successors, (91), 45 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 41 states have return successors, (41), 41 states have call predecessors, (41), 1 states have call successors, (41) [2021-11-09 09:37:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:13,991 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2021-11-09 09:37:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-09 09:37:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.058139534883721) internal successors, (91), 45 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 41 states have return successors, (41), 41 states have call predecessors, (41), 1 states have call successors, (41) Word has length 250 [2021-11-09 09:37:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:13,993 INFO L225 Difference]: With dead ends: 139 [2021-11-09 09:37:13,993 INFO L226 Difference]: Without dead ends: 135 [2021-11-09 09:37:13,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=170, Invalid=7140, Unknown=0, NotChecked=0, Total=7310 [2021-11-09 09:37:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-09 09:37:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-11-09 09:37:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 90 states have (on average 1.011111111111111) internal successors, (91), 91 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 42 states have return successors, (43), 42 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-09 09:37:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-11-09 09:37:13,999 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 250 [2021-11-09 09:37:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:13,999 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-11-09 09:37:14,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.058139534883721) internal successors, (91), 45 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 41 states have return successors, (41), 41 states have call predecessors, (41), 1 states have call successors, (41) [2021-11-09 09:37:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-11-09 09:37:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-09 09:37:14,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:14,002 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:14,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:14,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:14,206 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:14,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1674130390, now seen corresponding path program 41 times [2021-11-09 09:37:14,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:14,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850759741] [2021-11-09 09:37:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:14,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:14,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:14,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:14,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:14,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:14,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:15,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:15,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:15,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:15,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:15,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:15,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:15,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:15,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:17,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:17,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:17,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:17,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:17,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:17,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:17,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:17,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:18,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:18,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:18,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:18,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:18,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:18,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:18,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:18,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:19,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:19,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:19,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:19,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:19,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:37:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-09 09:37:19,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:19,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850759741] [2021-11-09 09:37:19,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850759741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:19,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918395238] [2021-11-09 09:37:19,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:37:19,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:19,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:19,664 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:19,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 09:40:02,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-09 09:40:02,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:02,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 172 conjunts are in the unsatisfiable core [2021-11-09 09:40:02,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-09 09:40:04,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918395238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:04,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:04,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2021-11-09 09:40:04,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257121605] [2021-11-09 09:40:04,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-09 09:40:04,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:04,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-09 09:40:04,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=7482, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 09:40:04,027 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 88 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 46 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 42 states have return successors, (42), 42 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-09 09:40:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:06,004 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2021-11-09 09:40:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-09 09:40:06,004 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 46 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 42 states have return successors, (42), 42 states have call predecessors, (42), 1 states have call successors, (42) Word has length 256 [2021-11-09 09:40:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:06,005 INFO L225 Difference]: With dead ends: 142 [2021-11-09 09:40:06,005 INFO L226 Difference]: Without dead ends: 138 [2021-11-09 09:40:06,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=174, Invalid=7482, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 09:40:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-09 09:40:06,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-11-09 09:40:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 93 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 43 states have return successors, (44), 43 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-09 09:40:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2021-11-09 09:40:06,011 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 256 [2021-11-09 09:40:06,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:06,012 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2021-11-09 09:40:06,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 46 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 42 states have return successors, (42), 42 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-09 09:40:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2021-11-09 09:40:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-09 09:40:06,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:06,014 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:06,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:06,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-09 09:40:06,222 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:06,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:06,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2045202700, now seen corresponding path program 42 times [2021-11-09 09:40:06,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:06,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508775296] [2021-11-09 09:40:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:06,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:06,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:06,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:06,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:06,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:07,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:07,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:07,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:07,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:07,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:07,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:07,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:07,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:08,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:08,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:08,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:08,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:08,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:08,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:08,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:08,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:08,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:08,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:09,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:09,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:09,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:09,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:09,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:09,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:09,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:09,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:10,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:10,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:10,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:10,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:10,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:10,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:10,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:10,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:11,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:11,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:11,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:11,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:11,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2021-11-09 09:40:11,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:11,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508775296] [2021-11-09 09:40:11,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508775296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:11,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387135118] [2021-11-09 09:40:11,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:40:11,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:11,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:11,721 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:11,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 09:40:23,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-11-09 09:40:23,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 176 conjunts are in the unsatisfiable core [2021-11-09 09:40:23,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2021-11-09 09:40:24,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387135118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:24,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:24,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-11-09 09:40:24,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116100543] [2021-11-09 09:40:24,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-09 09:40:24,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-09 09:40:24,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7832, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 09:40:24,810 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 90 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 47 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 43 states have return successors, (43), 43 states have call predecessors, (43), 1 states have call successors, (43) [2021-11-09 09:40:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:26,884 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2021-11-09 09:40:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-09 09:40:26,885 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 47 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 43 states have return successors, (43), 43 states have call predecessors, (43), 1 states have call successors, (43) Word has length 262 [2021-11-09 09:40:26,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:26,886 INFO L225 Difference]: With dead ends: 145 [2021-11-09 09:40:26,886 INFO L226 Difference]: Without dead ends: 141 [2021-11-09 09:40:26,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=178, Invalid=7832, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 09:40:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-09 09:40:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-09 09:40:26,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 95 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 44 states have return successors, (45), 44 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-09 09:40:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-11-09 09:40:26,893 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 262 [2021-11-09 09:40:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:26,893 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-11-09 09:40:26,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 47 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 43 states have return successors, (43), 43 states have call predecessors, (43), 1 states have call successors, (43) [2021-11-09 09:40:26,894 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-11-09 09:40:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-09 09:40:26,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:26,896 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:26,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:27,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 09:40:27,110 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:27,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1999742742, now seen corresponding path program 43 times [2021-11-09 09:40:27,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:27,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715866045] [2021-11-09 09:40:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:27,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:27,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:27,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:27,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:27,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:27,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:28,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:28,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:28,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:28,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:28,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:28,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:28,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:28,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:29,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:29,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:29,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:29,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:29,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:29,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:29,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:29,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:30,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:30,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:30,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:30,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:30,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:30,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:30,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:30,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:31,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:31,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:31,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:31,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:31,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:31,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:31,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:32,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:32,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:32,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:32,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:32,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:32,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:32,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:32,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2021-11-09 09:40:33,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:33,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715866045] [2021-11-09 09:40:33,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715866045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:33,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340670827] [2021-11-09 09:40:33,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:40:33,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:33,095 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:33,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 09:40:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:36,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 180 conjunts are in the unsatisfiable core [2021-11-09 09:40:36,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2021-11-09 09:40:37,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340670827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:37,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:37,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2021-11-09 09:40:37,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113680426] [2021-11-09 09:40:37,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-09 09:40:37,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-09 09:40:37,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=8190, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 09:40:37,286 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 92 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 48 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 44 states have return successors, (44), 44 states have call predecessors, (44), 1 states have call successors, (44) [2021-11-09 09:40:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:39,430 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2021-11-09 09:40:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-09 09:40:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 48 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 44 states have return successors, (44), 44 states have call predecessors, (44), 1 states have call successors, (44) Word has length 268 [2021-11-09 09:40:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:39,432 INFO L225 Difference]: With dead ends: 148 [2021-11-09 09:40:39,432 INFO L226 Difference]: Without dead ends: 144 [2021-11-09 09:40:39,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 355 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=182, Invalid=8190, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 09:40:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-09 09:40:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-11-09 09:40:39,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 97 states have internal predecessors, (97), 2 states have call successors, (2), 1 states have call predecessors, (2), 45 states have return successors, (46), 45 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-09 09:40:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2021-11-09 09:40:39,439 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 268 [2021-11-09 09:40:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:39,440 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2021-11-09 09:40:39,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 48 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 44 states have return successors, (44), 44 states have call predecessors, (44), 1 states have call successors, (44) [2021-11-09 09:40:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2021-11-09 09:40:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-09 09:40:39,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:39,443 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:39,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:39,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 09:40:39,650 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:39,650 INFO L85 PathProgramCache]: Analyzing trace with hash 646177740, now seen corresponding path program 44 times [2021-11-09 09:40:39,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:39,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652703578] [2021-11-09 09:40:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:39,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:40,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:40,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:40,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:40,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:40,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:40,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:40,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:40,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:41,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:41,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:41,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:41,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:41,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:41,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:41,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:41,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:42,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:42,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:42,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:42,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:42,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:42,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:42,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:42,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:43,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:43,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:43,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:43,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:43,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:43,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:43,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:43,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:43,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:44,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:44,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:44,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:44,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:44,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:44,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:44,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:45,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:45,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:45,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-11-09 09:40:45,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:45,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652703578] [2021-11-09 09:40:45,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652703578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:45,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755721091] [2021-11-09 09:40:45,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:40:45,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:45,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:45,502 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:45,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 09:40:48,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:40:48,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:48,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 184 conjunts are in the unsatisfiable core [2021-11-09 09:40:48,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-11-09 09:40:49,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755721091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:49,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:49,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-11-09 09:40:49,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055763082] [2021-11-09 09:40:49,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-09 09:40:49,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:49,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-09 09:40:49,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8556, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 09:40:49,922 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 94 states, 94 states have (on average 1.053191489361702) internal successors, (99), 49 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 45 states have return successors, (45), 45 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-09 09:40:52,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:52,480 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2021-11-09 09:40:52,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-09 09:40:52,481 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.053191489361702) internal successors, (99), 49 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 45 states have return successors, (45), 45 states have call predecessors, (45), 1 states have call successors, (45) Word has length 274 [2021-11-09 09:40:52,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:52,482 INFO L225 Difference]: With dead ends: 151 [2021-11-09 09:40:52,482 INFO L226 Difference]: Without dead ends: 147 [2021-11-09 09:40:52,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 363 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=186, Invalid=8556, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 09:40:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-09 09:40:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-09 09:40:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 98 states have (on average 1.010204081632653) internal successors, (99), 99 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 46 states have return successors, (47), 46 states have call predecessors, (47), 2 states have call successors, (47) [2021-11-09 09:40:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2021-11-09 09:40:52,488 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 274 [2021-11-09 09:40:52,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:52,489 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2021-11-09 09:40:52,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.053191489361702) internal successors, (99), 49 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 45 states have return successors, (45), 45 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-09 09:40:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2021-11-09 09:40:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-09 09:40:52,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:52,492 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:52,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:52,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-09 09:40:52,714 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:52,714 INFO L85 PathProgramCache]: Analyzing trace with hash -400987562, now seen corresponding path program 45 times [2021-11-09 09:40:52,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:52,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808653603] [2021-11-09 09:40:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:52,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:52,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:53,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:53,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:53,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:53,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:53,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:54,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:54,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:54,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:54,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:54,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:54,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:56,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:56,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:56,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:56,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:56,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:56,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:56,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:57,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:57,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:57,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:57,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:57,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:57,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:57,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:58,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:58,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:58,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:58,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:58,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:58,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:58,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:59,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:59,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:59,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:59,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:40:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2021-11-09 09:40:59,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:59,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808653603] [2021-11-09 09:40:59,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808653603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:59,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783751785] [2021-11-09 09:40:59,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:40:59,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:59,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:59,670 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:59,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 09:41:43,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-11-09 09:41:43,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:43,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 188 conjunts are in the unsatisfiable core [2021-11-09 09:41:43,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2021-11-09 09:41:44,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783751785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:44,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:44,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-11-09 09:41:44,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882065663] [2021-11-09 09:41:44,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-09 09:41:44,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-09 09:41:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=8930, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 09:41:44,551 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 50 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 46 states have return successors, (46), 46 states have call predecessors, (46), 1 states have call successors, (46) [2021-11-09 09:41:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:47,410 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-11-09 09:41:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-09 09:41:47,410 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 50 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 46 states have return successors, (46), 46 states have call predecessors, (46), 1 states have call successors, (46) Word has length 280 [2021-11-09 09:41:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:47,412 INFO L225 Difference]: With dead ends: 154 [2021-11-09 09:41:47,412 INFO L226 Difference]: Without dead ends: 150 [2021-11-09 09:41:47,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 371 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=190, Invalid=8930, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 09:41:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-09 09:41:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-09 09:41:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 100 states have (on average 1.01) internal successors, (101), 101 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 47 states have return successors, (48), 47 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-09 09:41:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2021-11-09 09:41:47,421 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 280 [2021-11-09 09:41:47,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:47,422 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2021-11-09 09:41:47,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 50 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 46 states have return successors, (46), 46 states have call predecessors, (46), 1 states have call successors, (46) [2021-11-09 09:41:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2021-11-09 09:41:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-09 09:41:47,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:47,425 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:47,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:47,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 09:41:47,648 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:47,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1260771700, now seen corresponding path program 46 times [2021-11-09 09:41:47,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:47,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238439214] [2021-11-09 09:41:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:47,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:47,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:48,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:48,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:48,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:48,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:48,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:49,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:49,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:49,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:49,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:49,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:49,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:49,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:50,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:50,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:50,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:50,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:50,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:50,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:51,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:51,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:51,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:51,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:51,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:51,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:51,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:52,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:52,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:52,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:52,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:52,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:52,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:53,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:53,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:53,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:53,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:53,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:53,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:53,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:54,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:54,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:54,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:54,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:54,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:54,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:55,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:55,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:41:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6394 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2021-11-09 09:41:55,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:55,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238439214] [2021-11-09 09:41:55,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238439214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:55,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267223700] [2021-11-09 09:41:55,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:41:55,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:55,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:55,340 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:55,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 09:41:59,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:41:59,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:59,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-09 09:41:59,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6394 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2021-11-09 09:42:00,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267223700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:00,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:42:00,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2021-11-09 09:42:00,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19739401] [2021-11-09 09:42:00,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-09 09:42:00,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:00,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-09 09:42:00,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=9312, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 09:42:00,466 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 98 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 51 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 47 states have return successors, (47), 47 states have call predecessors, (47), 1 states have call successors, (47) [2021-11-09 09:42:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:03,494 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2021-11-09 09:42:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-09 09:42:03,495 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 51 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 47 states have return successors, (47), 47 states have call predecessors, (47), 1 states have call successors, (47) Word has length 286 [2021-11-09 09:42:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:03,496 INFO L225 Difference]: With dead ends: 157 [2021-11-09 09:42:03,496 INFO L226 Difference]: Without dead ends: 153 [2021-11-09 09:42:03,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=194, Invalid=9312, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 09:42:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-09 09:42:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-09 09:42:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 103 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 48 states have return successors, (49), 48 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-09 09:42:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2021-11-09 09:42:03,504 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 286 [2021-11-09 09:42:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:03,505 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2021-11-09 09:42:03,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 51 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 47 states have return successors, (47), 47 states have call predecessors, (47), 1 states have call successors, (47) [2021-11-09 09:42:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2021-11-09 09:42:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-09 09:42:03,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:03,509 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:03,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-09 09:42:03,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:03,730 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:03,730 INFO L85 PathProgramCache]: Analyzing trace with hash 665091478, now seen corresponding path program 47 times [2021-11-09 09:42:03,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:03,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950039349] [2021-11-09 09:42:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:03,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:04,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:04,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:04,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:04,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:04,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:05,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:05,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:05,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:05,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:05,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:05,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:06,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:06,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:06,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:06,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:06,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:06,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:06,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:07,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:07,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:07,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:07,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:07,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:07,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:07,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:08,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:08,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:08,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:08,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:08,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:08,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:09,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:09,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:09,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:09,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:09,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:09,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:09,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:10,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:10,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:10,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:10,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:10,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:10,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:11,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:11,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:11,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:11,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 09:42:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-11-09 09:42:11,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:11,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950039349] [2021-11-09 09:42:11,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950039349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:11,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872727663] [2021-11-09 09:42:11,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:42:11,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:11,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:11,832 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:11,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3722f8-35fe-4399-b05a-78329bf34b53/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process