./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G --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 2719a9efd2165050483c20571c85746fdd7204d074459e12a38b31692a3fffb0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:06:20,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:06:20,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:06:20,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:06:20,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:06:20,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:06:20,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:06:20,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:06:20,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:06:20,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:06:20,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:06:20,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:06:20,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:06:20,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:06:20,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:06:20,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:06:20,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:06:20,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:06:20,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:06:20,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:06:20,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:06:20,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:06:20,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:06:20,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:06:20,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:06:20,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:06:20,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:06:20,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:06:20,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:06:20,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:06:20,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:06:20,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:06:20,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:06:20,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:06:20,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:06:20,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:06:20,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:06:20,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:06:20,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:06:20,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:06:20,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:06:20,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:06:20,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:06:20,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:06:20,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:06:20,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:06:20,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:06:20,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:06:20,716 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:06:20,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:06:20,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:06:20,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:06:20,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:06:20,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:06:20,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:06:20,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:06:20,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:06:20,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:06:20,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:06:20,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:06:20,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:06:20,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:06:20,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:06:20,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:06:20,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:06:20,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:06:20,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:06:20,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:06:20,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:06:20,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:06:20,723 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:06:20,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:06:20,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:06:20,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:06:20,746 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_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2719a9efd2165050483c20571c85746fdd7204d074459e12a38b31692a3fffb0 [2021-11-23 13:06:21,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:06:21,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:06:21,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:06:21,106 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:06:21,108 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:06:21,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2021-11-23 13:06:21,181 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/data/3ca1cff76/528e83e458f44267b4d63e5f96c863c1/FLAGe156819b7 [2021-11-23 13:06:21,801 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:06:21,802 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2021-11-23 13:06:21,813 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/data/3ca1cff76/528e83e458f44267b4d63e5f96c863c1/FLAGe156819b7 [2021-11-23 13:06:22,210 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/data/3ca1cff76/528e83e458f44267b4d63e5f96c863c1 [2021-11-23 13:06:22,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:06:22,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:06:22,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:06:22,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:06:22,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:06:22,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@127ca42a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22, skipping insertion in model container [2021-11-23 13:06:22,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:06:22,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:06:22,433 WARN L230 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_318b1557-608f-43c5-9ff7-19b39c5331c4/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2021-11-23 13:06:22,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:06:22,460 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:06:22,472 WARN L230 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_318b1557-608f-43c5-9ff7-19b39c5331c4/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2021-11-23 13:06:22,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:06:22,495 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:06:22,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22 WrapperNode [2021-11-23 13:06:22,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:06:22,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:06:22,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:06:22,498 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:06:22,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,536 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2021-11-23 13:06:22,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:06:22,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:06:22,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:06:22,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:06:22,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:06:22,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:06:22,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:06:22,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:06:22,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22" (1/1) ... [2021-11-23 13:06:22,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:06:22,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:22,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:06:22,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:06:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:06:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:06:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:06:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:06:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:06:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:06:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:06:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:06:22,719 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:06:22,720 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:06:22,875 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:06:22,883 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:06:22,883 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-23 13:06:22,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:06:22 BoogieIcfgContainer [2021-11-23 13:06:22,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:06:22,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:06:22,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:06:22,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:06:22,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:06:22" (1/3) ... [2021-11-23 13:06:22,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b7ca32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:06:22, skipping insertion in model container [2021-11-23 13:06:22,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:06:22" (2/3) ... [2021-11-23 13:06:22,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b7ca32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:06:22, skipping insertion in model container [2021-11-23 13:06:22,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:06:22" (3/3) ... [2021-11-23 13:06:22,899 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2021-11-23 13:06:22,905 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:06:22,906 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:06:22,964 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:06:22,973 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 [2021-11-23 13:06:22,973 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:06:22,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 13:06:22,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:22,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:22,996 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:23,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:23,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2021-11-23 13:06:23,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:23,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828283410] [2021-11-23 13:06:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:23,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:06:23,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828283410] [2021-11-23 13:06:23,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828283410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:06:23,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:06:23,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:06:23,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670056805] [2021-11-23 13:06:23,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:06:23,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:06:23,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:06:23,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:06:23,258 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:23,289 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2021-11-23 13:06:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:06:23,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 13:06:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:23,301 INFO L225 Difference]: With dead ends: 42 [2021-11-23 13:06:23,301 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 13:06:23,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:06:23,309 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:23,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:06:23,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 13:06:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-23 13:06:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-23 13:06:23,348 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-23 13:06:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:23,348 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-23 13:06:23,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-23 13:06:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:06:23,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:23,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:23,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:06:23,351 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2021-11-23 13:06:23,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:23,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215414564] [2021-11-23 13:06:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:23,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:06:23,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:23,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215414564] [2021-11-23 13:06:23,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215414564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:06:23,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246950902] [2021-11-23 13:06:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:23,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:23,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:23,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:06:23,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:06:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:23,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 13:06:23,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:06:23,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:06:23,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246950902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:06:23,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:06:23,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 13:06:23,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185088049] [2021-11-23 13:06:23,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:06:23,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:06:23,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:06:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:06:23,588 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:23,605 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-11-23 13:06:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:06:23,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 13:06:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:23,606 INFO L225 Difference]: With dead ends: 32 [2021-11-23 13:06:23,606 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 13:06:23,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:06:23,609 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:23,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:06:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 13:06:23,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 13:06:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-23 13:06:23,664 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2021-11-23 13:06:23,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:23,665 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-23 13:06:23,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-23 13:06:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 13:06:23,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:23,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:23,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:06:23,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:23,875 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:23,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2021-11-23 13:06:23,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:23,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453834194] [2021-11-23 13:06:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:23,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:06:23,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:23,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453834194] [2021-11-23 13:06:23,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453834194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:06:23,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127959967] [2021-11-23 13:06:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:23,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:23,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:23,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:06:23,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:06:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:24,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 13:06:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:06:24,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:06:24,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127959967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:06:24,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:06:24,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 13:06:24,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376613250] [2021-11-23 13:06:24,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:06:24,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:06:24,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:24,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:06:24,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:06:24,061 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:24,077 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-11-23 13:06:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:06:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 13:06:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:24,079 INFO L225 Difference]: With dead ends: 44 [2021-11-23 13:06:24,079 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 13:06:24,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:06:24,081 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:24,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:06:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 13:06:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-23 13:06:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-11-23 13:06:24,091 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2021-11-23 13:06:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:24,091 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-11-23 13:06:24,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:24,092 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-11-23 13:06:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 13:06:24,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:24,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:24,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:06:24,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:24,294 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:24,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:24,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2021-11-23 13:06:24,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:24,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376421341] [2021-11-23 13:06:24,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:24,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:06:24,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:24,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376421341] [2021-11-23 13:06:24,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376421341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:06:24,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546200765] [2021-11-23 13:06:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:24,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:24,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:24,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:06:24,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:06:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:24,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:06:24,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:06:24,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:06:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:06:24,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546200765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:06:24,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:06:24,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 13:06:24,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549227768] [2021-11-23 13:06:24,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:06:24,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:06:24,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:24,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:06:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:06:24,586 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:24,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:24,640 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2021-11-23 13:06:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:06:24,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 13:06:24,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:24,644 INFO L225 Difference]: With dead ends: 49 [2021-11-23 13:06:24,644 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 13:06:24,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:06:24,652 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:24,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 59 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:06:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 13:06:24,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-23 13:06:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-23 13:06:24,661 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2021-11-23 13:06:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:24,661 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-23 13:06:24,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-23 13:06:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:06:24,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:24,662 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:24,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:06:24,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:24,871 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:24,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:24,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1612157157, now seen corresponding path program 2 times [2021-11-23 13:06:24,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:24,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399696239] [2021-11-23 13:06:24,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:24,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:06:24,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:24,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399696239] [2021-11-23 13:06:24,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399696239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:06:24,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656216012] [2021-11-23 13:06:24,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:06:24,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:24,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:24,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:06:24,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:06:25,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:06:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:06:25,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:06:25,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:06:25,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:06:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:06:25,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656216012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:06:25,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:06:25,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-23 13:06:25,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414736328] [2021-11-23 13:06:25,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:06:25,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:06:25,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:25,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:06:25,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:06:25,260 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:25,339 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2021-11-23 13:06:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 13:06:25,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 13:06:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:25,342 INFO L225 Difference]: With dead ends: 70 [2021-11-23 13:06:25,342 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 13:06:25,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:06:25,345 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:25,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:06:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 13:06:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-11-23 13:06:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-11-23 13:06:25,365 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 23 [2021-11-23 13:06:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:25,366 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-11-23 13:06:25,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-11-23 13:06:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 13:06:25,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:25,368 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:25,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:06:25,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:25,568 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:25,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1679231593, now seen corresponding path program 3 times [2021-11-23 13:06:25,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:25,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975140777] [2021-11-23 13:06:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:25,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 13:06:25,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:25,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975140777] [2021-11-23 13:06:25,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975140777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:06:25,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955115416] [2021-11-23 13:06:25,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:06:25,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:25,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:25,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:06:25,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:06:25,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 13:06:25,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:06:25,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:06:25,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 13:06:25,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:06:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 13:06:25,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955115416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:06:25,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:06:25,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-23 13:06:25,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945739318] [2021-11-23 13:06:25,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:06:25,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:06:25,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:06:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:06:25,972 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:26,036 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2021-11-23 13:06:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:06:26,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-23 13:06:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:26,041 INFO L225 Difference]: With dead ends: 94 [2021-11-23 13:06:26,042 INFO L226 Difference]: Without dead ends: 71 [2021-11-23 13:06:26,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:06:26,046 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:26,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 58 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:06:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-23 13:06:26,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-23 13:06:26,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:26,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-11-23 13:06:26,063 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 38 [2021-11-23 13:06:26,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:26,064 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-11-23 13:06:26,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-11-23 13:06:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 13:06:26,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:26,066 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:26,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:06:26,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 13:06:26,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:26,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:26,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 4 times [2021-11-23 13:06:26,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:26,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046594293] [2021-11-23 13:06:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:26,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 13:06:26,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:26,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046594293] [2021-11-23 13:06:26,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046594293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:06:26,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148931775] [2021-11-23 13:06:26,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:06:26,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:26,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:26,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:06:26,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:06:26,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:06:26,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:06:26,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 13:06:26,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 13:06:26,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:06:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 13:06:26,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148931775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:06:26,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:06:26,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-23 13:06:26,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774169136] [2021-11-23 13:06:26,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:06:26,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 13:06:26,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 13:06:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:06:26,949 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:27,054 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2021-11-23 13:06:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 13:06:27,055 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-23 13:06:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:27,056 INFO L225 Difference]: With dead ends: 143 [2021-11-23 13:06:27,056 INFO L226 Difference]: Without dead ends: 95 [2021-11-23 13:06:27,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:06:27,057 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:27,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 78 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:06:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-23 13:06:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-23 13:06:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 94 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2021-11-23 13:06:27,066 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 50 [2021-11-23 13:06:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:27,067 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2021-11-23 13:06:27,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2021-11-23 13:06:27,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 13:06:27,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:27,069 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:27,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:06:27,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 13:06:27,288 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2132388991, now seen corresponding path program 5 times [2021-11-23 13:06:27,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:27,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018661769] [2021-11-23 13:06:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:27,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 13:06:27,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:27,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018661769] [2021-11-23 13:06:27,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018661769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:06:27,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546579533] [2021-11-23 13:06:27,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:06:27,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:27,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:27,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:06:27,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:06:28,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-23 13:06:28,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:06:28,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:06:28,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 13:06:28,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:06:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 13:06:28,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546579533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:06:28,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:06:28,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2021-11-23 13:06:28,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448945704] [2021-11-23 13:06:28,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:06:28,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 13:06:28,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:28,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 13:06:28,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 13:06:28,555 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:28,730 INFO L93 Difference]: Finished difference Result 194 states and 258 transitions. [2021-11-23 13:06:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 13:06:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-23 13:06:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:28,732 INFO L225 Difference]: With dead ends: 194 [2021-11-23 13:06:28,732 INFO L226 Difference]: Without dead ends: 146 [2021-11-23 13:06:28,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 13:06:28,734 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:28,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 123 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:06:28,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-23 13:06:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-11-23 13:06:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2291666666666667) internal successors, (177), 144 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 177 transitions. [2021-11-23 13:06:28,746 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 177 transitions. Word has length 74 [2021-11-23 13:06:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:28,747 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 177 transitions. [2021-11-23 13:06:28,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 177 transitions. [2021-11-23 13:06:28,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 13:06:28,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:28,749 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:28,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:06:28,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:28,971 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash -478169085, now seen corresponding path program 6 times [2021-11-23 13:06:28,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:28,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639206103] [2021-11-23 13:06:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:28,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-23 13:06:29,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:29,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639206103] [2021-11-23 13:06:29,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639206103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:06:29,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650308665] [2021-11-23 13:06:29,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:06:29,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:29,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:29,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:06:29,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:06:30,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-11-23 13:06:30,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:06:30,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 13:06:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-23 13:06:30,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:06:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-23 13:06:31,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650308665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:06:31,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:06:31,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 17] total 56 [2021-11-23 13:06:31,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797565728] [2021-11-23 13:06:31,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:06:31,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 13:06:31,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:31,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 13:06:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=2260, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 13:06:31,427 INFO L87 Difference]: Start difference. First operand 145 states and 177 transitions. Second operand has 56 states, 56 states have (on average 2.75) internal successors, (154), 56 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:31,739 INFO L93 Difference]: Finished difference Result 340 states and 468 transitions. [2021-11-23 13:06:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-23 13:06:31,740 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.75) internal successors, (154), 56 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-23 13:06:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:31,742 INFO L225 Difference]: With dead ends: 340 [2021-11-23 13:06:31,742 INFO L226 Difference]: Without dead ends: 244 [2021-11-23 13:06:31,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=2260, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 13:06:31,749 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 163 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:31,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 227 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:06:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-23 13:06:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-11-23 13:06:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.2685950413223142) internal successors, (307), 242 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 307 transitions. [2021-11-23 13:06:31,778 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 307 transitions. Word has length 100 [2021-11-23 13:06:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:31,778 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 307 transitions. [2021-11-23 13:06:31,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.75) internal successors, (154), 56 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 307 transitions. [2021-11-23 13:06:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 13:06:31,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:31,790 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:31,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:06:32,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 13:06:32,004 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:32,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1848620027, now seen corresponding path program 7 times [2021-11-23 13:06:32,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:32,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46061464] [2021-11-23 13:06:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:32,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-11-23 13:06:32,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:32,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46061464] [2021-11-23 13:06:32,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46061464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:06:32,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935770499] [2021-11-23 13:06:32,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:06:32,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:32,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:32,470 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:06:32,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:06:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:32,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 13:06:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-11-23 13:06:32,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:06:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-11-23 13:06:33,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935770499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:06:33,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:06:33,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2021-11-23 13:06:33,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883499186] [2021-11-23 13:06:33,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:06:33,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 13:06:33,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 13:06:33,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 13:06:33,934 INFO L87 Difference]: Start difference. First operand 243 states and 307 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:34,118 INFO L93 Difference]: Finished difference Result 487 states and 640 transitions. [2021-11-23 13:06:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 13:06:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-23 13:06:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:34,122 INFO L225 Difference]: With dead ends: 487 [2021-11-23 13:06:34,122 INFO L226 Difference]: Without dead ends: 295 [2021-11-23 13:06:34,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 13:06:34,126 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:34,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 97 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:06:34,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-23 13:06:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2021-11-23 13:06:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.2210884353741496) internal successors, (359), 294 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:34,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 359 transitions. [2021-11-23 13:06:34,139 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 359 transitions. Word has length 150 [2021-11-23 13:06:34,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:34,139 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 359 transitions. [2021-11-23 13:06:34,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 359 transitions. [2021-11-23 13:06:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-23 13:06:34,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:34,142 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:34,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:06:34,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 13:06:34,371 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:34,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:34,371 INFO L85 PathProgramCache]: Analyzing trace with hash -709856071, now seen corresponding path program 8 times [2021-11-23 13:06:34,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:34,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208523259] [2021-11-23 13:06:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:34,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-11-23 13:06:35,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:35,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208523259] [2021-11-23 13:06:35,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208523259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:06:35,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077484558] [2021-11-23 13:06:35,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:06:35,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:35,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:35,727 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:06:35,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:06:35,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:06:35,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:06:35,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 13:06:35,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-11-23 13:06:36,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:06:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-11-23 13:06:39,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077484558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:06:39,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:06:39,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2021-11-23 13:06:39,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341012755] [2021-11-23 13:06:39,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:06:39,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-23 13:06:39,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:39,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-23 13:06:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-23 13:06:39,564 INFO L87 Difference]: Start difference. First operand 295 states and 359 transitions. Second operand has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:06:39,985 INFO L93 Difference]: Finished difference Result 591 states and 770 transitions. [2021-11-23 13:06:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-23 13:06:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-11-23 13:06:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:06:39,992 INFO L225 Difference]: With dead ends: 591 [2021-11-23 13:06:39,992 INFO L226 Difference]: Without dead ends: 399 [2021-11-23 13:06:39,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-23 13:06:39,997 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 153 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:06:39,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 97 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:06:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-23 13:06:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2021-11-23 13:06:40,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.1633165829145728) internal successors, (463), 398 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:40,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 463 transitions. [2021-11-23 13:06:40,012 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 463 transitions. Word has length 202 [2021-11-23 13:06:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:06:40,013 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 463 transitions. [2021-11-23 13:06:40,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:06:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 463 transitions. [2021-11-23 13:06:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-23 13:06:40,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:06:40,019 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:06:40,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:06:40,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 13:06:40,239 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:06:40,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:06:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash -213372895, now seen corresponding path program 9 times [2021-11-23 13:06:40,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:06:40,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717876608] [2021-11-23 13:06:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:06:40,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:06:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:06:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2021-11-23 13:06:44,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:06:44,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717876608] [2021-11-23 13:06:44,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717876608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:06:44,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579096101] [2021-11-23 13:06:44,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:06:44,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:06:44,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:06:44,186 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:06:44,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:06:52,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-11-23 13:06:52,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:06:52,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 13:06:52,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:06:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 204 proven. 1335 refuted. 0 times theorem prover too weak. 10201 trivial. 0 not checked. [2021-11-23 13:06:54,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:06:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 10404 trivial. 0 not checked. [2021-11-23 13:06:57,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579096101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:06:57,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:06:57,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 35, 33] total 169 [2021-11-23 13:06:57,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957294502] [2021-11-23 13:06:57,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:06:57,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2021-11-23 13:06:57,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:06:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2021-11-23 13:06:57,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7686, Invalid=20706, Unknown=0, NotChecked=0, Total=28392 [2021-11-23 13:06:57,229 INFO L87 Difference]: Start difference. First operand 399 states and 463 transitions. Second operand has 169 states, 169 states have (on average 2.4319526627218937) internal successors, (411), 169 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:07:02,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:07:02,140 INFO L93 Difference]: Finished difference Result 787 states and 1044 transitions. [2021-11-23 13:07:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-11-23 13:07:02,141 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.4319526627218937) internal successors, (411), 169 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2021-11-23 13:07:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:07:02,180 INFO L225 Difference]: With dead ends: 787 [2021-11-23 13:07:02,180 INFO L226 Difference]: Without dead ends: 595 [2021-11-23 13:07:02,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8774 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=11716, Invalid=41414, Unknown=0, NotChecked=0, Total=53130 [2021-11-23 13:07:02,185 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 688 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:07:02,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 253 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 13:07:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-23 13:07:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-23 13:07:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.2171717171717171) internal successors, (723), 594 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:07:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 723 transitions. [2021-11-23 13:07:02,212 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 723 transitions. Word has length 306 [2021-11-23 13:07:02,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:07:02,212 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 723 transitions. [2021-11-23 13:07:02,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.4319526627218937) internal successors, (411), 169 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:07:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 723 transitions. [2021-11-23 13:07:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-11-23 13:07:02,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:07:02,222 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:07:02,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:07:02,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:07:02,444 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:07:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:07:02,445 INFO L85 PathProgramCache]: Analyzing trace with hash 792529061, now seen corresponding path program 10 times [2021-11-23 13:07:02,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:07:02,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363142276] [2021-11-23 13:07:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:07:02,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:07:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:07:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16552 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2021-11-23 13:07:06,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:07:06,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363142276] [2021-11-23 13:07:06,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363142276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:07:06,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299557246] [2021-11-23 13:07:06,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:07:06,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:07:06,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:07:06,339 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:07:06,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:07:06,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:07:06,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:07:06,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-23 13:07:06,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:07:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16552 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2021-11-23 13:07:07,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:07:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16552 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2021-11-23 13:07:18,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299557246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:07:18,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:07:18,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2021-11-23 13:07:18,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186804957] [2021-11-23 13:07:18,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:07:18,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2021-11-23 13:07:18,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:07:18,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2021-11-23 13:07:18,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2021-11-23 13:07:18,399 INFO L87 Difference]: Start difference. First operand 595 states and 723 transitions. Second operand has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:07:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:07:19,531 INFO L93 Difference]: Finished difference Result 1191 states and 1552 transitions. [2021-11-23 13:07:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-11-23 13:07:19,532 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 406 [2021-11-23 13:07:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:07:19,536 INFO L225 Difference]: With dead ends: 1191 [2021-11-23 13:07:19,537 INFO L226 Difference]: Without dead ends: 807 [2021-11-23 13:07:19,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 706 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2021-11-23 13:07:19,542 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 315 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:07:19,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 173 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:07:19,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-11-23 13:07:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2021-11-23 13:07:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.1600496277915633) internal successors, (935), 806 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:07:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 935 transitions. [2021-11-23 13:07:19,582 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 935 transitions. Word has length 406 [2021-11-23 13:07:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:07:19,583 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 935 transitions. [2021-11-23 13:07:19,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:07:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 935 transitions. [2021-11-23 13:07:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2021-11-23 13:07:19,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:07:19,601 INFO L514 BasicCegarLoop]: trace histogram [210, 210, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:07:19,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:07:19,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 13:07:19,827 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:07:19,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:07:19,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1976201735, now seen corresponding path program 11 times [2021-11-23 13:07:19,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:07:19,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729585376] [2021-11-23 13:07:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:07:19,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:07:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:07:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49836 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2021-11-23 13:07:34,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:07:34,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729585376] [2021-11-23 13:07:34,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729585376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:07:34,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494356317] [2021-11-23 13:07:34,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:07:34,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:07:34,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:07:34,447 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:07:34,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_318b1557-608f-43c5-9ff7-19b39c5331c4/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process