./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label21.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label21.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa --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 cddd396d9051dbeeab842f0229e49128c7a3af364245c973ac8bbf7d2e9e624d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:12:24,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:12:24,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:12:24,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:12:24,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:12:24,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:12:24,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:12:24,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:12:24,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:12:24,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:12:24,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:12:24,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:12:24,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:12:24,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:12:24,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:12:24,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:12:24,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:12:24,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:12:24,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:12:24,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:12:24,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:12:24,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:12:24,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:12:24,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:12:24,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:12:24,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:12:24,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:12:24,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:12:24,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:12:24,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:12:24,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:12:24,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:12:24,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:12:24,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:12:24,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:12:24,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:12:24,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:12:24,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:12:24,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:12:24,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:12:24,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:12:24,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:12:24,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:12:24,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:12:24,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:12:24,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:12:24,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:12:24,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:12:24,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:12:24,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:12:24,725 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:12:24,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:12:24,725 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:12:24,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:12:24,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:12:24,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:12:24,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:12:24,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:12:24,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:12:24,727 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:12:24,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:12:24,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:12:24,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:12:24,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:12:24,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:12:24,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:12:24,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:12:24,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:12:24,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:12:24,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:12:24,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:12:24,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:12:24,729 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:12:24,729 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:12:24,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:12:24,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:12:24,730 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_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cddd396d9051dbeeab842f0229e49128c7a3af364245c973ac8bbf7d2e9e624d [2021-12-07 00:12:24,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:12:24,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:12:24,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:12:24,940 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:12:24,941 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:12:24,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem03_label21.c [2021-12-07 00:12:24,990 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/data/489d2efd5/bb850c23352040359badaab84d4153e0/FLAGd968d69af [2021-12-07 00:12:25,475 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:12:25,475 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/sv-benchmarks/c/eca-rers2012/Problem03_label21.c [2021-12-07 00:12:25,489 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/data/489d2efd5/bb850c23352040359badaab84d4153e0/FLAGd968d69af [2021-12-07 00:12:25,769 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/data/489d2efd5/bb850c23352040359badaab84d4153e0 [2021-12-07 00:12:25,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:12:25,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:12:25,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:12:25,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:12:25,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:12:25,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:12:25" (1/1) ... [2021-12-07 00:12:25,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@223d3ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:25, skipping insertion in model container [2021-12-07 00:12:25,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:12:25" (1/1) ... [2021-12-07 00:12:25,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:12:25,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:12:26,182 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_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/sv-benchmarks/c/eca-rers2012/Problem03_label21.c[61500,61513] [2021-12-07 00:12:26,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:12:26,205 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:12:26,349 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_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/sv-benchmarks/c/eca-rers2012/Problem03_label21.c[61500,61513] [2021-12-07 00:12:26,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:12:26,366 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:12:26,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26 WrapperNode [2021-12-07 00:12:26,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:12:26,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:12:26,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:12:26,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:12:26,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26" (1/1) ... [2021-12-07 00:12:26,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26" (1/1) ... [2021-12-07 00:12:26,463 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-07 00:12:26,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:12:26,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:12:26,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:12:26,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:12:26,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26" (1/1) ... [2021-12-07 00:12:26,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26" (1/1) ... [2021-12-07 00:12:26,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26" (1/1) ... [2021-12-07 00:12:26,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26" (1/1) ... [2021-12-07 00:12:26,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26" (1/1) ... [2021-12-07 00:12:26,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26" (1/1) ... [2021-12-07 00:12:26,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26" (1/1) ... [2021-12-07 00:12:26,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:12:26,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:12:26,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:12:26,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:12:26,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26" (1/1) ... [2021-12-07 00:12:26,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:12:26,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:26,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:12:26,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:12:26,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:12:26,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:12:26,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:12:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:12:26,662 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:12:26,664 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:12:27,700 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:12:27,709 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:12:27,710 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 00:12:27,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:12:27 BoogieIcfgContainer [2021-12-07 00:12:27,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:12:27,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:12:27,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:12:27,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:12:27,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:12:25" (1/3) ... [2021-12-07 00:12:27,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3577669c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:12:27, skipping insertion in model container [2021-12-07 00:12:27,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:26" (2/3) ... [2021-12-07 00:12:27,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3577669c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:12:27, skipping insertion in model container [2021-12-07 00:12:27,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:12:27" (3/3) ... [2021-12-07 00:12:27,717 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label21.c [2021-12-07 00:12:27,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:12:27,722 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:12:27,757 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:12:27,763 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 [2021-12-07 00:12:27,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:12:27,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-07 00:12:27,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:27,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:27,797 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash 759114634, now seen corresponding path program 1 times [2021-12-07 00:12:27,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:27,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503876231] [2021-12-07 00:12:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:27,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:28,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:28,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503876231] [2021-12-07 00:12:28,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503876231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:28,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:28,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:28,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83392232] [2021-12-07 00:12:28,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:28,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:28,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:28,248 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:28,977 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2021-12-07 00:12:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:28,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-12-07 00:12:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:28,991 INFO L225 Difference]: With dead ends: 857 [2021-12-07 00:12:28,991 INFO L226 Difference]: Without dead ends: 462 [2021-12-07 00:12:28,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:28,997 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 86 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:28,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 00:12:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-07 00:12:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-12-07 00:12:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2021-12-07 00:12:29,042 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 202 [2021-12-07 00:12:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:29,043 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2021-12-07 00:12:29,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:29,043 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2021-12-07 00:12:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-07 00:12:29,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:29,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:29,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:12:29,048 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:29,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:29,049 INFO L85 PathProgramCache]: Analyzing trace with hash -473411991, now seen corresponding path program 1 times [2021-12-07 00:12:29,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:29,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518170267] [2021-12-07 00:12:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:29,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:29,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:29,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518170267] [2021-12-07 00:12:29,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518170267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:29,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:29,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:29,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542064780] [2021-12-07 00:12:29,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:29,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:29,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:29,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:29,167 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:29,710 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2021-12-07 00:12:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:29,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 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 210 [2021-12-07 00:12:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:29,715 INFO L225 Difference]: With dead ends: 1344 [2021-12-07 00:12:29,715 INFO L226 Difference]: Without dead ends: 886 [2021-12-07 00:12:29,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:29,717 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:29,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:12:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-07 00:12:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2021-12-07 00:12:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5120828538550057) internal successors, (1314), 869 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1314 transitions. [2021-12-07 00:12:29,746 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1314 transitions. Word has length 210 [2021-12-07 00:12:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:29,746 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1314 transitions. [2021-12-07 00:12:29,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1314 transitions. [2021-12-07 00:12:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-07 00:12:29,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:29,750 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:29,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:12:29,751 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:29,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1818915280, now seen corresponding path program 1 times [2021-12-07 00:12:29,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:29,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058878013] [2021-12-07 00:12:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:29,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:12:29,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:29,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058878013] [2021-12-07 00:12:29,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058878013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:29,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:29,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:12:29,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989293616] [2021-12-07 00:12:29,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:29,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:29,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:29,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:29,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:29,820 INFO L87 Difference]: Start difference. First operand 870 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:30,379 INFO L93 Difference]: Finished difference Result 2554 states and 3869 transitions. [2021-12-07 00:12:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-12-07 00:12:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:30,387 INFO L225 Difference]: With dead ends: 2554 [2021-12-07 00:12:30,387 INFO L226 Difference]: Without dead ends: 1686 [2021-12-07 00:12:30,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:30,389 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 233 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:30,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 416 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:12:30,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-12-07 00:12:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1684. [2021-12-07 00:12:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.3368983957219251) internal successors, (2250), 1683 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2250 transitions. [2021-12-07 00:12:30,424 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2250 transitions. Word has length 222 [2021-12-07 00:12:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:30,424 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 2250 transitions. [2021-12-07 00:12:30,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2250 transitions. [2021-12-07 00:12:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-07 00:12:30,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:30,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:30,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:12:30,430 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash -111387987, now seen corresponding path program 1 times [2021-12-07 00:12:30,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:30,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209067610] [2021-12-07 00:12:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:30,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:30,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:30,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209067610] [2021-12-07 00:12:30,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209067610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:30,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:30,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:30,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900452688] [2021-12-07 00:12:30,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:30,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:30,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:30,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:30,493 INFO L87 Difference]: Start difference. First operand 1684 states and 2250 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:31,023 INFO L93 Difference]: Finished difference Result 5017 states and 6710 transitions. [2021-12-07 00:12:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:31,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2021-12-07 00:12:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:31,036 INFO L225 Difference]: With dead ends: 5017 [2021-12-07 00:12:31,036 INFO L226 Difference]: Without dead ends: 3335 [2021-12-07 00:12:31,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:31,040 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:31,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 123 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:12:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-12-07 00:12:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3326. [2021-12-07 00:12:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.323609022556391) internal successors, (4401), 3325 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:31,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4401 transitions. [2021-12-07 00:12:31,100 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4401 transitions. Word has length 225 [2021-12-07 00:12:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:31,100 INFO L470 AbstractCegarLoop]: Abstraction has 3326 states and 4401 transitions. [2021-12-07 00:12:31,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4401 transitions. [2021-12-07 00:12:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-07 00:12:31,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:31,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:31,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:12:31,107 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:31,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2111784939, now seen corresponding path program 1 times [2021-12-07 00:12:31,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:31,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157819322] [2021-12-07 00:12:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:31,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:31,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:31,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157819322] [2021-12-07 00:12:31,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157819322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:31,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:31,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:31,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906246277] [2021-12-07 00:12:31,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:31,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:31,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:31,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:31,166 INFO L87 Difference]: Start difference. First operand 3326 states and 4401 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:31,709 INFO L93 Difference]: Finished difference Result 9926 states and 13150 transitions. [2021-12-07 00:12:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:31,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2021-12-07 00:12:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:31,733 INFO L225 Difference]: With dead ends: 9926 [2021-12-07 00:12:31,734 INFO L226 Difference]: Without dead ends: 6602 [2021-12-07 00:12:31,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:31,738 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 217 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:31,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 168 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:12:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6602 states. [2021-12-07 00:12:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6602 to 5768. [2021-12-07 00:12:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5768 states, 5767 states have (on average 1.3370903415987516) internal successors, (7711), 5767 states have internal predecessors, (7711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5768 states to 5768 states and 7711 transitions. [2021-12-07 00:12:31,842 INFO L78 Accepts]: Start accepts. Automaton has 5768 states and 7711 transitions. Word has length 228 [2021-12-07 00:12:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:31,843 INFO L470 AbstractCegarLoop]: Abstraction has 5768 states and 7711 transitions. [2021-12-07 00:12:31,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:31,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5768 states and 7711 transitions. [2021-12-07 00:12:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-07 00:12:31,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:31,852 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:31,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:12:31,853 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash -763713095, now seen corresponding path program 1 times [2021-12-07 00:12:31,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:31,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374173137] [2021-12-07 00:12:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:31,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-07 00:12:31,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:31,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374173137] [2021-12-07 00:12:31,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374173137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:31,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:31,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:31,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067368701] [2021-12-07 00:12:31,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:31,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:31,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:31,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:31,933 INFO L87 Difference]: Start difference. First operand 5768 states and 7711 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:32,504 INFO L93 Difference]: Finished difference Result 15634 states and 21105 transitions. [2021-12-07 00:12:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:32,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 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 237 [2021-12-07 00:12:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:32,539 INFO L225 Difference]: With dead ends: 15634 [2021-12-07 00:12:32,539 INFO L226 Difference]: Without dead ends: 9868 [2021-12-07 00:12:32,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:32,544 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:32,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 188 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:12:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2021-12-07 00:12:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 9643. [2021-12-07 00:12:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9643 states, 9642 states have (on average 1.3566687409251192) internal successors, (13081), 9642 states have internal predecessors, (13081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9643 states to 9643 states and 13081 transitions. [2021-12-07 00:12:32,710 INFO L78 Accepts]: Start accepts. Automaton has 9643 states and 13081 transitions. Word has length 237 [2021-12-07 00:12:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:32,710 INFO L470 AbstractCegarLoop]: Abstraction has 9643 states and 13081 transitions. [2021-12-07 00:12:32,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 9643 states and 13081 transitions. [2021-12-07 00:12:32,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-07 00:12:32,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:32,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:32,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 00:12:32,724 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash -833950386, now seen corresponding path program 1 times [2021-12-07 00:12:32,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:32,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508611438] [2021-12-07 00:12:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:32,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:32,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:32,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508611438] [2021-12-07 00:12:32,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508611438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:32,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025329242] [2021-12-07 00:12:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:32,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:32,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:32,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:32,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:12:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:32,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:12:32,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:12:33,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:12:33,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025329242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:33,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:12:33,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-07 00:12:33,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34111183] [2021-12-07 00:12:33,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:33,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:33,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:33,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:33,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:12:33,219 INFO L87 Difference]: Start difference. First operand 9643 states and 13081 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:33,767 INFO L93 Difference]: Finished difference Result 24980 states and 34055 transitions. [2021-12-07 00:12:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:33,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 240 [2021-12-07 00:12:33,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:33,802 INFO L225 Difference]: With dead ends: 24980 [2021-12-07 00:12:33,802 INFO L226 Difference]: Without dead ends: 15746 [2021-12-07 00:12:33,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:12:33,811 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 41 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:33,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 426 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:12:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15746 states. [2021-12-07 00:12:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15746 to 15736. [2021-12-07 00:12:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15736 states, 15735 states have (on average 1.3225929456625358) internal successors, (20811), 15735 states have internal predecessors, (20811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15736 states to 15736 states and 20811 transitions. [2021-12-07 00:12:34,010 INFO L78 Accepts]: Start accepts. Automaton has 15736 states and 20811 transitions. Word has length 240 [2021-12-07 00:12:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:34,010 INFO L470 AbstractCegarLoop]: Abstraction has 15736 states and 20811 transitions. [2021-12-07 00:12:34,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 15736 states and 20811 transitions. [2021-12-07 00:12:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-07 00:12:34,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:34,027 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:34,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:12:34,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 00:12:34,229 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:34,231 INFO L85 PathProgramCache]: Analyzing trace with hash 714204802, now seen corresponding path program 1 times [2021-12-07 00:12:34,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:34,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887629928] [2021-12-07 00:12:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:34,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-07 00:12:34,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:34,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887629928] [2021-12-07 00:12:34,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887629928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:34,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:34,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:34,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614522825] [2021-12-07 00:12:34,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:34,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:34,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:34,325 INFO L87 Difference]: Start difference. First operand 15736 states and 20811 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:34,904 INFO L93 Difference]: Finished difference Result 35949 states and 47615 transitions. [2021-12-07 00:12:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:34,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 247 [2021-12-07 00:12:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:34,931 INFO L225 Difference]: With dead ends: 35949 [2021-12-07 00:12:34,931 INFO L226 Difference]: Without dead ends: 20215 [2021-12-07 00:12:34,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:34,944 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 204 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:34,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 173 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:12:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20215 states. [2021-12-07 00:12:35,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20215 to 20202. [2021-12-07 00:12:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20202 states, 20201 states have (on average 1.3050839067372901) internal successors, (26364), 20201 states have internal predecessors, (26364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20202 states to 20202 states and 26364 transitions. [2021-12-07 00:12:35,207 INFO L78 Accepts]: Start accepts. Automaton has 20202 states and 26364 transitions. Word has length 247 [2021-12-07 00:12:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:35,207 INFO L470 AbstractCegarLoop]: Abstraction has 20202 states and 26364 transitions. [2021-12-07 00:12:35,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 20202 states and 26364 transitions. [2021-12-07 00:12:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-07 00:12:35,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:35,226 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:35,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 00:12:35,227 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:35,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1987674821, now seen corresponding path program 1 times [2021-12-07 00:12:35,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:35,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103947553] [2021-12-07 00:12:35,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:35,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-07 00:12:35,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:35,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103947553] [2021-12-07 00:12:35,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103947553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:35,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:35,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:12:35,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777173177] [2021-12-07 00:12:35,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:35,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:35,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:35,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:35,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:35,349 INFO L87 Difference]: Start difference. First operand 20202 states and 26364 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:35,874 INFO L93 Difference]: Finished difference Result 42037 states and 54660 transitions. [2021-12-07 00:12:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:35,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 250 [2021-12-07 00:12:35,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:35,902 INFO L225 Difference]: With dead ends: 42037 [2021-12-07 00:12:35,902 INFO L226 Difference]: Without dead ends: 22447 [2021-12-07 00:12:35,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:35,917 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 202 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:35,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 423 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:12:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22447 states. [2021-12-07 00:12:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22447 to 22443. [2021-12-07 00:12:36,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22443 states, 22442 states have (on average 1.2857588450227253) internal successors, (28855), 22442 states have internal predecessors, (28855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22443 states to 22443 states and 28855 transitions. [2021-12-07 00:12:36,173 INFO L78 Accepts]: Start accepts. Automaton has 22443 states and 28855 transitions. Word has length 250 [2021-12-07 00:12:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:36,173 INFO L470 AbstractCegarLoop]: Abstraction has 22443 states and 28855 transitions. [2021-12-07 00:12:36,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand 22443 states and 28855 transitions. [2021-12-07 00:12:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-07 00:12:36,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:36,197 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:36,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-07 00:12:36,197 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:36,197 INFO L85 PathProgramCache]: Analyzing trace with hash 117900151, now seen corresponding path program 1 times [2021-12-07 00:12:36,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:36,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753539904] [2021-12-07 00:12:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:36,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-07 00:12:36,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:36,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753539904] [2021-12-07 00:12:36,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753539904] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:36,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338984602] [2021-12-07 00:12:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:36,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:36,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:36,287 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:36,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:12:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:36,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 00:12:36,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 00:12:36,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:12:36,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338984602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:36,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:12:36,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-07 00:12:36,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848888464] [2021-12-07 00:12:36,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:36,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:36,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:36,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:36,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:12:36,607 INFO L87 Difference]: Start difference. First operand 22443 states and 28855 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:37,169 INFO L93 Difference]: Finished difference Result 58315 states and 75049 transitions. [2021-12-07 00:12:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 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 254 [2021-12-07 00:12:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:37,207 INFO L225 Difference]: With dead ends: 58315 [2021-12-07 00:12:37,207 INFO L226 Difference]: Without dead ends: 36077 [2021-12-07 00:12:37,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:12:37,222 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 235 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:37,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 160 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:12:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36077 states. [2021-12-07 00:12:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36077 to 34853. [2021-12-07 00:12:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34853 states, 34852 states have (on average 1.259468610122805) internal successors, (43895), 34852 states have internal predecessors, (43895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34853 states to 34853 states and 43895 transitions. [2021-12-07 00:12:37,663 INFO L78 Accepts]: Start accepts. Automaton has 34853 states and 43895 transitions. Word has length 254 [2021-12-07 00:12:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:37,664 INFO L470 AbstractCegarLoop]: Abstraction has 34853 states and 43895 transitions. [2021-12-07 00:12:37,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 34853 states and 43895 transitions. [2021-12-07 00:12:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-07 00:12:37,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:37,686 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:37,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:12:37,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:12:37,888 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 772884218, now seen corresponding path program 1 times [2021-12-07 00:12:37,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:37,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523556244] [2021-12-07 00:12:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:37,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:12:38,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:38,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523556244] [2021-12-07 00:12:38,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523556244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:38,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:38,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:38,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512203281] [2021-12-07 00:12:38,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:38,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:38,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:38,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:38,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:38,036 INFO L87 Difference]: Start difference. First operand 34853 states and 43895 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:38,674 INFO L93 Difference]: Finished difference Result 76644 states and 96219 transitions. [2021-12-07 00:12:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:38,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 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 256 [2021-12-07 00:12:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:38,716 INFO L225 Difference]: With dead ends: 76644 [2021-12-07 00:12:38,716 INFO L226 Difference]: Without dead ends: 42606 [2021-12-07 00:12:38,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:38,739 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 197 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:38,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 202 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:12:38,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42606 states. [2021-12-07 00:12:39,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42606 to 42592. [2021-12-07 00:12:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42592 states, 42591 states have (on average 1.244887417529525) internal successors, (53021), 42591 states have internal predecessors, (53021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42592 states to 42592 states and 53021 transitions. [2021-12-07 00:12:39,185 INFO L78 Accepts]: Start accepts. Automaton has 42592 states and 53021 transitions. Word has length 256 [2021-12-07 00:12:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:39,185 INFO L470 AbstractCegarLoop]: Abstraction has 42592 states and 53021 transitions. [2021-12-07 00:12:39,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 42592 states and 53021 transitions. [2021-12-07 00:12:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-07 00:12:39,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:39,256 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:39,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-07 00:12:39,256 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1474620837, now seen corresponding path program 2 times [2021-12-07 00:12:39,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:39,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352266901] [2021-12-07 00:12:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:39,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-07 00:12:39,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:39,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352266901] [2021-12-07 00:12:39,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352266901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:39,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:39,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:12:39,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125266051] [2021-12-07 00:12:39,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:39,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:39,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:39,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:39,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:39,331 INFO L87 Difference]: Start difference. First operand 42592 states and 53021 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:39,801 INFO L93 Difference]: Finished difference Result 115135 states and 143166 transitions. [2021-12-07 00:12:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:39,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 263 [2021-12-07 00:12:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:39,881 INFO L225 Difference]: With dead ends: 115135 [2021-12-07 00:12:39,881 INFO L226 Difference]: Without dead ends: 73967 [2021-12-07 00:12:39,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:39,910 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 332 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:39,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 950 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:12:39,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73967 states. [2021-12-07 00:12:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73967 to 73964. [2021-12-07 00:12:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73964 states, 73963 states have (on average 1.220880710625583) internal successors, (90300), 73963 states have internal predecessors, (90300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73964 states to 73964 states and 90300 transitions. [2021-12-07 00:12:40,786 INFO L78 Accepts]: Start accepts. Automaton has 73964 states and 90300 transitions. Word has length 263 [2021-12-07 00:12:40,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:40,786 INFO L470 AbstractCegarLoop]: Abstraction has 73964 states and 90300 transitions. [2021-12-07 00:12:40,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:40,787 INFO L276 IsEmpty]: Start isEmpty. Operand 73964 states and 90300 transitions. [2021-12-07 00:12:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-07 00:12:40,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:40,823 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:40,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 00:12:40,823 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:40,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1180862349, now seen corresponding path program 1 times [2021-12-07 00:12:40,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:40,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151764914] [2021-12-07 00:12:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:40,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-07 00:12:41,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:41,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151764914] [2021-12-07 00:12:41,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151764914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:41,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456783613] [2021-12-07 00:12:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:41,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:41,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:41,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:41,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:12:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:41,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 00:12:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:12:41,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:12:41,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456783613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:41,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:12:41,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-07 00:12:41,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833467853] [2021-12-07 00:12:41,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:41,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:41,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:41,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:41,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:12:41,311 INFO L87 Difference]: Start difference. First operand 73964 states and 90300 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:42,154 INFO L93 Difference]: Finished difference Result 171071 states and 211774 transitions. [2021-12-07 00:12:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:42,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 269 [2021-12-07 00:12:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:42,328 INFO L225 Difference]: With dead ends: 171071 [2021-12-07 00:12:42,328 INFO L226 Difference]: Without dead ends: 97922 [2021-12-07 00:12:42,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:12:42,343 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 225 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:42,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 171 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:12:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97922 states. [2021-12-07 00:12:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97922 to 97512. [2021-12-07 00:12:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97512 states, 97511 states have (on average 1.1853021710371137) internal successors, (115580), 97511 states have internal predecessors, (115580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97512 states to 97512 states and 115580 transitions. [2021-12-07 00:12:43,439 INFO L78 Accepts]: Start accepts. Automaton has 97512 states and 115580 transitions. Word has length 269 [2021-12-07 00:12:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:43,439 INFO L470 AbstractCegarLoop]: Abstraction has 97512 states and 115580 transitions. [2021-12-07 00:12:43,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 97512 states and 115580 transitions. [2021-12-07 00:12:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-12-07 00:12:43,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:43,501 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:43,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:12:43,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:43,703 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:43,704 INFO L85 PathProgramCache]: Analyzing trace with hash -501666793, now seen corresponding path program 1 times [2021-12-07 00:12:43,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:43,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299884549] [2021-12-07 00:12:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:43,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-07 00:12:43,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:43,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299884549] [2021-12-07 00:12:43,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299884549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:43,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:43,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:12:43,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943966571] [2021-12-07 00:12:43,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:43,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:43,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:43,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:43,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:43,782 INFO L87 Difference]: Start difference. First operand 97512 states and 115580 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:44,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:44,901 INFO L93 Difference]: Finished difference Result 205215 states and 243215 transitions. [2021-12-07 00:12:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:44,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 273 [2021-12-07 00:12:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:45,011 INFO L225 Difference]: With dead ends: 205215 [2021-12-07 00:12:45,011 INFO L226 Difference]: Without dead ends: 108518 [2021-12-07 00:12:45,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:45,036 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:45,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 402 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:12:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108518 states. [2021-12-07 00:12:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108518 to 91822. [2021-12-07 00:12:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91822 states, 91821 states have (on average 1.1823983620304723) internal successors, (108569), 91821 states have internal predecessors, (108569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91822 states to 91822 states and 108569 transitions. [2021-12-07 00:12:46,017 INFO L78 Accepts]: Start accepts. Automaton has 91822 states and 108569 transitions. Word has length 273 [2021-12-07 00:12:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:46,018 INFO L470 AbstractCegarLoop]: Abstraction has 91822 states and 108569 transitions. [2021-12-07 00:12:46,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 91822 states and 108569 transitions. [2021-12-07 00:12:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-12-07 00:12:46,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:46,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:46,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 00:12:46,055 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:46,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1327403094, now seen corresponding path program 1 times [2021-12-07 00:12:46,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:46,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126561988] [2021-12-07 00:12:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:46,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:46,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126561988] [2021-12-07 00:12:46,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126561988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:46,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:46,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:46,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535170618] [2021-12-07 00:12:46,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:46,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:46,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:46,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:46,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:46,149 INFO L87 Difference]: Start difference. First operand 91822 states and 108569 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 2 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:47,078 INFO L93 Difference]: Finished difference Result 183237 states and 216699 transitions. [2021-12-07 00:12:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:47,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 2 states have internal predecessors, (276), 0 states have call successors, (0), 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 276 [2021-12-07 00:12:47,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:47,183 INFO L225 Difference]: With dead ends: 183237 [2021-12-07 00:12:47,183 INFO L226 Difference]: Without dead ends: 92230 [2021-12-07 00:12:47,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:47,224 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:47,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 199 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:12:47,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92230 states. [2021-12-07 00:12:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92230 to 92228. [2021-12-07 00:12:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92228 states, 92227 states have (on average 1.1820833378511715) internal successors, (109020), 92227 states have internal predecessors, (109020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92228 states to 92228 states and 109020 transitions. [2021-12-07 00:12:48,307 INFO L78 Accepts]: Start accepts. Automaton has 92228 states and 109020 transitions. Word has length 276 [2021-12-07 00:12:48,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:48,307 INFO L470 AbstractCegarLoop]: Abstraction has 92228 states and 109020 transitions. [2021-12-07 00:12:48,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 2 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 92228 states and 109020 transitions. [2021-12-07 00:12:48,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-07 00:12:48,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:48,370 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:48,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 00:12:48,370 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:48,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1357197404, now seen corresponding path program 1 times [2021-12-07 00:12:48,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:48,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124355655] [2021-12-07 00:12:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:48,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 00:12:48,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:48,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124355655] [2021-12-07 00:12:48,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124355655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:48,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:48,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:12:48,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652980281] [2021-12-07 00:12:48,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:48,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:12:48,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:12:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:12:48,463 INFO L87 Difference]: Start difference. First operand 92228 states and 109020 transitions. Second operand has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:49,652 INFO L93 Difference]: Finished difference Result 183712 states and 217243 transitions. [2021-12-07 00:12:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:12:49,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 289 [2021-12-07 00:12:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:49,742 INFO L225 Difference]: With dead ends: 183712 [2021-12-07 00:12:49,742 INFO L226 Difference]: Without dead ends: 92705 [2021-12-07 00:12:49,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:12:49,781 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 439 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:49,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 198 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 00:12:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92705 states. [2021-12-07 00:12:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92705 to 89792. [2021-12-07 00:12:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89792 states, 89791 states have (on average 1.1839493935917853) internal successors, (106308), 89791 states have internal predecessors, (106308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89792 states to 89792 states and 106308 transitions. [2021-12-07 00:12:50,733 INFO L78 Accepts]: Start accepts. Automaton has 89792 states and 106308 transitions. Word has length 289 [2021-12-07 00:12:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:50,733 INFO L470 AbstractCegarLoop]: Abstraction has 89792 states and 106308 transitions. [2021-12-07 00:12:50,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 89792 states and 106308 transitions. [2021-12-07 00:12:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-12-07 00:12:50,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:50,781 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:50,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-07 00:12:50,781 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:50,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1523993361, now seen corresponding path program 1 times [2021-12-07 00:12:50,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:50,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935992473] [2021-12-07 00:12:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:50,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 109 proven. 6 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-07 00:12:50,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:50,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935992473] [2021-12-07 00:12:50,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935992473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:50,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217718823] [2021-12-07 00:12:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:50,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:50,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:50,858 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:50,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:12:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:50,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 00:12:50,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-07 00:12:51,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:12:51,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217718823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:51,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:12:51,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-07 00:12:51,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172681284] [2021-12-07 00:12:51,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:51,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:51,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:51,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:51,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:12:51,198 INFO L87 Difference]: Start difference. First operand 89792 states and 106308 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:52,114 INFO L93 Difference]: Finished difference Result 174156 states and 205571 transitions. [2021-12-07 00:12:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:52,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 296 [2021-12-07 00:12:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:52,206 INFO L225 Difference]: With dead ends: 174156 [2021-12-07 00:12:52,207 INFO L226 Difference]: Without dead ends: 84772 [2021-12-07 00:12:52,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:12:52,250 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:52,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 355 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:12:52,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84772 states. [2021-12-07 00:12:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84772 to 84514. [2021-12-07 00:12:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84514 states, 84513 states have (on average 1.1679031628270207) internal successors, (98703), 84513 states have internal predecessors, (98703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84514 states to 84514 states and 98703 transitions. [2021-12-07 00:12:53,332 INFO L78 Accepts]: Start accepts. Automaton has 84514 states and 98703 transitions. Word has length 296 [2021-12-07 00:12:53,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:53,332 INFO L470 AbstractCegarLoop]: Abstraction has 84514 states and 98703 transitions. [2021-12-07 00:12:53,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,332 INFO L276 IsEmpty]: Start isEmpty. Operand 84514 states and 98703 transitions. [2021-12-07 00:12:53,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-07 00:12:53,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:53,380 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:53,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:12:53,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:53,582 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:53,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:53,583 INFO L85 PathProgramCache]: Analyzing trace with hash -690862162, now seen corresponding path program 1 times [2021-12-07 00:12:53,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:53,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741637523] [2021-12-07 00:12:53,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:53,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-07 00:12:53,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:53,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741637523] [2021-12-07 00:12:53,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741637523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:53,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:53,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:12:53,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187033071] [2021-12-07 00:12:53,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:53,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:12:53,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:12:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:12:53,687 INFO L87 Difference]: Start difference. First operand 84514 states and 98703 transitions. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:54,428 INFO L93 Difference]: Finished difference Result 132525 states and 154559 transitions. [2021-12-07 00:12:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:12:54,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 297 [2021-12-07 00:12:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:54,471 INFO L225 Difference]: With dead ends: 132525 [2021-12-07 00:12:54,471 INFO L226 Difference]: Without dead ends: 49029 [2021-12-07 00:12:54,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:12:54,497 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 550 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:54,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 55 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:12:54,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49029 states. [2021-12-07 00:12:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49029 to 47811. [2021-12-07 00:12:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47811 states, 47810 states have (on average 1.1191800878477307) internal successors, (53508), 47810 states have internal predecessors, (53508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47811 states to 47811 states and 53508 transitions. [2021-12-07 00:12:55,104 INFO L78 Accepts]: Start accepts. Automaton has 47811 states and 53508 transitions. Word has length 297 [2021-12-07 00:12:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:55,105 INFO L470 AbstractCegarLoop]: Abstraction has 47811 states and 53508 transitions. [2021-12-07 00:12:55,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 47811 states and 53508 transitions. [2021-12-07 00:12:55,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-07 00:12:55,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:55,128 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:55,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-07 00:12:55,129 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash -945864307, now seen corresponding path program 1 times [2021-12-07 00:12:55,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:55,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417215909] [2021-12-07 00:12:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:55,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-07 00:12:55,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:55,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417215909] [2021-12-07 00:12:55,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417215909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:55,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:55,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:55,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720749754] [2021-12-07 00:12:55,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:55,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:55,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:55,199 INFO L87 Difference]: Start difference. First operand 47811 states and 53508 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:55,803 INFO L93 Difference]: Finished difference Result 107629 states and 120822 transitions. [2021-12-07 00:12:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:55,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 states have internal predecessors, (237), 0 states have call successors, (0), 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 310 [2021-12-07 00:12:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:55,858 INFO L225 Difference]: With dead ends: 107629 [2021-12-07 00:12:55,859 INFO L226 Difference]: Without dead ends: 60836 [2021-12-07 00:12:55,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:55,882 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 206 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:55,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 145 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:12:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60836 states. [2021-12-07 00:12:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60836 to 60019. [2021-12-07 00:12:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60019 states, 60018 states have (on average 1.1249958345829585) internal successors, (67520), 60018 states have internal predecessors, (67520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60019 states to 60019 states and 67520 transitions. [2021-12-07 00:12:56,601 INFO L78 Accepts]: Start accepts. Automaton has 60019 states and 67520 transitions. Word has length 310 [2021-12-07 00:12:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:56,602 INFO L470 AbstractCegarLoop]: Abstraction has 60019 states and 67520 transitions. [2021-12-07 00:12:56,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 60019 states and 67520 transitions. [2021-12-07 00:12:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-12-07 00:12:56,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:56,628 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:56,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-07 00:12:56,628 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:56,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1322317302, now seen corresponding path program 1 times [2021-12-07 00:12:56,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:56,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11266269] [2021-12-07 00:12:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:56,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-07 00:12:56,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11266269] [2021-12-07 00:12:56,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11266269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:56,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:56,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:12:56,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935801863] [2021-12-07 00:12:56,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:56,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:12:56,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:56,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:12:56,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:12:56,717 INFO L87 Difference]: Start difference. First operand 60019 states and 67520 transitions. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:57,565 INFO L93 Difference]: Finished difference Result 111913 states and 125427 transitions. [2021-12-07 00:12:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:12:57,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 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 323 [2021-12-07 00:12:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:57,633 INFO L225 Difference]: With dead ends: 111913 [2021-12-07 00:12:57,633 INFO L226 Difference]: Without dead ends: 65120 [2021-12-07 00:12:57,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:12:57,660 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 342 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:57,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 98 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 00:12:57,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65120 states. [2021-12-07 00:12:58,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65120 to 61240. [2021-12-07 00:12:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61240 states, 61239 states have (on average 1.1242508858733813) internal successors, (68848), 61239 states have internal predecessors, (68848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61240 states to 61240 states and 68848 transitions. [2021-12-07 00:12:58,564 INFO L78 Accepts]: Start accepts. Automaton has 61240 states and 68848 transitions. Word has length 323 [2021-12-07 00:12:58,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:58,565 INFO L470 AbstractCegarLoop]: Abstraction has 61240 states and 68848 transitions. [2021-12-07 00:12:58,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 61240 states and 68848 transitions. [2021-12-07 00:12:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-12-07 00:12:58,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:58,602 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:58,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-07 00:12:58,602 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:58,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1906535752, now seen corresponding path program 1 times [2021-12-07 00:12:58,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:58,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825843082] [2021-12-07 00:12:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:58,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 100 proven. 6 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-07 00:12:58,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:58,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825843082] [2021-12-07 00:12:58,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825843082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:58,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213852437] [2021-12-07 00:12:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:58,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:58,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:58,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:58,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:12:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:58,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 00:12:58,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 00:12:59,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:12:59,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213852437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:59,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:12:59,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-07 00:12:59,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696509648] [2021-12-07 00:12:59,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:59,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:59,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:59,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:59,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:12:59,128 INFO L87 Difference]: Start difference. First operand 61240 states and 68848 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:59,944 INFO L93 Difference]: Finished difference Result 120442 states and 135511 transitions. [2021-12-07 00:12:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:59,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 336 [2021-12-07 00:12:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:59,995 INFO L225 Difference]: With dead ends: 120442 [2021-12-07 00:12:59,995 INFO L226 Difference]: Without dead ends: 60831 [2021-12-07 00:13:00,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:13:00,008 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 61 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:00,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 287 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:13:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60831 states. [2021-12-07 00:13:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60831 to 60828. [2021-12-07 00:13:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60828 states, 60827 states have (on average 1.1189110099133608) internal successors, (68060), 60827 states have internal predecessors, (68060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60828 states to 60828 states and 68060 transitions. [2021-12-07 00:13:00,618 INFO L78 Accepts]: Start accepts. Automaton has 60828 states and 68060 transitions. Word has length 336 [2021-12-07 00:13:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:00,619 INFO L470 AbstractCegarLoop]: Abstraction has 60828 states and 68060 transitions. [2021-12-07 00:13:00,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 60828 states and 68060 transitions. [2021-12-07 00:13:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-07 00:13:00,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:00,647 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:00,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:13:00,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:00,849 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:00,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:00,850 INFO L85 PathProgramCache]: Analyzing trace with hash 743449097, now seen corresponding path program 1 times [2021-12-07 00:13:00,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:00,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006975946] [2021-12-07 00:13:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:00,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 152 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-07 00:13:00,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:00,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006975946] [2021-12-07 00:13:00,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006975946] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:00,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562130957] [2021-12-07 00:13:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:00,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:00,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:00,981 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:00,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:13:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:01,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 00:13:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:13:01,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:13:01,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562130957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:01,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:13:01,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-07 00:13:01,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145443244] [2021-12-07 00:13:01,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:01,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:13:01,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:13:01,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:13:01,325 INFO L87 Difference]: Start difference. First operand 60828 states and 68060 transitions. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 2 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:01,931 INFO L93 Difference]: Finished difference Result 155623 states and 173425 transitions. [2021-12-07 00:13:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:13:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 2 states have internal predecessors, (328), 0 states have call successors, (0), 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 351 [2021-12-07 00:13:01,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:02,028 INFO L225 Difference]: With dead ends: 155623 [2021-12-07 00:13:02,028 INFO L226 Difference]: Without dead ends: 96424 [2021-12-07 00:13:02,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:13:02,055 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 210 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:02,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 523 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:13:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96424 states. [2021-12-07 00:13:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96424 to 92754. [2021-12-07 00:13:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92754 states, 92753 states have (on average 1.1103791791101096) internal successors, (102991), 92753 states have internal predecessors, (102991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92754 states to 92754 states and 102991 transitions. [2021-12-07 00:13:03,162 INFO L78 Accepts]: Start accepts. Automaton has 92754 states and 102991 transitions. Word has length 351 [2021-12-07 00:13:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:03,163 INFO L470 AbstractCegarLoop]: Abstraction has 92754 states and 102991 transitions. [2021-12-07 00:13:03,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 2 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 92754 states and 102991 transitions. [2021-12-07 00:13:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-07 00:13:03,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:03,185 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:03,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:13:03,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:03,387 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:03,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1096468041, now seen corresponding path program 1 times [2021-12-07 00:13:03,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:03,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299766275] [2021-12-07 00:13:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:03,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 125 proven. 6 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-07 00:13:03,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:03,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299766275] [2021-12-07 00:13:03,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299766275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:03,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817557818] [2021-12-07 00:13:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:03,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:03,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:03,502 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:03,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:13:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:03,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 00:13:03,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-07 00:13:03,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:13:03,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817557818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:03,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:13:03,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-07 00:13:03,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780065275] [2021-12-07 00:13:03,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:03,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:13:03,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:03,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:13:03,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:13:03,898 INFO L87 Difference]: Start difference. First operand 92754 states and 102991 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:04,585 INFO L93 Difference]: Finished difference Result 181246 states and 201464 transitions. [2021-12-07 00:13:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:13:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 355 [2021-12-07 00:13:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:04,673 INFO L225 Difference]: With dead ends: 181246 [2021-12-07 00:13:04,673 INFO L226 Difference]: Without dead ends: 92759 [2021-12-07 00:13:04,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:13:04,710 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 67 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:04,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 57 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:13:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92759 states. [2021-12-07 00:13:05,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92759 to 92754. [2021-12-07 00:13:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92754 states, 92753 states have (on average 1.1101851153062434) internal successors, (102973), 92753 states have internal predecessors, (102973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92754 states to 92754 states and 102973 transitions. [2021-12-07 00:13:05,746 INFO L78 Accepts]: Start accepts. Automaton has 92754 states and 102973 transitions. Word has length 355 [2021-12-07 00:13:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:05,746 INFO L470 AbstractCegarLoop]: Abstraction has 92754 states and 102973 transitions. [2021-12-07 00:13:05,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 92754 states and 102973 transitions. [2021-12-07 00:13:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-07 00:13:05,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:05,777 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:05,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-07 00:13:05,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 00:13:05,979 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:05,981 INFO L85 PathProgramCache]: Analyzing trace with hash 990037180, now seen corresponding path program 1 times [2021-12-07 00:13:05,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:05,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501633681] [2021-12-07 00:13:05,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:05,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-07 00:13:06,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:06,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501633681] [2021-12-07 00:13:06,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501633681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:06,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:13:06,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:13:06,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869655020] [2021-12-07 00:13:06,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:06,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:13:06,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:06,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:13:06,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:13:06,090 INFO L87 Difference]: Start difference. First operand 92754 states and 102973 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:07,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:07,204 INFO L93 Difference]: Finished difference Result 204017 states and 226250 transitions. [2021-12-07 00:13:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:13:07,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 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 386 [2021-12-07 00:13:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:07,334 INFO L225 Difference]: With dead ends: 204017 [2021-12-07 00:13:07,334 INFO L226 Difference]: Without dead ends: 112483 [2021-12-07 00:13:07,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:13:07,370 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 202 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:07,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 133 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:13:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112483 states. [2021-12-07 00:13:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112483 to 112475. [2021-12-07 00:13:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112475 states, 112474 states have (on average 1.1033572203353663) internal successors, (124099), 112474 states have internal predecessors, (124099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112475 states to 112475 states and 124099 transitions. [2021-12-07 00:13:08,737 INFO L78 Accepts]: Start accepts. Automaton has 112475 states and 124099 transitions. Word has length 386 [2021-12-07 00:13:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:08,737 INFO L470 AbstractCegarLoop]: Abstraction has 112475 states and 124099 transitions. [2021-12-07 00:13:08,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 112475 states and 124099 transitions. [2021-12-07 00:13:08,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-12-07 00:13:08,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:08,773 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:08,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-07 00:13:08,774 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:08,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2059486521, now seen corresponding path program 1 times [2021-12-07 00:13:08,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:08,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859492613] [2021-12-07 00:13:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:08,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 147 proven. 6 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-07 00:13:08,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:08,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859492613] [2021-12-07 00:13:08,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859492613] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:08,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353126391] [2021-12-07 00:13:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:08,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:08,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:08,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:13:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:09,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:13:09,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-07 00:13:09,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:13:09,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353126391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:09,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:13:09,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-07 00:13:09,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566453481] [2021-12-07 00:13:09,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:09,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:13:09,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:13:09,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:13:09,230 INFO L87 Difference]: Start difference. First operand 112475 states and 124099 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:10,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:10,190 INFO L93 Difference]: Finished difference Result 215983 states and 237922 transitions. [2021-12-07 00:13:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:13:10,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 398 [2021-12-07 00:13:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:10,297 INFO L225 Difference]: With dead ends: 215983 [2021-12-07 00:13:10,297 INFO L226 Difference]: Without dead ends: 103916 [2021-12-07 00:13:10,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:13:10,344 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 221 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:10,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 304 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:13:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103916 states. [2021-12-07 00:13:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103916 to 88686. [2021-12-07 00:13:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88686 states, 88685 states have (on average 1.0837458420251451) internal successors, (96112), 88685 states have internal predecessors, (96112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88686 states to 88686 states and 96112 transitions. [2021-12-07 00:13:11,436 INFO L78 Accepts]: Start accepts. Automaton has 88686 states and 96112 transitions. Word has length 398 [2021-12-07 00:13:11,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:11,437 INFO L470 AbstractCegarLoop]: Abstraction has 88686 states and 96112 transitions. [2021-12-07 00:13:11,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 88686 states and 96112 transitions. [2021-12-07 00:13:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-12-07 00:13:11,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:11,465 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:11,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:13:11,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-07 00:13:11,667 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:11,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:11,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1629732848, now seen corresponding path program 1 times [2021-12-07 00:13:11,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:11,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43796261] [2021-12-07 00:13:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:11,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 184 proven. 6 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2021-12-07 00:13:11,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:11,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43796261] [2021-12-07 00:13:11,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43796261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:11,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496332127] [2021-12-07 00:13:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:11,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:11,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:11,796 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:11,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:13:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:11,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:13:11,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 229 proven. 155 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-07 00:13:12,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:13:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 229 proven. 155 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-07 00:13:12,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496332127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:13:12,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:13:12,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-07 00:13:12,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808434615] [2021-12-07 00:13:12,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:13:12,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:13:12,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:12,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:13:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:13:12,630 INFO L87 Difference]: Start difference. First operand 88686 states and 96112 transitions. Second operand has 6 states, 6 states have (on average 63.0) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:15,277 INFO L93 Difference]: Finished difference Result 320737 states and 349067 transitions. [2021-12-07 00:13:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:13:15,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 63.0) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 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 432 [2021-12-07 00:13:15,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:15,552 INFO L225 Difference]: With dead ends: 320737 [2021-12-07 00:13:15,552 INFO L226 Difference]: Without dead ends: 236519 [2021-12-07 00:13:15,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 861 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:13:15,611 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 2627 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 3514 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2627 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 4075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 3514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:15,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2627 Valid, 221 Invalid, 4075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 3514 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-07 00:13:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236519 states. [2021-12-07 00:13:17,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236519 to 217180. [2021-12-07 00:13:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217180 states, 217179 states have (on average 1.0838893263160803) internal successors, (235398), 217179 states have internal predecessors, (235398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217180 states to 217180 states and 235398 transitions. [2021-12-07 00:13:18,351 INFO L78 Accepts]: Start accepts. Automaton has 217180 states and 235398 transitions. Word has length 432 [2021-12-07 00:13:18,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:18,351 INFO L470 AbstractCegarLoop]: Abstraction has 217180 states and 235398 transitions. [2021-12-07 00:13:18,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.0) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:18,352 INFO L276 IsEmpty]: Start isEmpty. Operand 217180 states and 235398 transitions. [2021-12-07 00:13:18,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-12-07 00:13:18,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:18,415 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:18,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:13:18,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 00:13:18,618 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:18,619 INFO L85 PathProgramCache]: Analyzing trace with hash 731407578, now seen corresponding path program 1 times [2021-12-07 00:13:18,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:18,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458242046] [2021-12-07 00:13:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:18,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 317 proven. 9 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-12-07 00:13:18,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:18,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458242046] [2021-12-07 00:13:18,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458242046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:18,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181506417] [2021-12-07 00:13:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:18,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:18,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:18,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:18,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:13:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:19,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 00:13:19,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-07 00:13:19,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:13:19,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181506417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:19,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:13:19,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-07 00:13:19,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361082132] [2021-12-07 00:13:19,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:19,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:13:19,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:13:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:13:19,413 INFO L87 Difference]: Start difference. First operand 217180 states and 235398 transitions. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:20,961 INFO L93 Difference]: Finished difference Result 406703 states and 440775 transitions. [2021-12-07 00:13:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:13:20,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 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 489 [2021-12-07 00:13:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:21,189 INFO L225 Difference]: With dead ends: 406703 [2021-12-07 00:13:21,189 INFO L226 Difference]: Without dead ends: 191961 [2021-12-07 00:13:21,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:13:21,292 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 202 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:21,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 104 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:13:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191961 states. [2021-12-07 00:13:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191961 to 174279. [2021-12-07 00:13:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174279 states, 174278 states have (on average 1.0649594326306246) internal successors, (185599), 174278 states have internal predecessors, (185599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174279 states to 174279 states and 185599 transitions. [2021-12-07 00:13:23,587 INFO L78 Accepts]: Start accepts. Automaton has 174279 states and 185599 transitions. Word has length 489 [2021-12-07 00:13:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:23,588 INFO L470 AbstractCegarLoop]: Abstraction has 174279 states and 185599 transitions. [2021-12-07 00:13:23,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 174279 states and 185599 transitions. [2021-12-07 00:13:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2021-12-07 00:13:23,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:23,642 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:23,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-07 00:13:23,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 00:13:23,844 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash 262279298, now seen corresponding path program 1 times [2021-12-07 00:13:23,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:23,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228691244] [2021-12-07 00:13:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:23,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 598 proven. 18 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-07 00:13:24,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:24,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228691244] [2021-12-07 00:13:24,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228691244] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:24,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909723357] [2021-12-07 00:13:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:24,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:24,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:24,033 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:24,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:13:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:24,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 00:13:24,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 495 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-12-07 00:13:24,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:13:24,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909723357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:24,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:13:24,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-07 00:13:24,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932300508] [2021-12-07 00:13:24,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:24,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:13:24,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:24,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:13:24,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:13:24,595 INFO L87 Difference]: Start difference. First operand 174279 states and 185599 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:25,939 INFO L93 Difference]: Finished difference Result 481531 states and 512837 transitions. [2021-12-07 00:13:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:13:25,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 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 538 [2021-12-07 00:13:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:26,414 INFO L225 Difference]: With dead ends: 481531 [2021-12-07 00:13:26,414 INFO L226 Difference]: Without dead ends: 310707 [2021-12-07 00:13:26,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:13:26,482 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 197 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:26,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 528 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:13:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310707 states. [2021-12-07 00:13:29,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310707 to 309848. [2021-12-07 00:13:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309848 states, 309847 states have (on average 1.0643091590365568) internal successors, (329773), 309847 states have internal predecessors, (329773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309848 states to 309848 states and 329773 transitions. [2021-12-07 00:13:30,294 INFO L78 Accepts]: Start accepts. Automaton has 309848 states and 329773 transitions. Word has length 538 [2021-12-07 00:13:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:30,294 INFO L470 AbstractCegarLoop]: Abstraction has 309848 states and 329773 transitions. [2021-12-07 00:13:30,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 309848 states and 329773 transitions. [2021-12-07 00:13:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2021-12-07 00:13:30,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:30,559 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:30,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-07 00:13:30,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 00:13:30,761 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:30,762 INFO L85 PathProgramCache]: Analyzing trace with hash -930308387, now seen corresponding path program 1 times [2021-12-07 00:13:30,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:30,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938776823] [2021-12-07 00:13:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:30,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 694 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-12-07 00:13:31,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:31,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938776823] [2021-12-07 00:13:31,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938776823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:31,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:13:31,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:13:31,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902377333] [2021-12-07 00:13:31,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:31,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:13:31,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:31,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:13:31,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:13:31,009 INFO L87 Difference]: Start difference. First operand 309848 states and 329773 transitions. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:33,446 INFO L93 Difference]: Finished difference Result 742702 states and 789888 transitions. [2021-12-07 00:13:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:13:33,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 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 587 [2021-12-07 00:13:33,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:34,118 INFO L225 Difference]: With dead ends: 742702 [2021-12-07 00:13:34,118 INFO L226 Difference]: Without dead ends: 434685 [2021-12-07 00:13:34,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:13:34,215 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 283 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:34,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 460 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:13:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434685 states. [2021-12-07 00:13:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434685 to 401567. [2021-12-07 00:13:38,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401567 states, 401566 states have (on average 1.065660439379828) internal successors, (427933), 401566 states have internal predecessors, (427933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:39,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401567 states to 401567 states and 427933 transitions. [2021-12-07 00:13:39,624 INFO L78 Accepts]: Start accepts. Automaton has 401567 states and 427933 transitions. Word has length 587 [2021-12-07 00:13:39,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:39,624 INFO L470 AbstractCegarLoop]: Abstraction has 401567 states and 427933 transitions. [2021-12-07 00:13:39,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand 401567 states and 427933 transitions. [2021-12-07 00:13:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2021-12-07 00:13:39,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:39,730 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:39,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-07 00:13:39,730 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:39,731 INFO L85 PathProgramCache]: Analyzing trace with hash -76687630, now seen corresponding path program 1 times [2021-12-07 00:13:39,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:39,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467290132] [2021-12-07 00:13:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:39,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 746 proven. 290 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:13:39,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:39,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467290132] [2021-12-07 00:13:39,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467290132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:39,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297479643] [2021-12-07 00:13:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:39,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:39,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:39,968 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:39,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:13:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:13:40,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 941 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-07 00:13:41,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:13:41,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297479643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:41,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:13:41,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-07 00:13:41,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599264245] [2021-12-07 00:13:41,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:41,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:13:41,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:41,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:13:41,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:13:41,368 INFO L87 Difference]: Start difference. First operand 401567 states and 427933 transitions. Second operand has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:44,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:44,804 INFO L93 Difference]: Finished difference Result 1021523 states and 1086283 transitions. [2021-12-07 00:13:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:13:44,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 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 627 [2021-12-07 00:13:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:45,571 INFO L225 Difference]: With dead ends: 1021523 [2021-12-07 00:13:45,571 INFO L226 Difference]: Without dead ends: 623819 [2021-12-07 00:13:45,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:13:45,715 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 333 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:45,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 346 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 00:13:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623819 states. [2021-12-07 00:13:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623819 to 600442. [2021-12-07 00:13:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600442 states, 600441 states have (on average 1.0628587987828946) internal successors, (638184), 600441 states have internal predecessors, (638184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600442 states to 600442 states and 638184 transitions. [2021-12-07 00:13:54,141 INFO L78 Accepts]: Start accepts. Automaton has 600442 states and 638184 transitions. Word has length 627 [2021-12-07 00:13:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:54,141 INFO L470 AbstractCegarLoop]: Abstraction has 600442 states and 638184 transitions. [2021-12-07 00:13:54,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:54,142 INFO L276 IsEmpty]: Start isEmpty. Operand 600442 states and 638184 transitions. [2021-12-07 00:13:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2021-12-07 00:13:54,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:54,347 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:54,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-07 00:13:54,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:54,551 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1054804692, now seen corresponding path program 1 times [2021-12-07 00:13:54,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:54,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277805779] [2021-12-07 00:13:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:54,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 1042 proven. 224 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-07 00:13:55,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:55,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277805779] [2021-12-07 00:13:55,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277805779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:55,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877102066] [2021-12-07 00:13:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:55,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:55,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:55,053 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:55,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:13:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:55,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:13:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 1171 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-12-07 00:13:55,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:13:55,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877102066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:55,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:13:55,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-12-07 00:13:55,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835610195] [2021-12-07 00:13:55,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:55,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:13:55,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:55,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:13:55,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:13:55,764 INFO L87 Difference]: Start difference. First operand 600442 states and 638184 transitions. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:01,091 INFO L93 Difference]: Finished difference Result 1646950 states and 1749158 transitions. [2021-12-07 00:14:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:14:01,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 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 688 [2021-12-07 00:14:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:02,680 INFO L225 Difference]: With dead ends: 1646950 [2021-12-07 00:14:02,681 INFO L226 Difference]: Without dead ends: 1050574 [2021-12-07 00:14:02,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:14:02,866 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 366 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:02,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 516 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 00:14:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050574 states. [2021-12-07 00:14:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050574 to 1045845. [2021-12-07 00:14:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045845 states, 1045844 states have (on average 1.0615818420338023) internal successors, (1110249), 1045844 states have internal predecessors, (1110249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045845 states to 1045845 states and 1110249 transitions. [2021-12-07 00:14:17,515 INFO L78 Accepts]: Start accepts. Automaton has 1045845 states and 1110249 transitions. Word has length 688 [2021-12-07 00:14:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:17,516 INFO L470 AbstractCegarLoop]: Abstraction has 1045845 states and 1110249 transitions. [2021-12-07 00:14:17,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1045845 states and 1110249 transitions. [2021-12-07 00:14:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2021-12-07 00:14:17,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:17,829 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:17,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-07 00:14:18,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a8e71a0-5ba7-4b19-9fcd-ff95c491e9aa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-07 00:14:18,031 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash -284470754, now seen corresponding path program 1 times [2021-12-07 00:14:18,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:18,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592295739] [2021-12-07 00:14:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:18,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1843 backedges. 522 proven. 0 refuted. 0 times theorem prover too weak. 1321 trivial. 0 not checked. [2021-12-07 00:14:18,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:18,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592295739] [2021-12-07 00:14:18,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592295739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:18,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:18,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:14:18,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488211377] [2021-12-07 00:14:18,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:18,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:14:18,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:18,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:14:18,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:18,234 INFO L87 Difference]: Start difference. First operand 1045845 states and 1110249 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 2 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:24,853 INFO L93 Difference]: Finished difference Result 2144003 states and 2274477 transitions. [2021-12-07 00:14:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:14:24,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 2 states have internal predecessors, (344), 0 states have call successors, (0), 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 737 [2021-12-07 00:14:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:26,310 INFO L225 Difference]: With dead ends: 2144003 [2021-12-07 00:14:26,310 INFO L226 Difference]: Without dead ends: 1100393 [2021-12-07 00:14:26,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:26,604 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 85 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:26,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 133 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:14:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100393 states.