./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label39.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label39.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL --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 e75b25accfa51338058ad16425748718d01a5d94bd667d18c22ba63a9d75c3da --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:24:29,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:24:29,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:24:29,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:24:29,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:24:29,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:24:29,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:24:29,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:24:29,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:24:29,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:24:29,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:24:29,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:24:29,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:24:29,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:24:29,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:24:29,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:24:29,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:24:29,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:24:29,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:24:29,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:24:29,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:24:29,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:24:29,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:24:29,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:24:29,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:24:29,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:24:29,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:24:29,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:24:29,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:24:29,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:24:29,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:24:29,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:24:29,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:24:29,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:24:29,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:24:29,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:24:29,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:24:29,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:24:29,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:24:29,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:24:29,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:24:29,822 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:24:29,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:24:29,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:24:29,880 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:24:29,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:24:29,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:24:29,882 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:24:29,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:24:29,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:24:29,884 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:24:29,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:24:29,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:24:29,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:24:29,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:24:29,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:24:29,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:24:29,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:24:29,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:24:29,888 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:24:29,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:24:29,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:24:29,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:24:29,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:24:29,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:24:29,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:24:29,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:24:29,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:24:29,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:24:29,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:24:29,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:24:29,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:24:29,904 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:24:29,904 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:24:29,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:24:29,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:24:29,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e75b25accfa51338058ad16425748718d01a5d94bd667d18c22ba63a9d75c3da [2021-11-19 05:24:30,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:24:30,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:24:30,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:24:30,340 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:24:30,341 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:24:30,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/eca-rers2012/Problem03_label39.c [2021-11-19 05:24:30,431 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/data/6ee87ef9d/89f4671da37c4fbb987b6b6d4513741a/FLAG7b375de6c [2021-11-19 05:24:31,450 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:24:31,451 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/sv-benchmarks/c/eca-rers2012/Problem03_label39.c [2021-11-19 05:24:31,482 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/data/6ee87ef9d/89f4671da37c4fbb987b6b6d4513741a/FLAG7b375de6c [2021-11-19 05:24:31,949 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/data/6ee87ef9d/89f4671da37c4fbb987b6b6d4513741a [2021-11-19 05:24:31,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:24:31,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:24:31,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:24:31,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:24:31,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:24:31,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:31" (1/1) ... [2021-11-19 05:24:31,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@421577c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:31, skipping insertion in model container [2021-11-19 05:24:31,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:31" (1/1) ... [2021-11-19 05:24:31,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:24:32,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:24:32,745 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/sv-benchmarks/c/eca-rers2012/Problem03_label39.c[54057,54070] [2021-11-19 05:24:32,784 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:24:32,794 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:24:33,073 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/sv-benchmarks/c/eca-rers2012/Problem03_label39.c[54057,54070] [2021-11-19 05:24:33,095 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:24:33,115 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:24:33,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33 WrapperNode [2021-11-19 05:24:33,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:24:33,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:24:33,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:24:33,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:24:33,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33" (1/1) ... [2021-11-19 05:24:33,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33" (1/1) ... [2021-11-19 05:24:33,253 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-19 05:24:33,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:24:33,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:24:33,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:24:33,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:24:33,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33" (1/1) ... [2021-11-19 05:24:33,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33" (1/1) ... [2021-11-19 05:24:33,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33" (1/1) ... [2021-11-19 05:24:33,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33" (1/1) ... [2021-11-19 05:24:33,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33" (1/1) ... [2021-11-19 05:24:33,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33" (1/1) ... [2021-11-19 05:24:33,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33" (1/1) ... [2021-11-19 05:24:33,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:24:33,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:24:33,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:24:33,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:24:33,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33" (1/1) ... [2021-11-19 05:24:33,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:24:33,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:33,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:24:33,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:24:33,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:24:33,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:24:33,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:24:33,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:24:33,689 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:24:33,691 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:24:35,626 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:24:35,645 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:24:35,645 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 05:24:35,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:35 BoogieIcfgContainer [2021-11-19 05:24:35,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:24:35,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:24:35,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:24:35,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:24:35,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:24:31" (1/3) ... [2021-11-19 05:24:35,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbc8a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:35, skipping insertion in model container [2021-11-19 05:24:35,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:33" (2/3) ... [2021-11-19 05:24:35,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbc8a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:35, skipping insertion in model container [2021-11-19 05:24:35,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:35" (3/3) ... [2021-11-19 05:24:35,659 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label39.c [2021-11-19 05:24:35,665 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:24:35,666 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:24:35,738 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:24:35,749 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 05:24:35,749 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:24:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 05:24:35,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:35,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:35,819 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:35,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1090968285, now seen corresponding path program 1 times [2021-11-19 05:24:35,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:35,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239272125] [2021-11-19 05:24:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:35,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:36,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:36,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239272125] [2021-11-19 05:24:36,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239272125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:36,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:36,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:24:36,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229174965] [2021-11-19 05:24:36,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:36,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:24:36,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:36,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:24:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:36,510 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 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:37,876 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2021-11-19 05:24:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:24:37,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-19 05:24:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:37,896 INFO L225 Difference]: With dead ends: 836 [2021-11-19 05:24:37,896 INFO L226 Difference]: Without dead ends: 457 [2021-11-19 05:24:37,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:37,905 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 136 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:37,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 05:24:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-19 05:24:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2021-11-19 05:24:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2021-11-19 05:24:37,980 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 147 [2021-11-19 05:24:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:37,981 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2021-11-19 05:24:37,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2021-11-19 05:24:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 05:24:37,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:37,987 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 05:24:37,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:24:37,988 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash -780294121, now seen corresponding path program 1 times [2021-11-19 05:24:37,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:37,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923923585] [2021-11-19 05:24:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:37,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:38,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:38,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923923585] [2021-11-19 05:24:38,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923923585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:38,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:38,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:24:38,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041878015] [2021-11-19 05:24:38,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:38,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:24:38,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:38,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:24:38,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:38,123 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:39,126 INFO L93 Difference]: Finished difference Result 1340 states and 2142 transitions. [2021-11-19 05:24:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:24:39,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-19 05:24:39,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:39,135 INFO L225 Difference]: With dead ends: 1340 [2021-11-19 05:24:39,135 INFO L226 Difference]: Without dead ends: 891 [2021-11-19 05:24:39,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:39,150 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:39,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 141 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 05:24:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-11-19 05:24:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 886. [2021-11-19 05:24:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.5785310734463276) internal successors, (1397), 885 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1397 transitions. [2021-11-19 05:24:39,229 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1397 transitions. Word has length 153 [2021-11-19 05:24:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:39,241 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1397 transitions. [2021-11-19 05:24:39,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1397 transitions. [2021-11-19 05:24:39,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 05:24:39,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:39,254 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 05:24:39,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:24:39,255 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1937089801, now seen corresponding path program 1 times [2021-11-19 05:24:39,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:39,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147191839] [2021-11-19 05:24:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:39,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:39,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:39,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147191839] [2021-11-19 05:24:39,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147191839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:39,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:39,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:24:39,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129457053] [2021-11-19 05:24:39,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:39,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:24:39,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:39,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:24:39,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:39,471 INFO L87 Difference]: Start difference. First operand 886 states and 1397 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:40,490 INFO L93 Difference]: Finished difference Result 2605 states and 4115 transitions. [2021-11-19 05:24:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:24:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2021-11-19 05:24:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:40,503 INFO L225 Difference]: With dead ends: 2605 [2021-11-19 05:24:40,503 INFO L226 Difference]: Without dead ends: 1721 [2021-11-19 05:24:40,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:40,507 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 234 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:40,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 124 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 05:24:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-11-19 05:24:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2021-11-19 05:24:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5017462165308497) internal successors, (2580), 1718 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2580 transitions. [2021-11-19 05:24:40,589 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2580 transitions. Word has length 157 [2021-11-19 05:24:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:40,589 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2580 transitions. [2021-11-19 05:24:40,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2580 transitions. [2021-11-19 05:24:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-19 05:24:40,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:40,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:40,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:24:40,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2144550674, now seen corresponding path program 1 times [2021-11-19 05:24:40,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:40,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860124178] [2021-11-19 05:24:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:40,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:40,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:40,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860124178] [2021-11-19 05:24:40,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860124178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:40,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:40,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:24:40,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351768528] [2021-11-19 05:24:40,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:40,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:24:40,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:40,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:24:40,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:40,758 INFO L87 Difference]: Start difference. First operand 1719 states and 2580 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:41,846 INFO L93 Difference]: Finished difference Result 5126 states and 7705 transitions. [2021-11-19 05:24:41,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:24:41,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-11-19 05:24:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:41,871 INFO L225 Difference]: With dead ends: 5126 [2021-11-19 05:24:41,871 INFO L226 Difference]: Without dead ends: 3409 [2021-11-19 05:24:41,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:41,886 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:41,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 181 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 05:24:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-11-19 05:24:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3397. [2021-11-19 05:24:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 1.4840989399293287) internal successors, (5040), 3396 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 5040 transitions. [2021-11-19 05:24:42,045 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 5040 transitions. Word has length 159 [2021-11-19 05:24:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:42,046 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 5040 transitions. [2021-11-19 05:24:42,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 5040 transitions. [2021-11-19 05:24:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 05:24:42,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:42,056 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 05:24:42,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 05:24:42,057 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:42,061 INFO L85 PathProgramCache]: Analyzing trace with hash 741517523, now seen corresponding path program 1 times [2021-11-19 05:24:42,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:42,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529801536] [2021-11-19 05:24:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:42,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:42,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:42,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529801536] [2021-11-19 05:24:42,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529801536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:42,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:42,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:24:42,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507855728] [2021-11-19 05:24:42,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:42,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:24:42,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:42,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:24:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:42,199 INFO L87 Difference]: Start difference. First operand 3397 states and 5040 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:43,292 INFO L93 Difference]: Finished difference Result 10089 states and 14975 transitions. [2021-11-19 05:24:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:24:43,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-19 05:24:43,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:43,342 INFO L225 Difference]: With dead ends: 10089 [2021-11-19 05:24:43,342 INFO L226 Difference]: Without dead ends: 6694 [2021-11-19 05:24:43,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:43,348 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 242 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:43,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 151 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 05:24:43,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2021-11-19 05:24:43,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 6687. [2021-11-19 05:24:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6687 states, 6686 states have (on average 1.4131020041878553) internal successors, (9448), 6686 states have internal predecessors, (9448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6687 states to 6687 states and 9448 transitions. [2021-11-19 05:24:43,576 INFO L78 Accepts]: Start accepts. Automaton has 6687 states and 9448 transitions. Word has length 161 [2021-11-19 05:24:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:43,577 INFO L470 AbstractCegarLoop]: Abstraction has 6687 states and 9448 transitions. [2021-11-19 05:24:43,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6687 states and 9448 transitions. [2021-11-19 05:24:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 05:24:43,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:43,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-19 05:24:43,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 05:24:43,599 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1080734270, now seen corresponding path program 1 times [2021-11-19 05:24:43,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:43,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223969280] [2021-11-19 05:24:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:43,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:24:43,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:43,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223969280] [2021-11-19 05:24:43,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223969280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:43,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:43,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:24:43,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980106771] [2021-11-19 05:24:43,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:43,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:24:43,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:43,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:24:43,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:43,711 INFO L87 Difference]: Start difference. First operand 6687 states and 9448 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:45,084 INFO L93 Difference]: Finished difference Result 19868 states and 28068 transitions. [2021-11-19 05:24:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:24:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 164 [2021-11-19 05:24:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:45,198 INFO L225 Difference]: With dead ends: 19868 [2021-11-19 05:24:45,199 INFO L226 Difference]: Without dead ends: 13183 [2021-11-19 05:24:45,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:45,215 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 206 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:45,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 194 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 05:24:45,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13183 states. [2021-11-19 05:24:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13183 to 13183. [2021-11-19 05:24:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13183 states, 13182 states have (on average 1.2726445152480654) internal successors, (16776), 13182 states have internal predecessors, (16776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13183 states to 13183 states and 16776 transitions. [2021-11-19 05:24:45,684 INFO L78 Accepts]: Start accepts. Automaton has 13183 states and 16776 transitions. Word has length 164 [2021-11-19 05:24:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:45,685 INFO L470 AbstractCegarLoop]: Abstraction has 13183 states and 16776 transitions. [2021-11-19 05:24:45,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 13183 states and 16776 transitions. [2021-11-19 05:24:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 05:24:45,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:45,709 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:45,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 05:24:45,710 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:45,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2099805709, now seen corresponding path program 1 times [2021-11-19 05:24:45,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:45,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730515339] [2021-11-19 05:24:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:45,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:24:45,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:45,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730515339] [2021-11-19 05:24:45,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730515339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:45,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:45,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:24:45,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867176384] [2021-11-19 05:24:45,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:45,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:24:45,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:45,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:24:45,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:45,798 INFO L87 Difference]: Start difference. First operand 13183 states and 16776 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:47,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:47,083 INFO L93 Difference]: Finished difference Result 33713 states and 43627 transitions. [2021-11-19 05:24:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:24:47,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-19 05:24:47,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:47,133 INFO L225 Difference]: With dead ends: 33713 [2021-11-19 05:24:47,133 INFO L226 Difference]: Without dead ends: 20532 [2021-11-19 05:24:47,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:47,156 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 217 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:47,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 378 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 05:24:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20532 states. [2021-11-19 05:24:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20532 to 20522. [2021-11-19 05:24:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20522 states, 20521 states have (on average 1.2410701232883388) internal successors, (25468), 20521 states have internal predecessors, (25468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20522 states to 20522 states and 25468 transitions. [2021-11-19 05:24:47,841 INFO L78 Accepts]: Start accepts. Automaton has 20522 states and 25468 transitions. Word has length 168 [2021-11-19 05:24:47,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:47,844 INFO L470 AbstractCegarLoop]: Abstraction has 20522 states and 25468 transitions. [2021-11-19 05:24:47,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:47,846 INFO L276 IsEmpty]: Start isEmpty. Operand 20522 states and 25468 transitions. [2021-11-19 05:24:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-19 05:24:47,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:47,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:47,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 05:24:47,881 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:47,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:47,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2077006845, now seen corresponding path program 1 times [2021-11-19 05:24:47,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:47,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95365515] [2021-11-19 05:24:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:47,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:48,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:48,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95365515] [2021-11-19 05:24:48,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95365515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:48,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:48,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:24:48,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218364883] [2021-11-19 05:24:48,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:48,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:24:48,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:24:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:48,006 INFO L87 Difference]: Start difference. First operand 20522 states and 25468 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:49,394 INFO L93 Difference]: Finished difference Result 50471 states and 62495 transitions. [2021-11-19 05:24:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:24:49,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-11-19 05:24:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:49,489 INFO L225 Difference]: With dead ends: 50471 [2021-11-19 05:24:49,489 INFO L226 Difference]: Without dead ends: 29951 [2021-11-19 05:24:49,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:49,515 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 217 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:49,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 139 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 05:24:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29951 states. [2021-11-19 05:24:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29951 to 29926. [2021-11-19 05:24:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29926 states, 29925 states have (on average 1.2328153717627401) internal successors, (36892), 29925 states have internal predecessors, (36892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29926 states to 29926 states and 36892 transitions. [2021-11-19 05:24:50,334 INFO L78 Accepts]: Start accepts. Automaton has 29926 states and 36892 transitions. Word has length 175 [2021-11-19 05:24:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:50,336 INFO L470 AbstractCegarLoop]: Abstraction has 29926 states and 36892 transitions. [2021-11-19 05:24:50,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 29926 states and 36892 transitions. [2021-11-19 05:24:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 05:24:50,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:50,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:50,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 05:24:50,377 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:50,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1608446206, now seen corresponding path program 1 times [2021-11-19 05:24:50,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:50,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923563198] [2021-11-19 05:24:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:50,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:50,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:50,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923563198] [2021-11-19 05:24:50,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923563198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:50,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:50,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:24:50,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693214278] [2021-11-19 05:24:50,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:50,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:24:50,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:50,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:24:50,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:50,618 INFO L87 Difference]: Start difference. First operand 29926 states and 36892 transitions. 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) [2021-11-19 05:24:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:52,088 INFO L93 Difference]: Finished difference Result 72375 states and 90451 transitions. [2021-11-19 05:24:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:24:52,089 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 [2021-11-19 05:24:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:52,182 INFO L225 Difference]: With dead ends: 72375 [2021-11-19 05:24:52,183 INFO L226 Difference]: Without dead ends: 42451 [2021-11-19 05:24:52,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:52,220 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:52,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 241 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 05:24:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42451 states. [2021-11-19 05:24:53,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42451 to 42370. [2021-11-19 05:24:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42370 states, 42369 states have (on average 1.2558002313011871) internal successors, (53207), 42369 states have internal predecessors, (53207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42370 states to 42370 states and 53207 transitions. [2021-11-19 05:24:53,231 INFO L78 Accepts]: Start accepts. Automaton has 42370 states and 53207 transitions. Word has length 177 [2021-11-19 05:24:53,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:53,231 INFO L470 AbstractCegarLoop]: Abstraction has 42370 states and 53207 transitions. [2021-11-19 05:24:53,232 INFO L471 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) [2021-11-19 05:24:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand 42370 states and 53207 transitions. [2021-11-19 05:24:53,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-19 05:24:53,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:53,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:53,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 05:24:53,273 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1903788300, now seen corresponding path program 1 times [2021-11-19 05:24:53,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:53,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181940279] [2021-11-19 05:24:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:53,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:53,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:53,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181940279] [2021-11-19 05:24:53,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181940279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:53,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:53,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:24:53,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747525578] [2021-11-19 05:24:53,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:53,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:24:53,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:24:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:53,556 INFO L87 Difference]: Start difference. First operand 42370 states and 53207 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:55,168 INFO L93 Difference]: Finished difference Result 103360 states and 130038 transitions. [2021-11-19 05:24:55,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:24:55,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-19 05:24:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:55,281 INFO L225 Difference]: With dead ends: 103360 [2021-11-19 05:24:55,281 INFO L226 Difference]: Without dead ends: 61804 [2021-11-19 05:24:55,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:55,472 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:55,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 225 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 05:24:55,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61804 states. [2021-11-19 05:24:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61804 to 61780. [2021-11-19 05:24:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61780 states, 61779 states have (on average 1.2561550041276162) internal successors, (77604), 61779 states have internal predecessors, (77604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61780 states to 61780 states and 77604 transitions. [2021-11-19 05:24:57,200 INFO L78 Accepts]: Start accepts. Automaton has 61780 states and 77604 transitions. Word has length 181 [2021-11-19 05:24:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:57,200 INFO L470 AbstractCegarLoop]: Abstraction has 61780 states and 77604 transitions. [2021-11-19 05:24:57,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:24:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 61780 states and 77604 transitions. [2021-11-19 05:24:57,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 05:24:57,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:57,244 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:57,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 05:24:57,245 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:57,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1538858248, now seen corresponding path program 1 times [2021-11-19 05:24:57,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:57,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932128169] [2021-11-19 05:24:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:57,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:24:57,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:57,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932128169] [2021-11-19 05:24:57,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932128169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:57,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:57,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:24:57,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878397443] [2021-11-19 05:24:57,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:57,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:24:57,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:57,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:24:57,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:24:57,400 INFO L87 Difference]: Start difference. First operand 61780 states and 77604 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) [2021-11-19 05:24:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:59,711 INFO L93 Difference]: Finished difference Result 164867 states and 207696 transitions. [2021-11-19 05:24:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:24:59,712 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 [2021-11-19 05:24:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:59,922 INFO L225 Difference]: With dead ends: 164867 [2021-11-19 05:24:59,922 INFO L226 Difference]: Without dead ends: 103901 [2021-11-19 05:24:59,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:24:59,990 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 508 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:59,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 533 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 05:25:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103901 states. [2021-11-19 05:25:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103901 to 103858. [2021-11-19 05:25:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103858 states, 103857 states have (on average 1.2354583706442512) internal successors, (128311), 103857 states have internal predecessors, (128311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103858 states to 103858 states and 128311 transitions. [2021-11-19 05:25:02,029 INFO L78 Accepts]: Start accepts. Automaton has 103858 states and 128311 transitions. Word has length 192 [2021-11-19 05:25:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:02,029 INFO L470 AbstractCegarLoop]: Abstraction has 103858 states and 128311 transitions. [2021-11-19 05:25:02,029 INFO L471 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) [2021-11-19 05:25:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 103858 states and 128311 transitions. [2021-11-19 05:25:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 05:25:02,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:02,055 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:02,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 05:25:02,055 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:02,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1860977861, now seen corresponding path program 1 times [2021-11-19 05:25:02,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:02,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768195555] [2021-11-19 05:25:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:02,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:25:02,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:02,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768195555] [2021-11-19 05:25:02,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768195555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:02,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788088972] [2021-11-19 05:25:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:02,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:02,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:02,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:02,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:25:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:02,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:25:02,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 05:25:03,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:25:03,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788088972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:03,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:25:03,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-19 05:25:03,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679183013] [2021-11-19 05:25:03,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:03,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:03,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:03,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:25:03,063 INFO L87 Difference]: Start difference. First operand 103858 states and 128311 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:05,280 INFO L93 Difference]: Finished difference Result 203456 states and 254569 transitions. [2021-11-19 05:25:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:05,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-19 05:25:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:05,424 INFO L225 Difference]: With dead ends: 203456 [2021-11-19 05:25:05,425 INFO L226 Difference]: Without dead ends: 100412 [2021-11-19 05:25:05,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:25:05,484 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 90 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:05,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 406 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 05:25:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100412 states. [2021-11-19 05:25:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100412 to 100192. [2021-11-19 05:25:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100192 states, 100191 states have (on average 1.1668213711810442) internal successors, (116905), 100191 states have internal predecessors, (116905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100192 states to 100192 states and 116905 transitions. [2021-11-19 05:25:07,881 INFO L78 Accepts]: Start accepts. Automaton has 100192 states and 116905 transitions. Word has length 195 [2021-11-19 05:25:07,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:07,882 INFO L470 AbstractCegarLoop]: Abstraction has 100192 states and 116905 transitions. [2021-11-19 05:25:07,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 100192 states and 116905 transitions. [2021-11-19 05:25:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-19 05:25:07,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:07,919 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:07,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:08,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 05:25:08,134 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:08,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:08,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1670326217, now seen corresponding path program 1 times [2021-11-19 05:25:08,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:08,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826372270] [2021-11-19 05:25:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:08,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 05:25:08,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:08,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826372270] [2021-11-19 05:25:08,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826372270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:08,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492606812] [2021-11-19 05:25:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:08,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:08,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:08,292 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:08,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:25:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:08,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:25:08,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 05:25:08,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:25:08,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492606812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:08,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:25:08,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-19 05:25:08,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062607442] [2021-11-19 05:25:08,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:08,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:08,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:08,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:08,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:25:08,946 INFO L87 Difference]: Start difference. First operand 100192 states and 116905 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:10,513 INFO L93 Difference]: Finished difference Result 231144 states and 270978 transitions. [2021-11-19 05:25:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:10,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-11-19 05:25:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:10,726 INFO L225 Difference]: With dead ends: 231144 [2021-11-19 05:25:10,726 INFO L226 Difference]: Without dead ends: 157656 [2021-11-19 05:25:10,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:25:10,784 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 312 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:10,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 892 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:25:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157656 states. [2021-11-19 05:25:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157656 to 154201. [2021-11-19 05:25:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154201 states, 154200 states have (on average 1.1610505836575875) internal successors, (179034), 154200 states have internal predecessors, (179034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154201 states to 154201 states and 179034 transitions. [2021-11-19 05:25:13,698 INFO L78 Accepts]: Start accepts. Automaton has 154201 states and 179034 transitions. Word has length 218 [2021-11-19 05:25:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:13,699 INFO L470 AbstractCegarLoop]: Abstraction has 154201 states and 179034 transitions. [2021-11-19 05:25:13,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 154201 states and 179034 transitions. [2021-11-19 05:25:13,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-19 05:25:13,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:13,753 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:13,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:13,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:13,969 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:13,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1405678727, now seen corresponding path program 1 times [2021-11-19 05:25:13,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:13,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33883790] [2021-11-19 05:25:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:13,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 05:25:14,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:14,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33883790] [2021-11-19 05:25:14,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33883790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:14,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383005152] [2021-11-19 05:25:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:14,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:14,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:14,108 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:14,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:25:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:25:14,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 05:25:14,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:25:14,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383005152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:14,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:25:14,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-19 05:25:14,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547382169] [2021-11-19 05:25:14,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:14,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:14,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:14,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:14,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:25:14,781 INFO L87 Difference]: Start difference. First operand 154201 states and 179034 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:17,259 INFO L93 Difference]: Finished difference Result 333595 states and 388883 transitions. [2021-11-19 05:25:17,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:17,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-11-19 05:25:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:17,512 INFO L225 Difference]: With dead ends: 333595 [2021-11-19 05:25:17,513 INFO L226 Difference]: Without dead ends: 179802 [2021-11-19 05:25:17,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:25:17,589 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 90 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:17,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 363 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 05:25:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179802 states. [2021-11-19 05:25:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179802 to 179598. [2021-11-19 05:25:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179598 states, 179597 states have (on average 1.1587777078681716) internal successors, (208113), 179597 states have internal predecessors, (208113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179598 states to 179598 states and 208113 transitions. [2021-11-19 05:25:21,798 INFO L78 Accepts]: Start accepts. Automaton has 179598 states and 208113 transitions. Word has length 218 [2021-11-19 05:25:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:21,799 INFO L470 AbstractCegarLoop]: Abstraction has 179598 states and 208113 transitions. [2021-11-19 05:25:21,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 179598 states and 208113 transitions. [2021-11-19 05:25:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-19 05:25:21,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:21,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 05:25:21,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:22,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:22,048 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:22,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:22,048 INFO L85 PathProgramCache]: Analyzing trace with hash -194732802, now seen corresponding path program 1 times [2021-11-19 05:25:22,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:22,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480150756] [2021-11-19 05:25:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:22,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:25:22,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:22,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480150756] [2021-11-19 05:25:22,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480150756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:22,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:22,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:25:22,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836151420] [2021-11-19 05:25:22,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:22,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:22,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:22,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:22,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:25:22,199 INFO L87 Difference]: Start difference. First operand 179598 states and 208113 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:25,283 INFO L93 Difference]: Finished difference Result 358891 states and 417485 transitions. [2021-11-19 05:25:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-19 05:25:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:25,706 INFO L225 Difference]: With dead ends: 358891 [2021-11-19 05:25:25,706 INFO L226 Difference]: Without dead ends: 209454 [2021-11-19 05:25:25,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:25:25,792 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:25,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 226 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 05:25:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209454 states. [2021-11-19 05:25:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209454 to 201589. [2021-11-19 05:25:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201589 states, 201588 states have (on average 1.1675546163462112) internal successors, (235365), 201588 states have internal predecessors, (235365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201589 states to 201589 states and 235365 transitions. [2021-11-19 05:25:29,430 INFO L78 Accepts]: Start accepts. Automaton has 201589 states and 235365 transitions. Word has length 222 [2021-11-19 05:25:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:29,431 INFO L470 AbstractCegarLoop]: Abstraction has 201589 states and 235365 transitions. [2021-11-19 05:25:29,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 201589 states and 235365 transitions. [2021-11-19 05:25:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 05:25:29,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:29,476 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2021-11-19 05:25:29,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 05:25:29,477 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash -227102397, now seen corresponding path program 1 times [2021-11-19 05:25:29,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:29,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952250012] [2021-11-19 05:25:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:29,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-19 05:25:29,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:29,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952250012] [2021-11-19 05:25:29,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952250012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:29,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576607803] [2021-11-19 05:25:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:29,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:29,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:29,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:29,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4eac8c-5e9f-4312-84f6-e682fbdf8ee7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:25:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:29,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:25:29,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-19 05:25:30,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:25:30,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576607803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:30,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:25:30,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-19 05:25:30,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692054737] [2021-11-19 05:25:30,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:30,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:30,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:30,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:25:30,439 INFO L87 Difference]: Start difference. First operand 201589 states and 235365 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:35,153 INFO L93 Difference]: Finished difference Result 529859 states and 619149 transitions. [2021-11-19 05:25:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:35,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-19 05:25:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:35,757 INFO L225 Difference]: With dead ends: 529859 [2021-11-19 05:25:35,757 INFO L226 Difference]: Without dead ends: 330306 [2021-11-19 05:25:35,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:25:35,868 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 117 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:35,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 196 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 05:25:36,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330306 states.