./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8 --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 37cccb3bf38aef2358990f5bb72c991902624e4b903b7b6aaef89921bb90a94d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:07:48,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:07:48,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:07:48,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:07:48,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:07:48,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:07:48,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:07:48,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:07:48,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:07:48,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:07:48,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:07:48,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:07:48,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:07:48,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:07:48,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:07:48,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:07:48,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:07:48,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:07:48,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:07:48,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:07:48,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:07:48,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:07:48,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:07:48,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:07:48,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:07:48,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:07:48,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:07:48,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:07:48,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:07:48,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:07:48,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:07:48,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:07:48,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:07:48,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:07:48,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:07:48,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:07:48,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:07:48,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:07:48,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:07:48,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:07:48,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:07:48,806 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:07:48,827 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:07:48,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:07:48,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:07:48,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:07:48,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:07:48,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:07:48,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:07:48,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:07:48,830 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:07:48,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:07:48,830 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:07:48,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:07:48,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:07:48,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:07:48,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:07:48,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:07:48,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:07:48,831 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:07:48,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:07:48,832 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:07:48,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:07:48,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:07:48,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:07:48,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:07:48,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:07:48,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:07:48,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:07:48,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:07:48,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:07:48,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:07:48,834 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:07:48,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:07:48,834 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:07:48,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:07:48,835 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:07:48,835 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37cccb3bf38aef2358990f5bb72c991902624e4b903b7b6aaef89921bb90a94d [2022-12-13 15:07:49,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:07:49,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:07:49,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:07:49,044 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:07:49,044 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:07:49,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c [2022-12-13 15:07:51,721 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:07:51,973 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:07:51,973 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/sv-benchmarks/c/eca-rers2012/Problem03_label44.c [2022-12-13 15:07:51,983 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/data/724c3f692/366ec1ced6c141a49d74a349c0c21ee2/FLAG78e02fc2e [2022-12-13 15:07:51,993 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/data/724c3f692/366ec1ced6c141a49d74a349c0c21ee2 [2022-12-13 15:07:51,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:07:51,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:07:51,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:07:51,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:07:51,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:07:52,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:07:51" (1/1) ... [2022-12-13 15:07:52,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@731b47af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52, skipping insertion in model container [2022-12-13 15:07:52,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:07:51" (1/1) ... [2022-12-13 15:07:52,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:07:52,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:07:52,413 WARN L237 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_f443f8e2-8d6b-4817-8fe9-baf793073399/sv-benchmarks/c/eca-rers2012/Problem03_label44.c[58121,58134] [2022-12-13 15:07:52,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:07:52,453 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:07:52,602 WARN L237 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_f443f8e2-8d6b-4817-8fe9-baf793073399/sv-benchmarks/c/eca-rers2012/Problem03_label44.c[58121,58134] [2022-12-13 15:07:52,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:07:52,623 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:07:52,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52 WrapperNode [2022-12-13 15:07:52,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:07:52,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:07:52,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:07:52,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:07:52,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (1/1) ... [2022-12-13 15:07:52,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (1/1) ... [2022-12-13 15:07:52,715 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-13 15:07:52,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:07:52,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:07:52,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:07:52,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:07:52,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (1/1) ... [2022-12-13 15:07:52,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (1/1) ... [2022-12-13 15:07:52,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (1/1) ... [2022-12-13 15:07:52,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (1/1) ... [2022-12-13 15:07:52,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (1/1) ... [2022-12-13 15:07:52,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (1/1) ... [2022-12-13 15:07:52,768 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (1/1) ... [2022-12-13 15:07:52,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (1/1) ... [2022-12-13 15:07:52,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:07:52,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:07:52,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:07:52,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:07:52,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (1/1) ... [2022-12-13 15:07:52,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:07:52,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:07:52,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:07:52,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:07:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:07:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:07:52,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:07:52,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:07:52,911 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:07:52,913 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:07:54,197 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:07:54,204 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:07:54,204 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 15:07:54,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:07:54 BoogieIcfgContainer [2022-12-13 15:07:54,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:07:54,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:07:54,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:07:54,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:07:54,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:07:51" (1/3) ... [2022-12-13 15:07:54,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf35548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:07:54, skipping insertion in model container [2022-12-13 15:07:54,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:07:52" (2/3) ... [2022-12-13 15:07:54,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf35548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:07:54, skipping insertion in model container [2022-12-13 15:07:54,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:07:54" (3/3) ... [2022-12-13 15:07:54,212 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label44.c [2022-12-13 15:07:54,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:07:54,227 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:07:54,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:07:54,270 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12841468, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:07:54,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 15:07:54,275 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) [2022-12-13 15:07:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-13 15:07:54,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:07:54,285 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:07:54,285 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:07:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 302925243, now seen corresponding path program 1 times [2022-12-13 15:07:54,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:54,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288402701] [2022-12-13 15:07:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:54,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:54,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:54,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288402701] [2022-12-13 15:07:54,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288402701] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:54,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:54,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:07:54,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868516682] [2022-12-13 15:07:54,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:54,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:54,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:54,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:54,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:54,910 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 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:07:55,781 INFO L93 Difference]: Finished difference Result 855 states and 1496 transitions. [2022-12-13 15:07:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:55,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2022-12-13 15:07:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:07:55,793 INFO L225 Difference]: With dead ends: 855 [2022-12-13 15:07:55,793 INFO L226 Difference]: Without dead ends: 460 [2022-12-13 15:07:55,796 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:07:55,799 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 119 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:07:55,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 15:07:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-12-13 15:07:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 459. [2022-12-13 15:07:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.5502183406113537) internal successors, (710), 458 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 710 transitions. [2022-12-13 15:07:55,856 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 710 transitions. Word has length 177 [2022-12-13 15:07:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:07:55,857 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 710 transitions. [2022-12-13 15:07:55,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 710 transitions. [2022-12-13 15:07:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-13 15:07:55,862 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:07:55,863 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 15:07:55,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:07:55,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:07:55,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:55,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2005485845, now seen corresponding path program 1 times [2022-12-13 15:07:55,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:55,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246609438] [2022-12-13 15:07:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:55,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:56,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:56,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246609438] [2022-12-13 15:07:56,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246609438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:56,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:56,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:07:56,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677661998] [2022-12-13 15:07:56,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:56,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:56,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:56,184 INFO L87 Difference]: Start difference. First operand 459 states and 710 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:07:56,736 INFO L93 Difference]: Finished difference Result 1342 states and 2082 transitions. [2022-12-13 15:07:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:56,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-12-13 15:07:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:07:56,739 INFO L225 Difference]: With dead ends: 1342 [2022-12-13 15:07:56,739 INFO L226 Difference]: Without dead ends: 885 [2022-12-13 15:07:56,740 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:07:56,741 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:07:56,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 181 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:07:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-12-13 15:07:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 880. [2022-12-13 15:07:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.4687144482366326) internal successors, (1291), 879 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1291 transitions. [2022-12-13 15:07:56,777 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1291 transitions. Word has length 182 [2022-12-13 15:07:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:07:56,778 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1291 transitions. [2022-12-13 15:07:56,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1291 transitions. [2022-12-13 15:07:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-13 15:07:56,783 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:07:56,783 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:07:56,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:07:56,783 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:07:56,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:56,784 INFO L85 PathProgramCache]: Analyzing trace with hash -23446020, now seen corresponding path program 1 times [2022-12-13 15:07:56,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:56,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021625276] [2022-12-13 15:07:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:56,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:56,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:56,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021625276] [2022-12-13 15:07:56,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021625276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:56,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:56,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:07:56,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303978726] [2022-12-13 15:07:56,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:56,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:07:56,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:07:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:07:56,934 INFO L87 Difference]: Start difference. First operand 880 states and 1291 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:07:57,596 INFO L93 Difference]: Finished difference Result 2594 states and 3822 transitions. [2022-12-13 15:07:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:07:57,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2022-12-13 15:07:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:07:57,599 INFO L225 Difference]: With dead ends: 2594 [2022-12-13 15:07:57,599 INFO L226 Difference]: Without dead ends: 1716 [2022-12-13 15:07:57,600 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:07:57,601 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:07:57,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 15:07:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-12-13 15:07:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1696. [2022-12-13 15:07:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 1.4395280235988202) internal successors, (2440), 1695 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2440 transitions. [2022-12-13 15:07:57,630 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2440 transitions. Word has length 185 [2022-12-13 15:07:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:07:57,630 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2440 transitions. [2022-12-13 15:07:57,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2440 transitions. [2022-12-13 15:07:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-12-13 15:07:57,633 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:07:57,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-12-13 15:07:57,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:07:57,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:07:57,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:57,634 INFO L85 PathProgramCache]: Analyzing trace with hash 372513201, now seen corresponding path program 1 times [2022-12-13 15:07:57,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:57,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248979730] [2022-12-13 15:07:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:57,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:07:58,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:58,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248979730] [2022-12-13 15:07:58,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248979730] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:58,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:58,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:07:58,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144784134] [2022-12-13 15:07:58,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:58,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:07:58,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:07:58,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:07:58,013 INFO L87 Difference]: Start difference. First operand 1696 states and 2440 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:07:58,827 INFO L93 Difference]: Finished difference Result 3531 states and 5130 transitions. [2022-12-13 15:07:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:07:58,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-12-13 15:07:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:07:58,831 INFO L225 Difference]: With dead ends: 3531 [2022-12-13 15:07:58,831 INFO L226 Difference]: Without dead ends: 1663 [2022-12-13 15:07:58,832 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:07:58,833 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 299 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:07:58,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 47 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 15:07:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-12-13 15:07:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1663. [2022-12-13 15:07:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 1.325511432009627) internal successors, (2203), 1662 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2203 transitions. [2022-12-13 15:07:58,860 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2203 transitions. Word has length 192 [2022-12-13 15:07:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:07:58,861 INFO L495 AbstractCegarLoop]: Abstraction has 1663 states and 2203 transitions. [2022-12-13 15:07:58,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2203 transitions. [2022-12-13 15:07:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-12-13 15:07:58,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:07:58,865 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:07:58,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:07:58,865 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:07:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash 146400972, now seen corresponding path program 1 times [2022-12-13 15:07:58,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:58,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039386606] [2022-12-13 15:07:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:58,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:59,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:59,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039386606] [2022-12-13 15:07:59,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039386606] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:07:59,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:07:59,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:07:59,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283382920] [2022-12-13 15:07:59,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:07:59,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:07:59,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:59,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:07:59,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:07:59,220 INFO L87 Difference]: Start difference. First operand 1663 states and 2203 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:00,056 INFO L93 Difference]: Finished difference Result 4323 states and 5743 transitions. [2022-12-13 15:08:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:08:00,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2022-12-13 15:08:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:00,061 INFO L225 Difference]: With dead ends: 4323 [2022-12-13 15:08:00,061 INFO L226 Difference]: Without dead ends: 2488 [2022-12-13 15:08:00,062 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:08:00,063 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 194 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:00,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 94 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 15:08:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2022-12-13 15:08:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2487. [2022-12-13 15:08:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 1.3085277554304102) internal successors, (3253), 2486 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3253 transitions. [2022-12-13 15:08:00,092 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3253 transitions. Word has length 208 [2022-12-13 15:08:00,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:00,092 INFO L495 AbstractCegarLoop]: Abstraction has 2487 states and 3253 transitions. [2022-12-13 15:08:00,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3253 transitions. [2022-12-13 15:08:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-12-13 15:08:00,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:00,096 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:00,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:08:00,096 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:00,096 INFO L85 PathProgramCache]: Analyzing trace with hash -459963951, now seen corresponding path program 1 times [2022-12-13 15:08:00,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:00,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80345436] [2022-12-13 15:08:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:00,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:08:00,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:00,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80345436] [2022-12-13 15:08:00,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80345436] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:00,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:00,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:08:00,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786828593] [2022-12-13 15:08:00,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:00,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:00,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:00,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:00,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:08:00,337 INFO L87 Difference]: Start difference. First operand 2487 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:00,922 INFO L93 Difference]: Finished difference Result 7433 states and 9727 transitions. [2022-12-13 15:08:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:00,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2022-12-13 15:08:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:00,933 INFO L225 Difference]: With dead ends: 7433 [2022-12-13 15:08:00,933 INFO L226 Difference]: Without dead ends: 4948 [2022-12-13 15:08:00,936 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:08:00,936 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 206 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:00,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 62 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:08:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2022-12-13 15:08:00,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 4937. [2022-12-13 15:08:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 1.2884927066450567) internal successors, (6360), 4936 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 6360 transitions. [2022-12-13 15:08:00,999 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 6360 transitions. Word has length 210 [2022-12-13 15:08:00,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:00,999 INFO L495 AbstractCegarLoop]: Abstraction has 4937 states and 6360 transitions. [2022-12-13 15:08:01,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:01,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 6360 transitions. [2022-12-13 15:08:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-12-13 15:08:01,005 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:01,005 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:08:01,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:08:01,006 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:01,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:01,006 INFO L85 PathProgramCache]: Analyzing trace with hash -145510537, now seen corresponding path program 1 times [2022-12-13 15:08:01,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:01,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993676193] [2022-12-13 15:08:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:01,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:01,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:01,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993676193] [2022-12-13 15:08:01,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993676193] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:01,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238048253] [2022-12-13 15:08:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:01,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:01,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:01,277 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:01,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:08:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:01,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 15:08:01,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 15:08:01,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:01,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238048253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:01,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:08:01,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 15:08:01,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44830495] [2022-12-13 15:08:01,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:01,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:01,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:01,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:01,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:01,623 INFO L87 Difference]: Start difference. First operand 4937 states and 6360 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:02,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:02,186 INFO L93 Difference]: Finished difference Result 9884 states and 12740 transitions. [2022-12-13 15:08:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 215 [2022-12-13 15:08:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:02,194 INFO L225 Difference]: With dead ends: 9884 [2022-12-13 15:08:02,195 INFO L226 Difference]: Without dead ends: 4949 [2022-12-13 15:08:02,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:02,199 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 47 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:02,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 307 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:08:02,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2022-12-13 15:08:02,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 4937. [2022-12-13 15:08:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 1.2710696920583469) internal successors, (6274), 4936 states have internal predecessors, (6274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 6274 transitions. [2022-12-13 15:08:02,267 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 6274 transitions. Word has length 215 [2022-12-13 15:08:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:02,268 INFO L495 AbstractCegarLoop]: Abstraction has 4937 states and 6274 transitions. [2022-12-13 15:08:02,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:02,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 6274 transitions. [2022-12-13 15:08:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-12-13 15:08:02,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:02,273 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:02,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-13 15:08:02,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 15:08:02,474 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:02,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:02,474 INFO L85 PathProgramCache]: Analyzing trace with hash -71775401, now seen corresponding path program 1 times [2022-12-13 15:08:02,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:02,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730023563] [2022-12-13 15:08:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:02,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 64 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 15:08:02,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:02,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730023563] [2022-12-13 15:08:02,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730023563] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:02,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407098114] [2022-12-13 15:08:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:02,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:02,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:02,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:02,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:08:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:02,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 15:08:02,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 15:08:02,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:02,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407098114] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:02,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:08:02,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 15:08:02,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768358979] [2022-12-13 15:08:02,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:02,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:02,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:02,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:02,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:02,932 INFO L87 Difference]: Start difference. First operand 4937 states and 6274 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:03,108 INFO L93 Difference]: Finished difference Result 14805 states and 18816 transitions. [2022-12-13 15:08:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:03,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2022-12-13 15:08:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:03,123 INFO L225 Difference]: With dead ends: 14805 [2022-12-13 15:08:03,124 INFO L226 Difference]: Without dead ends: 9870 [2022-12-13 15:08:03,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:03,127 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 268 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:03,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 507 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:08:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2022-12-13 15:08:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 9868. [2022-12-13 15:08:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9868 states, 9867 states have (on average 1.2677612242829635) internal successors, (12509), 9867 states have internal predecessors, (12509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9868 states to 9868 states and 12509 transitions. [2022-12-13 15:08:03,254 INFO L78 Accepts]: Start accepts. Automaton has 9868 states and 12509 transitions. Word has length 232 [2022-12-13 15:08:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:03,254 INFO L495 AbstractCegarLoop]: Abstraction has 9868 states and 12509 transitions. [2022-12-13 15:08:03,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 9868 states and 12509 transitions. [2022-12-13 15:08:03,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-12-13 15:08:03,264 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:03,264 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-13 15:08:03,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 15:08:03,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:03,466 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:03,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:03,468 INFO L85 PathProgramCache]: Analyzing trace with hash -381195820, now seen corresponding path program 1 times [2022-12-13 15:08:03,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:03,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316277861] [2022-12-13 15:08:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:03,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-13 15:08:03,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:03,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316277861] [2022-12-13 15:08:03,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316277861] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:03,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840735377] [2022-12-13 15:08:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:03,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:03,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:03,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:03,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:08:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 15:08:03,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 15:08:04,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:04,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840735377] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:04,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:08:04,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 15:08:04,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398517890] [2022-12-13 15:08:04,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:04,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:04,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:04,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:04,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:04,009 INFO L87 Difference]: Start difference. First operand 9868 states and 12509 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:04,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:04,609 INFO L93 Difference]: Finished difference Result 28065 states and 35647 transitions. [2022-12-13 15:08:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:04,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 236 [2022-12-13 15:08:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:04,642 INFO L225 Difference]: With dead ends: 28065 [2022-12-13 15:08:04,642 INFO L226 Difference]: Without dead ends: 18199 [2022-12-13 15:08:04,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:04,646 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 42 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:04,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 342 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:08:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18199 states. [2022-12-13 15:08:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18199 to 18191. [2022-12-13 15:08:04,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18191 states, 18190 states have (on average 1.1650907091808687) internal successors, (21193), 18190 states have internal predecessors, (21193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18191 states to 18191 states and 21193 transitions. [2022-12-13 15:08:04,834 INFO L78 Accepts]: Start accepts. Automaton has 18191 states and 21193 transitions. Word has length 236 [2022-12-13 15:08:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:04,834 INFO L495 AbstractCegarLoop]: Abstraction has 18191 states and 21193 transitions. [2022-12-13 15:08:04,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 18191 states and 21193 transitions. [2022-12-13 15:08:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-12-13 15:08:04,851 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:04,851 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:04,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:08:05,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:05,053 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:05,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:05,055 INFO L85 PathProgramCache]: Analyzing trace with hash 414829696, now seen corresponding path program 1 times [2022-12-13 15:08:05,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:05,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491084223] [2022-12-13 15:08:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:05,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:05,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491084223] [2022-12-13 15:08:05,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491084223] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:05,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:05,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:08:05,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119749984] [2022-12-13 15:08:05,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:05,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:05,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:05,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:05,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:08:05,244 INFO L87 Difference]: Start difference. First operand 18191 states and 21193 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 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) [2022-12-13 15:08:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:05,789 INFO L93 Difference]: Finished difference Result 42876 states and 50739 transitions. [2022-12-13 15:08:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:05,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 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 236 [2022-12-13 15:08:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:05,820 INFO L225 Difference]: With dead ends: 42876 [2022-12-13 15:08:05,820 INFO L226 Difference]: Without dead ends: 24687 [2022-12-13 15:08:05,829 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:08:05,829 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 158 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:05,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 126 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:08:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24687 states. [2022-12-13 15:08:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24687 to 24687. [2022-12-13 15:08:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24687 states, 24686 states have (on average 1.1374868346431175) internal successors, (28080), 24686 states have internal predecessors, (28080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24687 states to 24687 states and 28080 transitions. [2022-12-13 15:08:06,112 INFO L78 Accepts]: Start accepts. Automaton has 24687 states and 28080 transitions. Word has length 236 [2022-12-13 15:08:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:06,112 INFO L495 AbstractCegarLoop]: Abstraction has 24687 states and 28080 transitions. [2022-12-13 15:08:06,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 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) [2022-12-13 15:08:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 24687 states and 28080 transitions. [2022-12-13 15:08:06,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-12-13 15:08:06,124 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:06,124 INFO L195 NwaCegarLoop]: 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, 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] [2022-12-13 15:08:06,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:08:06,125 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:06,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1383255126, now seen corresponding path program 1 times [2022-12-13 15:08:06,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:06,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750467488] [2022-12-13 15:08:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:06,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:06,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:06,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750467488] [2022-12-13 15:08:06,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750467488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:06,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:06,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:08:06,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76464925] [2022-12-13 15:08:06,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:06,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:06,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:06,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:06,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:08:06,304 INFO L87 Difference]: Start difference. First operand 24687 states and 28080 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 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) [2022-12-13 15:08:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:06,927 INFO L93 Difference]: Finished difference Result 61609 states and 70213 transitions. [2022-12-13 15:08:06,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:06,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 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 252 [2022-12-13 15:08:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:06,962 INFO L225 Difference]: With dead ends: 61609 [2022-12-13 15:08:06,962 INFO L226 Difference]: Without dead ends: 37330 [2022-12-13 15:08:07,002 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:08:07,003 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 157 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:07,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 105 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:08:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37330 states. [2022-12-13 15:08:07,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37330 to 34657. [2022-12-13 15:08:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34657 states, 34656 states have (on average 1.143409510618652) internal successors, (39626), 34656 states have internal predecessors, (39626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:07,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34657 states to 34657 states and 39626 transitions. [2022-12-13 15:08:07,412 INFO L78 Accepts]: Start accepts. Automaton has 34657 states and 39626 transitions. Word has length 252 [2022-12-13 15:08:07,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:07,412 INFO L495 AbstractCegarLoop]: Abstraction has 34657 states and 39626 transitions. [2022-12-13 15:08:07,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 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) [2022-12-13 15:08:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 34657 states and 39626 transitions. [2022-12-13 15:08:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-12-13 15:08:07,433 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:07,433 INFO L195 NwaCegarLoop]: 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, 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] [2022-12-13 15:08:07,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 15:08:07,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:07,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1143032390, now seen corresponding path program 1 times [2022-12-13 15:08:07,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:07,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454545073] [2022-12-13 15:08:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:07,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:07,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:07,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454545073] [2022-12-13 15:08:07,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454545073] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:07,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:07,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:08:07,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876531217] [2022-12-13 15:08:07,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:07,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:07,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:07,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:07,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:08:07,617 INFO L87 Difference]: Start difference. First operand 34657 states and 39626 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:08,335 INFO L93 Difference]: Finished difference Result 81922 states and 93790 transitions. [2022-12-13 15:08:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 [2022-12-13 15:08:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:08,373 INFO L225 Difference]: With dead ends: 81922 [2022-12-13 15:08:08,373 INFO L226 Difference]: Without dead ends: 48079 [2022-12-13 15:08:08,390 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:08:08,390 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 58 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:08,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 302 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:08:08,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48079 states. [2022-12-13 15:08:08,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48079 to 48067. [2022-12-13 15:08:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48067 states, 48066 states have (on average 1.1245995090084466) internal successors, (54055), 48066 states have internal predecessors, (54055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48067 states to 48067 states and 54055 transitions. [2022-12-13 15:08:08,953 INFO L78 Accepts]: Start accepts. Automaton has 48067 states and 54055 transitions. Word has length 273 [2022-12-13 15:08:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:08,954 INFO L495 AbstractCegarLoop]: Abstraction has 48067 states and 54055 transitions. [2022-12-13 15:08:08,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 48067 states and 54055 transitions. [2022-12-13 15:08:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-12-13 15:08:08,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:08,985 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:08,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:08:08,985 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:08,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2060000917, now seen corresponding path program 1 times [2022-12-13 15:08:08,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:08,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885575500] [2022-12-13 15:08:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:08,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-13 15:08:09,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:09,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885575500] [2022-12-13 15:08:09,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885575500] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:09,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794474071] [2022-12-13 15:08:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:09,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:09,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:09,307 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:09,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:08:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:09,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 15:08:09,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-13 15:08:09,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:09,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794474071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:09,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:08:09,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 15:08:09,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390799092] [2022-12-13 15:08:09,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:09,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:09,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:09,624 INFO L87 Difference]: Start difference. First operand 48067 states and 54055 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:10,175 INFO L93 Difference]: Finished difference Result 95125 states and 107055 transitions. [2022-12-13 15:08:10,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:10,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 288 [2022-12-13 15:08:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:10,215 INFO L225 Difference]: With dead ends: 95125 [2022-12-13 15:08:10,216 INFO L226 Difference]: Without dead ends: 47872 [2022-12-13 15:08:10,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:10,236 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 86 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:10,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 277 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:08:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47872 states. [2022-12-13 15:08:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47872 to 47458. [2022-12-13 15:08:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47458 states, 47457 states have (on average 1.1174958383378637) internal successors, (53033), 47457 states have internal predecessors, (53033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47458 states to 47458 states and 53033 transitions. [2022-12-13 15:08:10,649 INFO L78 Accepts]: Start accepts. Automaton has 47458 states and 53033 transitions. Word has length 288 [2022-12-13 15:08:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:10,649 INFO L495 AbstractCegarLoop]: Abstraction has 47458 states and 53033 transitions. [2022-12-13 15:08:10,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 47458 states and 53033 transitions. [2022-12-13 15:08:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-12-13 15:08:10,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:10,674 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 15:08:10,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 15:08:10,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 15:08:10,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:10,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:10,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1333397972, now seen corresponding path program 1 times [2022-12-13 15:08:10,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:10,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795930311] [2022-12-13 15:08:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:10,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 15:08:11,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:11,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795930311] [2022-12-13 15:08:11,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795930311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:11,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:11,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:08:11,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135992772] [2022-12-13 15:08:11,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:11,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:11,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:11,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:11,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:08:11,126 INFO L87 Difference]: Start difference. First operand 47458 states and 53033 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:11,978 INFO L93 Difference]: Finished difference Result 87966 states and 98185 transitions. [2022-12-13 15:08:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:11,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 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 326 [2022-12-13 15:08:11,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:12,016 INFO L225 Difference]: With dead ends: 87966 [2022-12-13 15:08:12,016 INFO L226 Difference]: Without dead ends: 41322 [2022-12-13 15:08:12,040 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:08:12,040 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 224 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:12,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 303 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 15:08:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41322 states. [2022-12-13 15:08:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41322 to 39696. [2022-12-13 15:08:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39696 states, 39695 states have (on average 1.092631313767477) internal successors, (43372), 39695 states have internal predecessors, (43372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39696 states to 39696 states and 43372 transitions. [2022-12-13 15:08:12,652 INFO L78 Accepts]: Start accepts. Automaton has 39696 states and 43372 transitions. Word has length 326 [2022-12-13 15:08:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:12,652 INFO L495 AbstractCegarLoop]: Abstraction has 39696 states and 43372 transitions. [2022-12-13 15:08:12,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 39696 states and 43372 transitions. [2022-12-13 15:08:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-12-13 15:08:12,675 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:12,675 INFO L195 NwaCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:12,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 15:08:12,675 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash 302232853, now seen corresponding path program 1 times [2022-12-13 15:08:12,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:12,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602809638] [2022-12-13 15:08:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:12,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 154 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:13,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:13,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602809638] [2022-12-13 15:08:13,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602809638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:13,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176946605] [2022-12-13 15:08:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:13,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:13,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:13,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:13,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:08:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:13,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:08:13,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:14,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:14,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176946605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:14,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:08:14,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-12-13 15:08:14,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494324784] [2022-12-13 15:08:14,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:14,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:08:14,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:14,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:08:14,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:08:14,103 INFO L87 Difference]: Start difference. First operand 39696 states and 43372 transitions. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:14,977 INFO L93 Difference]: Finished difference Result 91403 states and 100131 transitions. [2022-12-13 15:08:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:08:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 332 [2022-12-13 15:08:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:15,021 INFO L225 Difference]: With dead ends: 91403 [2022-12-13 15:08:15,021 INFO L226 Difference]: Without dead ends: 52724 [2022-12-13 15:08:15,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:08:15,041 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 409 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:15,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 108 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 15:08:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52724 states. [2022-12-13 15:08:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52724 to 52079. [2022-12-13 15:08:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52079 states, 52078 states have (on average 1.0798993816966858) internal successors, (56239), 52078 states have internal predecessors, (56239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52079 states to 52079 states and 56239 transitions. [2022-12-13 15:08:15,549 INFO L78 Accepts]: Start accepts. Automaton has 52079 states and 56239 transitions. Word has length 332 [2022-12-13 15:08:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:15,549 INFO L495 AbstractCegarLoop]: Abstraction has 52079 states and 56239 transitions. [2022-12-13 15:08:15,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 52079 states and 56239 transitions. [2022-12-13 15:08:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-12-13 15:08:15,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:15,603 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:15,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 15:08:15,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 15:08:15,805 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:15,806 INFO L85 PathProgramCache]: Analyzing trace with hash -32862139, now seen corresponding path program 1 times [2022-12-13 15:08:15,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:15,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662129773] [2022-12-13 15:08:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:15,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-12-13 15:08:16,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:16,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662129773] [2022-12-13 15:08:16,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662129773] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:16,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613061686] [2022-12-13 15:08:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:16,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:16,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:16,136 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:16,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:08:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:16,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:08:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:08:16,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:16,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613061686] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:16,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:08:16,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 15:08:16,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388564066] [2022-12-13 15:08:16,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:16,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:16,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:16,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:16,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:16,408 INFO L87 Difference]: Start difference. First operand 52079 states and 56239 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:17,224 INFO L93 Difference]: Finished difference Result 99484 states and 107571 transitions. [2022-12-13 15:08:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:17,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 345 [2022-12-13 15:08:17,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:17,268 INFO L225 Difference]: With dead ends: 99484 [2022-12-13 15:08:17,268 INFO L226 Difference]: Without dead ends: 48422 [2022-12-13 15:08:17,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:17,289 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 109 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:17,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 293 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:08:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48422 states. [2022-12-13 15:08:17,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48422 to 45166. [2022-12-13 15:08:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45166 states, 45165 states have (on average 1.066423115244105) internal successors, (48165), 45165 states have internal predecessors, (48165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45166 states to 45166 states and 48165 transitions. [2022-12-13 15:08:17,970 INFO L78 Accepts]: Start accepts. Automaton has 45166 states and 48165 transitions. Word has length 345 [2022-12-13 15:08:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:17,970 INFO L495 AbstractCegarLoop]: Abstraction has 45166 states and 48165 transitions. [2022-12-13 15:08:17,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 45166 states and 48165 transitions. [2022-12-13 15:08:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-12-13 15:08:18,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:18,004 INFO L195 NwaCegarLoop]: 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, 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, 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] [2022-12-13 15:08:18,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 15:08:18,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 15:08:18,205 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash -985881480, now seen corresponding path program 1 times [2022-12-13 15:08:18,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:18,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965754163] [2022-12-13 15:08:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:18,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-13 15:08:18,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:18,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965754163] [2022-12-13 15:08:18,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965754163] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:18,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:18,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:08:18,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030249537] [2022-12-13 15:08:18,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:18,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:18,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:18,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:18,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:08:18,914 INFO L87 Difference]: Start difference. First operand 45166 states and 48165 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 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) [2022-12-13 15:08:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:19,675 INFO L93 Difference]: Finished difference Result 89520 states and 95488 transitions. [2022-12-13 15:08:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:19,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 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 359 [2022-12-13 15:08:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:19,714 INFO L225 Difference]: With dead ends: 89520 [2022-12-13 15:08:19,714 INFO L226 Difference]: Without dead ends: 45371 [2022-12-13 15:08:19,733 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:08:19,734 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:19,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 127 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 15:08:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45371 states. [2022-12-13 15:08:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45371 to 45369. [2022-12-13 15:08:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45369 states, 45368 states have (on average 1.0662801974960325) internal successors, (48375), 45368 states have internal predecessors, (48375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45369 states to 45369 states and 48375 transitions. [2022-12-13 15:08:20,188 INFO L78 Accepts]: Start accepts. Automaton has 45369 states and 48375 transitions. Word has length 359 [2022-12-13 15:08:20,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:20,188 INFO L495 AbstractCegarLoop]: Abstraction has 45369 states and 48375 transitions. [2022-12-13 15:08:20,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 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) [2022-12-13 15:08:20,189 INFO L276 IsEmpty]: Start isEmpty. Operand 45369 states and 48375 transitions. [2022-12-13 15:08:20,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2022-12-13 15:08:20,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:20,215 INFO L195 NwaCegarLoop]: 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, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:20,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 15:08:20,215 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1903494745, now seen corresponding path program 1 times [2022-12-13 15:08:20,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:20,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702422134] [2022-12-13 15:08:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 15:08:20,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:20,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702422134] [2022-12-13 15:08:20,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702422134] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:20,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215619647] [2022-12-13 15:08:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:20,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:20,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:20,529 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:20,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:08:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:08:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 15:08:20,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:20,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215619647] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:20,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:08:20,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 15:08:20,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367944193] [2022-12-13 15:08:20,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:20,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:08:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:08:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:08:20,793 INFO L87 Difference]: Start difference. First operand 45369 states and 48375 transitions. Second operand has 4 states, 4 states have (on average 54.25) 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) [2022-12-13 15:08:21,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:21,839 INFO L93 Difference]: Finished difference Result 125121 states and 133467 transitions. [2022-12-13 15:08:21,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:08:21,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) 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 364 [2022-12-13 15:08:21,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:21,914 INFO L225 Difference]: With dead ends: 125121 [2022-12-13 15:08:21,914 INFO L226 Difference]: Without dead ends: 80972 [2022-12-13 15:08:21,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:08:21,947 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 519 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:21,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 432 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 15:08:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80972 states. [2022-12-13 15:08:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80972 to 79732. [2022-12-13 15:08:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79732 states, 79731 states have (on average 1.065984372452371) internal successors, (84992), 79731 states have internal predecessors, (84992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79732 states to 79732 states and 84992 transitions. [2022-12-13 15:08:22,869 INFO L78 Accepts]: Start accepts. Automaton has 79732 states and 84992 transitions. Word has length 364 [2022-12-13 15:08:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:22,869 INFO L495 AbstractCegarLoop]: Abstraction has 79732 states and 84992 transitions. [2022-12-13 15:08:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) 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) [2022-12-13 15:08:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 79732 states and 84992 transitions. [2022-12-13 15:08:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-12-13 15:08:22,893 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:22,893 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2022-12-13 15:08:22,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:08:23,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 15:08:23,097 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:23,098 INFO L85 PathProgramCache]: Analyzing trace with hash -698379154, now seen corresponding path program 1 times [2022-12-13 15:08:23,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:23,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204018910] [2022-12-13 15:08:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:23,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 192 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-13 15:08:23,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:23,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204018910] [2022-12-13 15:08:23,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204018910] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:23,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870326664] [2022-12-13 15:08:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:23,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:23,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:23,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:23,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:08:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 15:08:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-13 15:08:23,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:23,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870326664] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:23,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:08:23,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 15:08:23,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835081329] [2022-12-13 15:08:23,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:23,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:23,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:23,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:23,638 INFO L87 Difference]: Start difference. First operand 79732 states and 84992 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:24,435 INFO L93 Difference]: Finished difference Result 233906 states and 249387 transitions. [2022-12-13 15:08:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 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 366 [2022-12-13 15:08:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:24,571 INFO L225 Difference]: With dead ends: 233906 [2022-12-13 15:08:24,571 INFO L226 Difference]: Without dead ends: 155394 [2022-12-13 15:08:24,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:24,596 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 185 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:24,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 485 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:08:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155394 states. [2022-12-13 15:08:26,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155394 to 155390. [2022-12-13 15:08:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155390 states, 155389 states have (on average 1.0656738894001505) internal successors, (165594), 155389 states have internal predecessors, (165594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155390 states to 155390 states and 165594 transitions. [2022-12-13 15:08:26,441 INFO L78 Accepts]: Start accepts. Automaton has 155390 states and 165594 transitions. Word has length 366 [2022-12-13 15:08:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:26,441 INFO L495 AbstractCegarLoop]: Abstraction has 155390 states and 165594 transitions. [2022-12-13 15:08:26,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 155390 states and 165594 transitions. [2022-12-13 15:08:26,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-12-13 15:08:26,476 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:26,476 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2022-12-13 15:08:26,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 15:08:26,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:26,679 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:26,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:26,681 INFO L85 PathProgramCache]: Analyzing trace with hash 598075760, now seen corresponding path program 1 times [2022-12-13 15:08:26,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:26,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810066581] [2022-12-13 15:08:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:26,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:08:27,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:27,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810066581] [2022-12-13 15:08:27,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810066581] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:27,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:27,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:08:27,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856963648] [2022-12-13 15:08:27,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:27,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:27,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:27,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:27,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:08:27,160 INFO L87 Difference]: Start difference. First operand 155390 states and 165594 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:28,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:28,765 INFO L93 Difference]: Finished difference Result 327655 states and 348716 transitions. [2022-12-13 15:08:28,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:28,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 366 [2022-12-13 15:08:28,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:29,032 INFO L225 Difference]: With dead ends: 327655 [2022-12-13 15:08:29,032 INFO L226 Difference]: Without dead ends: 173485 [2022-12-13 15:08:29,067 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:08:29,067 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 166 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:29,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 323 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:08:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173485 states. [2022-12-13 15:08:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173485 to 173457. [2022-12-13 15:08:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173457 states, 173456 states have (on average 1.0604072502536666) internal successors, (183934), 173456 states have internal predecessors, (183934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173457 states to 173457 states and 183934 transitions. [2022-12-13 15:08:30,964 INFO L78 Accepts]: Start accepts. Automaton has 173457 states and 183934 transitions. Word has length 366 [2022-12-13 15:08:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:30,965 INFO L495 AbstractCegarLoop]: Abstraction has 173457 states and 183934 transitions. [2022-12-13 15:08:30,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 173457 states and 183934 transitions. [2022-12-13 15:08:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-12-13 15:08:30,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:30,992 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 15:08:30,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 15:08:30,992 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1124981834, now seen corresponding path program 1 times [2022-12-13 15:08:30,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:30,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875061714] [2022-12-13 15:08:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:30,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 221 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:32,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:32,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875061714] [2022-12-13 15:08:32,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875061714] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:32,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393693965] [2022-12-13 15:08:32,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:32,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:32,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:32,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:32,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:08:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:32,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:08:32,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-13 15:08:33,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:33,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393693965] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:33,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:08:33,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-13 15:08:33,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393029256] [2022-12-13 15:08:33,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:33,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:08:33,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:08:33,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:08:33,046 INFO L87 Difference]: Start difference. First operand 173457 states and 183934 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:34,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:34,179 INFO L93 Difference]: Finished difference Result 349416 states and 371083 transitions. [2022-12-13 15:08:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:08:34,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 383 [2022-12-13 15:08:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:34,355 INFO L225 Difference]: With dead ends: 349416 [2022-12-13 15:08:34,355 INFO L226 Difference]: Without dead ends: 177179 [2022-12-13 15:08:34,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:08:34,427 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 53 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:34,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 315 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:08:34,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177179 states. [2022-12-13 15:08:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177179 to 173853. [2022-12-13 15:08:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173853 states, 173852 states have (on average 1.0601603662885672) internal successors, (184311), 173852 states have internal predecessors, (184311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173853 states to 173853 states and 184311 transitions. [2022-12-13 15:08:36,562 INFO L78 Accepts]: Start accepts. Automaton has 173853 states and 184311 transitions. Word has length 383 [2022-12-13 15:08:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:36,562 INFO L495 AbstractCegarLoop]: Abstraction has 173853 states and 184311 transitions. [2022-12-13 15:08:36,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 173853 states and 184311 transitions. [2022-12-13 15:08:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-12-13 15:08:36,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:36,592 INFO L195 NwaCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:36,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 15:08:36,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:36,794 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2057443229, now seen corresponding path program 1 times [2022-12-13 15:08:36,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:36,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629453375] [2022-12-13 15:08:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:36,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-12-13 15:08:37,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:37,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629453375] [2022-12-13 15:08:37,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629453375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:37,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:08:37,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:08:37,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749716131] [2022-12-13 15:08:37,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:37,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:08:37,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:08:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:08:37,065 INFO L87 Difference]: Start difference. First operand 173853 states and 184311 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:39,193 INFO L93 Difference]: Finished difference Result 478767 states and 507483 transitions. [2022-12-13 15:08:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:08:39,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 395 [2022-12-13 15:08:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:39,538 INFO L225 Difference]: With dead ends: 478767 [2022-12-13 15:08:39,539 INFO L226 Difference]: Without dead ends: 306337 [2022-12-13 15:08:39,626 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:08:39,627 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 703 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:39,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 300 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 15:08:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306337 states. [2022-12-13 15:08:43,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306337 to 301248. [2022-12-13 15:08:43,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301248 states, 301247 states have (on average 1.059582336089654) internal successors, (319196), 301247 states have internal predecessors, (319196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301248 states to 301248 states and 319196 transitions. [2022-12-13 15:08:43,601 INFO L78 Accepts]: Start accepts. Automaton has 301248 states and 319196 transitions. Word has length 395 [2022-12-13 15:08:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:43,601 INFO L495 AbstractCegarLoop]: Abstraction has 301248 states and 319196 transitions. [2022-12-13 15:08:43,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 301248 states and 319196 transitions. [2022-12-13 15:08:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-12-13 15:08:43,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:43,646 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 15:08:43,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 15:08:43,646 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:43,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:43,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1777016498, now seen corresponding path program 1 times [2022-12-13 15:08:43,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:43,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637422547] [2022-12-13 15:08:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:43,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 258 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:45,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:45,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637422547] [2022-12-13 15:08:45,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637422547] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:45,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945839306] [2022-12-13 15:08:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:45,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:45,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:45,277 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:45,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:08:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:45,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:08:45,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 15:08:45,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:45,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945839306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:45,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:08:45,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-12-13 15:08:45,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486800703] [2022-12-13 15:08:45,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:45,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:08:45,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:08:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:08:45,673 INFO L87 Difference]: Start difference. First operand 301248 states and 319196 transitions. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:47,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:47,687 INFO L93 Difference]: Finished difference Result 618350 states and 654613 transitions. [2022-12-13 15:08:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:08:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 415 [2022-12-13 15:08:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:48,058 INFO L225 Difference]: With dead ends: 618350 [2022-12-13 15:08:48,058 INFO L226 Difference]: Without dead ends: 318525 [2022-12-13 15:08:48,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:08:48,174 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 439 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:48,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 319 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 15:08:48,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318525 states. [2022-12-13 15:08:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318525 to 279933. [2022-12-13 15:08:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279933 states, 279932 states have (on average 1.0605575639798237) internal successors, (296884), 279932 states have internal predecessors, (296884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279933 states to 279933 states and 296884 transitions. [2022-12-13 15:08:52,348 INFO L78 Accepts]: Start accepts. Automaton has 279933 states and 296884 transitions. Word has length 415 [2022-12-13 15:08:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:52,348 INFO L495 AbstractCegarLoop]: Abstraction has 279933 states and 296884 transitions. [2022-12-13 15:08:52,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 279933 states and 296884 transitions. [2022-12-13 15:08:52,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-12-13 15:08:52,384 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:52,384 INFO L195 NwaCegarLoop]: 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, 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, 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, 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] [2022-12-13 15:08:52,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 15:08:52,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:52,586 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:52,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash 365271734, now seen corresponding path program 1 times [2022-12-13 15:08:52,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:52,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21810130] [2022-12-13 15:08:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:52,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 282 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 15:08:53,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:53,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21810130] [2022-12-13 15:08:53,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21810130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:53,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000762446] [2022-12-13 15:08:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:53,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:53,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:53,139 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:53,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:08:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:53,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:08:53,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 15:08:53,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:08:53,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000762446] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:08:53,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:08:53,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-13 15:08:53,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418594627] [2022-12-13 15:08:53,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:08:53,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:08:53,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:53,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:08:53,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:53,566 INFO L87 Difference]: Start difference. First operand 279933 states and 296884 transitions. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:08:55,361 INFO L93 Difference]: Finished difference Result 560338 states and 594573 transitions. [2022-12-13 15:08:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:08:55,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 448 [2022-12-13 15:08:55,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:08:55,659 INFO L225 Difference]: With dead ends: 560338 [2022-12-13 15:08:55,659 INFO L226 Difference]: Without dead ends: 281828 [2022-12-13 15:08:55,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:08:55,901 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 394 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:08:55,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 306 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 15:08:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281828 states. [2022-12-13 15:08:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281828 to 276886. [2022-12-13 15:08:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276886 states, 276885 states have (on average 1.0607616880654422) internal successors, (293709), 276885 states have internal predecessors, (293709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276886 states to 276886 states and 293709 transitions. [2022-12-13 15:08:59,553 INFO L78 Accepts]: Start accepts. Automaton has 276886 states and 293709 transitions. Word has length 448 [2022-12-13 15:08:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:08:59,554 INFO L495 AbstractCegarLoop]: Abstraction has 276886 states and 293709 transitions. [2022-12-13 15:08:59,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:08:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 276886 states and 293709 transitions. [2022-12-13 15:08:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-12-13 15:08:59,590 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:08:59,590 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:59,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 15:08:59,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:59,792 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:08:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:59,793 INFO L85 PathProgramCache]: Analyzing trace with hash 359729030, now seen corresponding path program 1 times [2022-12-13 15:08:59,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:59,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544264821] [2022-12-13 15:08:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:59,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-12-13 15:09:00,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:09:00,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544264821] [2022-12-13 15:09:00,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544264821] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:09:00,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:09:00,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:09:00,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733253788] [2022-12-13 15:09:00,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:09:00,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:09:00,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:09:00,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:09:00,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:09:00,299 INFO L87 Difference]: Start difference. First operand 276886 states and 293709 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) [2022-12-13 15:09:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:09:02,076 INFO L93 Difference]: Finished difference Result 586105 states and 622078 transitions. [2022-12-13 15:09:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:09:02,076 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 455 [2022-12-13 15:09:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:09:02,422 INFO L225 Difference]: With dead ends: 586105 [2022-12-13 15:09:02,422 INFO L226 Difference]: Without dead ends: 310642 [2022-12-13 15:09:02,515 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:09:02,515 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 197 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:09:02,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 151 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:09:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310642 states. [2022-12-13 15:09:05,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310642 to 306775. [2022-12-13 15:09:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306775 states, 306774 states have (on average 1.0617457802812493) internal successors, (325716), 306774 states have internal predecessors, (325716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306775 states to 306775 states and 325716 transitions. [2022-12-13 15:09:06,582 INFO L78 Accepts]: Start accepts. Automaton has 306775 states and 325716 transitions. Word has length 455 [2022-12-13 15:09:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:09:06,583 INFO L495 AbstractCegarLoop]: Abstraction has 306775 states and 325716 transitions. [2022-12-13 15:09:06,583 INFO L496 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) [2022-12-13 15:09:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 306775 states and 325716 transitions. [2022-12-13 15:09:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-12-13 15:09:06,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:09:06,626 INFO L195 NwaCegarLoop]: 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:09:06,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 15:09:06,626 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:09:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:09:06,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1449438331, now seen corresponding path program 1 times [2022-12-13 15:09:06,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:09:06,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825990591] [2022-12-13 15:09:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:06,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:09:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 364 proven. 12 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-13 15:09:07,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:09:07,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825990591] [2022-12-13 15:09:07,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825990591] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:09:07,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687947789] [2022-12-13 15:09:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:07,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:09:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:09:07,285 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:09:07,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:09:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:07,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:09:07,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:09:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-13 15:09:07,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:09:07,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687947789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:09:07,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:09:07,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-13 15:09:07,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351621808] [2022-12-13 15:09:07,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:09:07,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:09:07,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:09:07,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:09:07,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:09:07,723 INFO L87 Difference]: Start difference. First operand 306775 states and 325716 transitions. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:09:09,972 INFO L93 Difference]: Finished difference Result 615604 states and 653600 transitions. [2022-12-13 15:09:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:09:09,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 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 456 [2022-12-13 15:09:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:09:10,319 INFO L225 Difference]: With dead ends: 615604 [2022-12-13 15:09:10,320 INFO L226 Difference]: Without dead ends: 310457 [2022-12-13 15:09:10,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:09:10,421 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 280 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:09:10,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 126 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 15:09:10,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310457 states. [2022-12-13 15:09:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310457 to 302715. [2022-12-13 15:09:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302715 states, 302714 states have (on average 1.0592836803055028) internal successors, (320660), 302714 states have internal predecessors, (320660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302715 states to 302715 states and 320660 transitions. [2022-12-13 15:09:14,433 INFO L78 Accepts]: Start accepts. Automaton has 302715 states and 320660 transitions. Word has length 456 [2022-12-13 15:09:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:09:14,434 INFO L495 AbstractCegarLoop]: Abstraction has 302715 states and 320660 transitions. [2022-12-13 15:09:14,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 302715 states and 320660 transitions. [2022-12-13 15:09:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2022-12-13 15:09:14,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:09:14,479 INFO L195 NwaCegarLoop]: 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:09:14,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 15:09:14,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 15:09:14,680 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:09:14,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:09:14,681 INFO L85 PathProgramCache]: Analyzing trace with hash 777925708, now seen corresponding path program 1 times [2022-12-13 15:09:14,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:09:14,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053557342] [2022-12-13 15:09:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:14,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:09:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 306 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 15:09:16,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:09:16,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053557342] [2022-12-13 15:09:16,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053557342] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:09:16,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283433250] [2022-12-13 15:09:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:16,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:09:16,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:09:16,185 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:09:16,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:09:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:16,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:09:16,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:09:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 15:09:16,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:09:16,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283433250] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:09:16,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:09:16,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 15:09:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747713300] [2022-12-13 15:09:16,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:09:16,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:09:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:09:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:09:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:09:16,694 INFO L87 Difference]: Start difference. First operand 302715 states and 320660 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:18,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:09:18,575 INFO L93 Difference]: Finished difference Result 603012 states and 638833 transitions. [2022-12-13 15:09:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:09:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 472 [2022-12-13 15:09:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:09:18,888 INFO L225 Difference]: With dead ends: 603012 [2022-12-13 15:09:18,888 INFO L226 Difference]: Without dead ends: 301925 [2022-12-13 15:09:18,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:09:18,965 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 72 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:09:18,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 336 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:09:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301925 states. [2022-12-13 15:09:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301925 to 300478. [2022-12-13 15:09:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300478 states, 300477 states have (on average 1.0568030165370395) internal successors, (317545), 300477 states have internal predecessors, (317545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300478 states to 300478 states and 317545 transitions. [2022-12-13 15:09:22,888 INFO L78 Accepts]: Start accepts. Automaton has 300478 states and 317545 transitions. Word has length 472 [2022-12-13 15:09:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:09:22,889 INFO L495 AbstractCegarLoop]: Abstraction has 300478 states and 317545 transitions. [2022-12-13 15:09:22,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 300478 states and 317545 transitions. [2022-12-13 15:09:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2022-12-13 15:09:22,935 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:09:22,935 INFO L195 NwaCegarLoop]: 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:09:22,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 15:09:23,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 15:09:23,137 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:09:23,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:09:23,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1854173771, now seen corresponding path program 1 times [2022-12-13 15:09:23,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:09:23,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605368374] [2022-12-13 15:09:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:23,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:09:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 383 proven. 12 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-13 15:09:23,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:09:23,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605368374] [2022-12-13 15:09:23,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605368374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:09:23,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168384404] [2022-12-13 15:09:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:23,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:09:23,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:09:23,803 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:09:23,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 15:09:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:24,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:09:24,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:09:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 389 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-13 15:09:24,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:09:24,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168384404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:09:24,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:09:24,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 15:09:24,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715148034] [2022-12-13 15:09:24,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:09:24,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:09:24,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:09:24,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:09:24,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:09:24,105 INFO L87 Difference]: Start difference. First operand 300478 states and 317545 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:09:25,915 INFO L93 Difference]: Finished difference Result 608299 states and 642773 transitions. [2022-12-13 15:09:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:09:25,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 473 [2022-12-13 15:09:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:09:26,255 INFO L225 Difference]: With dead ends: 608299 [2022-12-13 15:09:26,255 INFO L226 Difference]: Without dead ends: 309246 [2022-12-13 15:09:26,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:09:26,364 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 169 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:09:26,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 335 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:09:26,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309246 states. [2022-12-13 15:09:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309246 to 303929. [2022-12-13 15:09:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303929 states, 303928 states have (on average 1.0555032770919428) internal successors, (320797), 303928 states have internal predecessors, (320797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303929 states to 303929 states and 320797 transitions. [2022-12-13 15:09:30,252 INFO L78 Accepts]: Start accepts. Automaton has 303929 states and 320797 transitions. Word has length 473 [2022-12-13 15:09:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:09:30,253 INFO L495 AbstractCegarLoop]: Abstraction has 303929 states and 320797 transitions. [2022-12-13 15:09:30,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 303929 states and 320797 transitions. [2022-12-13 15:09:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-12-13 15:09:30,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:09:30,297 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 15:09:30,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 15:09:30,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 15:09:30,498 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:09:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:09:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1805955798, now seen corresponding path program 1 times [2022-12-13 15:09:30,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:09:30,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765062814] [2022-12-13 15:09:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:30,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:09:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 342 proven. 9 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-12-13 15:09:31,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:09:31,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765062814] [2022-12-13 15:09:31,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765062814] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:09:31,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676468934] [2022-12-13 15:09:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:31,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:09:31,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:09:31,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:09:31,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 15:09:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:31,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 15:09:31,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:09:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 419 proven. 0 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-12-13 15:09:31,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:09:31,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676468934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:09:31,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:09:31,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-13 15:09:31,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500124303] [2022-12-13 15:09:31,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:09:31,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:09:31,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:09:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:09:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:09:31,497 INFO L87 Difference]: Start difference. First operand 303929 states and 320797 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:09:33,727 INFO L93 Difference]: Finished difference Result 819907 states and 866500 transitions. [2022-12-13 15:09:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:09:33,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 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 478 [2022-12-13 15:09:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:09:34,298 INFO L225 Difference]: With dead ends: 819907 [2022-12-13 15:09:34,298 INFO L226 Difference]: Without dead ends: 517403 [2022-12-13 15:09:34,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:09:34,387 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 150 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:09:34,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 487 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:09:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517403 states. [2022-12-13 15:09:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517403 to 517380. [2022-12-13 15:09:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517380 states, 517379 states have (on average 1.056784291592817) internal successors, (546758), 517379 states have internal predecessors, (546758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517380 states to 517380 states and 546758 transitions. [2022-12-13 15:09:41,053 INFO L78 Accepts]: Start accepts. Automaton has 517380 states and 546758 transitions. Word has length 478 [2022-12-13 15:09:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:09:41,053 INFO L495 AbstractCegarLoop]: Abstraction has 517380 states and 546758 transitions. [2022-12-13 15:09:41,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:41,053 INFO L276 IsEmpty]: Start isEmpty. Operand 517380 states and 546758 transitions. [2022-12-13 15:09:41,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-12-13 15:09:41,095 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:09:41,096 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:09:41,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 15:09:41,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 15:09:41,297 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:09:41,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:09:41,299 INFO L85 PathProgramCache]: Analyzing trace with hash -459148713, now seen corresponding path program 1 times [2022-12-13 15:09:41,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:09:41,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450556842] [2022-12-13 15:09:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:41,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:09:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 323 proven. 9 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 15:09:42,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:09:42,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450556842] [2022-12-13 15:09:42,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450556842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:09:42,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979310371] [2022-12-13 15:09:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:42,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:09:42,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:09:42,021 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:09:42,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 15:09:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:42,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:09:42,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:09:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-13 15:09:42,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:09:42,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979310371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:09:42,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:09:42,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 15:09:42,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134056986] [2022-12-13 15:09:42,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:09:42,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:09:42,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:09:42,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:09:42,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:09:42,333 INFO L87 Difference]: Start difference. First operand 517380 states and 546758 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:09:45,341 INFO L93 Difference]: Finished difference Result 1008775 states and 1065147 transitions. [2022-12-13 15:09:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:09:45,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 479 [2022-12-13 15:09:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:09:45,972 INFO L225 Difference]: With dead ends: 1008775 [2022-12-13 15:09:45,972 INFO L226 Difference]: Without dead ends: 492820 [2022-12-13 15:09:46,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:09:46,137 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 210 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:09:46,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 341 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:09:46,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492820 states. [2022-12-13 15:09:51,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492820 to 478130. [2022-12-13 15:09:51,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478130 states, 478129 states have (on average 1.0520487148865683) internal successors, (503015), 478129 states have internal predecessors, (503015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:52,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478130 states to 478130 states and 503015 transitions. [2022-12-13 15:09:52,163 INFO L78 Accepts]: Start accepts. Automaton has 478130 states and 503015 transitions. Word has length 479 [2022-12-13 15:09:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:09:52,163 INFO L495 AbstractCegarLoop]: Abstraction has 478130 states and 503015 transitions. [2022-12-13 15:09:52,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:52,163 INFO L276 IsEmpty]: Start isEmpty. Operand 478130 states and 503015 transitions. [2022-12-13 15:09:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2022-12-13 15:09:52,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:09:52,205 INFO L195 NwaCegarLoop]: 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:09:52,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 15:09:52,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f443f8e2-8d6b-4817-8fe9-baf793073399/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:09:52,406 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:09:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:09:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash -570594709, now seen corresponding path program 1 times [2022-12-13 15:09:52,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:09:52,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832554954] [2022-12-13 15:09:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:52,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:09:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-13 15:09:52,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:09:52,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832554954] [2022-12-13 15:09:52,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832554954] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:09:52,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:09:52,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:09:52,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851126202] [2022-12-13 15:09:52,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:09:52,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:09:52,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:09:52,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:09:52,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:09:52,978 INFO L87 Difference]: Start difference. First operand 478130 states and 503015 transitions. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:09:56,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:09:56,696 INFO L93 Difference]: Finished difference Result 1201118 states and 1264366 transitions. [2022-12-13 15:09:56,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:09:56,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 484 [2022-12-13 15:09:56,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:09:57,688 INFO L225 Difference]: With dead ends: 1201118 [2022-12-13 15:09:57,688 INFO L226 Difference]: Without dead ends: 725028 [2022-12-13 15:09:57,814 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:09:57,814 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 519 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:09:57,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 270 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 15:09:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725028 states.