./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6baa92d18991a792383fc99c5c300f37f700ba00714b15a3dbe7d2191a67ca9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:28:42,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:28:42,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:28:42,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:28:42,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:28:42,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:28:42,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:28:42,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:28:42,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:28:42,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:28:42,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:28:42,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:28:42,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:28:42,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:28:42,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:28:42,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:28:42,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:28:42,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:28:42,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:28:42,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:28:42,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:28:42,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:28:42,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:28:42,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:28:42,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:28:42,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:28:42,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:28:42,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:28:42,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:28:42,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:28:42,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:28:42,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:28:42,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:28:42,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:28:42,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:28:42,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:28:42,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:28:42,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:28:42,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:28:42,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:28:42,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:28:42,582 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:28:42,604 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:28:42,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:28:42,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:28:42,605 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:28:42,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:28:42,606 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:28:42,606 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:28:42,606 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:28:42,606 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:28:42,606 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:28:42,607 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:28:42,607 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:28:42,607 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:28:42,607 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:28:42,607 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:28:42,608 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:28:42,608 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:28:42,608 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:28:42,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:28:42,609 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:28:42,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:28:42,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:28:42,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:28:42,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:28:42,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:28:42,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:28:42,610 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:28:42,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:28:42,610 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:28:42,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:28:42,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:28:42,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:28:42,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:28:42,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:28:42,611 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:28:42,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:28:42,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:28:42,612 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:28:42,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:28:42,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:28:42,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:28:42,612 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_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6baa92d18991a792383fc99c5c300f37f700ba00714b15a3dbe7d2191a67ca9 [2022-12-14 06:28:42,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:28:42,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:28:42,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:28:42,799 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:28:42,800 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:28:42,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.07.cil-1.c [2022-12-14 06:28:45,370 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:28:45,520 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:28:45,521 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/sv-benchmarks/c/systemc/token_ring.07.cil-1.c [2022-12-14 06:28:45,528 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/data/7d03f4262/151524eb643746ae8d032d5dc46013ff/FLAG8ca8b6fd2 [2022-12-14 06:28:45,538 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/data/7d03f4262/151524eb643746ae8d032d5dc46013ff [2022-12-14 06:28:45,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:28:45,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:28:45,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:28:45,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:28:45,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:28:45,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c22aec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45, skipping insertion in model container [2022-12-14 06:28:45,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:28:45,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:28:45,675 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/sv-benchmarks/c/systemc/token_ring.07.cil-1.c[671,684] [2022-12-14 06:28:45,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:28:45,745 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:28:45,753 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/sv-benchmarks/c/systemc/token_ring.07.cil-1.c[671,684] [2022-12-14 06:28:45,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:28:45,814 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:28:45,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45 WrapperNode [2022-12-14 06:28:45,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:28:45,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:28:45,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:28:45,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:28:45,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,864 INFO L138 Inliner]: procedures = 42, calls = 52, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 563 [2022-12-14 06:28:45,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:28:45,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:28:45,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:28:45,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:28:45,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,900 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:28:45,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:28:45,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:28:45,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:28:45,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (1/1) ... [2022-12-14 06:28:45,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:28:45,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:45,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:28:45,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:28:45,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:28:45,965 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 06:28:45,965 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 06:28:45,965 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 06:28:45,965 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 06:28:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 06:28:45,966 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 06:28:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 06:28:45,966 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 06:28:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 06:28:45,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 06:28:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:28:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 06:28:45,967 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 06:28:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:28:45,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:28:46,042 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:28:46,044 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:28:46,486 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:28:46,702 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:28:46,702 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-14 06:28:46,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:28:46 BoogieIcfgContainer [2022-12-14 06:28:46,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:28:46,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:28:46,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:28:46,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:28:46,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:28:45" (1/3) ... [2022-12-14 06:28:46,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eead27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:28:46, skipping insertion in model container [2022-12-14 06:28:46,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:28:45" (2/3) ... [2022-12-14 06:28:46,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eead27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:28:46, skipping insertion in model container [2022-12-14 06:28:46,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:28:46" (3/3) ... [2022-12-14 06:28:46,711 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.07.cil-1.c [2022-12-14 06:28:46,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:28:46,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:28:46,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:28:46,773 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3152b64c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:28:46,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:28:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 104 states have (on average 1.5384615384615385) internal successors, (160), 106 states have internal predecessors, (160), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-14 06:28:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 06:28:46,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:46,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:46,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:46,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1406494880, now seen corresponding path program 1 times [2022-12-14 06:28:46,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:46,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442536374] [2022-12-14 06:28:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:46,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:28:47,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:47,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442536374] [2022-12-14 06:28:47,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442536374] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:47,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:28:47,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:28:47,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150562019] [2022-12-14 06:28:47,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:47,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:28:47,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:47,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:28:47,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:28:47,119 INFO L87 Difference]: Start difference. First operand has 133 states, 104 states have (on average 1.5384615384615385) internal successors, (160), 106 states have internal predecessors, (160), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:28:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:47,433 INFO L93 Difference]: Finished difference Result 383 states and 593 transitions. [2022-12-14 06:28:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:28:47,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-12-14 06:28:47,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:47,442 INFO L225 Difference]: With dead ends: 383 [2022-12-14 06:28:47,442 INFO L226 Difference]: Without dead ends: 251 [2022-12-14 06:28:47,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:28:47,447 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 347 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:47,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 530 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:28:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-12-14 06:28:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2022-12-14 06:28:47,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 199 states have (on average 1.4874371859296482) internal successors, (296), 201 states have internal predecessors, (296), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 06:28:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 372 transitions. [2022-12-14 06:28:47,504 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 372 transitions. Word has length 51 [2022-12-14 06:28:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:47,505 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 372 transitions. [2022-12-14 06:28:47,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:28:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 372 transitions. [2022-12-14 06:28:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 06:28:47,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:47,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:47,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:28:47,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:47,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:47,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1975473985, now seen corresponding path program 1 times [2022-12-14 06:28:47,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:47,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77805331] [2022-12-14 06:28:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:47,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:28:47,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:47,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77805331] [2022-12-14 06:28:47,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77805331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:28:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105739898] [2022-12-14 06:28:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:47,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:47,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:47,653 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:28:47,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:28:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:28:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:28:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:28:47,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:28:47,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105739898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:47,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:28:47,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 06:28:47,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574585700] [2022-12-14 06:28:47,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:47,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:28:47,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:47,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:28:47,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:28:47,870 INFO L87 Difference]: Start difference. First operand 250 states and 372 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:28:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:47,998 INFO L93 Difference]: Finished difference Result 733 states and 1109 transitions. [2022-12-14 06:28:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:28:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 100 [2022-12-14 06:28:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:48,003 INFO L225 Difference]: With dead ends: 733 [2022-12-14 06:28:48,003 INFO L226 Difference]: Without dead ends: 488 [2022-12-14 06:28:48,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:28:48,006 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 169 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:48,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 354 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:28:48,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-12-14 06:28:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 484. [2022-12-14 06:28:48,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 389 states have (on average 1.4832904884318765) internal successors, (577), 392 states have internal predecessors, (577), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-12-14 06:28:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 717 transitions. [2022-12-14 06:28:48,049 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 717 transitions. Word has length 100 [2022-12-14 06:28:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:48,050 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 717 transitions. [2022-12-14 06:28:48,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:28:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 717 transitions. [2022-12-14 06:28:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 06:28:48,056 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:48,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:48,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:28:48,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:48,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:48,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1472408447, now seen corresponding path program 1 times [2022-12-14 06:28:48,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:48,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3799737] [2022-12-14 06:28:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:48,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:28:48,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:48,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3799737] [2022-12-14 06:28:48,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3799737] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:28:48,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057078695] [2022-12-14 06:28:48,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:48,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:48,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:48,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:28:48,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:28:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:48,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:28:48,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:28:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 06:28:48,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:28:48,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057078695] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:48,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:28:48,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 06:28:48,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66762895] [2022-12-14 06:28:48,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:48,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:28:48,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:28:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:28:48,605 INFO L87 Difference]: Start difference. First operand 484 states and 717 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:28:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:48,731 INFO L93 Difference]: Finished difference Result 1429 states and 2152 transitions. [2022-12-14 06:28:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:28:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 100 [2022-12-14 06:28:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:48,736 INFO L225 Difference]: With dead ends: 1429 [2022-12-14 06:28:48,736 INFO L226 Difference]: Without dead ends: 950 [2022-12-14 06:28:48,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:28:48,740 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 172 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:48,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 353 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:28:48,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-12-14 06:28:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 944. [2022-12-14 06:28:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 763 states have (on average 1.4770642201834863) internal successors, (1127), 768 states have internal predecessors, (1127), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-12-14 06:28:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1391 transitions. [2022-12-14 06:28:48,790 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1391 transitions. Word has length 100 [2022-12-14 06:28:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:48,790 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1391 transitions. [2022-12-14 06:28:48,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:28:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1391 transitions. [2022-12-14 06:28:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 06:28:48,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:48,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:48,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:28:48,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:48,997 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:48,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:48,997 INFO L85 PathProgramCache]: Analyzing trace with hash 212138367, now seen corresponding path program 1 times [2022-12-14 06:28:48,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:48,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416463481] [2022-12-14 06:28:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:48,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:28:49,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:49,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416463481] [2022-12-14 06:28:49,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416463481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:28:49,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277471334] [2022-12-14 06:28:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:49,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:49,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:49,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:28:49,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:28:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:49,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:28:49,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:28:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:28:49,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:28:49,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277471334] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:49,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:28:49,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 06:28:49,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971917744] [2022-12-14 06:28:49,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:28:49,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:28:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:28:49,333 INFO L87 Difference]: Start difference. First operand 944 states and 1391 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:28:49,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:49,483 INFO L93 Difference]: Finished difference Result 2797 states and 4188 transitions. [2022-12-14 06:28:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:28:49,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 100 [2022-12-14 06:28:49,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:49,495 INFO L225 Difference]: With dead ends: 2797 [2022-12-14 06:28:49,495 INFO L226 Difference]: Without dead ends: 1858 [2022-12-14 06:28:49,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:28:49,500 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 163 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:49,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 327 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:28:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-12-14 06:28:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1848. [2022-12-14 06:28:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1499 states have (on average 1.4696464309539694) internal successors, (2203), 1508 states have internal predecessors, (2203), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-12-14 06:28:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 2707 transitions. [2022-12-14 06:28:49,600 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 2707 transitions. Word has length 100 [2022-12-14 06:28:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:49,601 INFO L495 AbstractCegarLoop]: Abstraction has 1848 states and 2707 transitions. [2022-12-14 06:28:49,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:28:49,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 2707 transitions. [2022-12-14 06:28:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 06:28:49,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:49,606 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:49,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:28:49,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:49,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:49,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1223319871, now seen corresponding path program 1 times [2022-12-14 06:28:49,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:49,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326654863] [2022-12-14 06:28:49,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:49,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:28:49,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:49,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326654863] [2022-12-14 06:28:49,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326654863] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:28:49,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294592696] [2022-12-14 06:28:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:49,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:49,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:49,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:28:49,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:28:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:50,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:28:50,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:28:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:28:50,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:28:50,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294592696] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:50,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:28:50,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 06:28:50,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941422756] [2022-12-14 06:28:50,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:50,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:28:50,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:28:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:28:50,056 INFO L87 Difference]: Start difference. First operand 1848 states and 2707 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:28:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:50,257 INFO L93 Difference]: Finished difference Result 5485 states and 8160 transitions. [2022-12-14 06:28:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:28:50,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 100 [2022-12-14 06:28:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:50,270 INFO L225 Difference]: With dead ends: 5485 [2022-12-14 06:28:50,270 INFO L226 Difference]: Without dead ends: 3642 [2022-12-14 06:28:50,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:28:50,276 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 157 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:50,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 327 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:28:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2022-12-14 06:28:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3624. [2022-12-14 06:28:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 2947 states have (on average 1.4614862572107228) internal successors, (4307), 2964 states have internal predecessors, (4307), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-12-14 06:28:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 5275 transitions. [2022-12-14 06:28:50,409 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 5275 transitions. Word has length 100 [2022-12-14 06:28:50,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:50,410 INFO L495 AbstractCegarLoop]: Abstraction has 3624 states and 5275 transitions. [2022-12-14 06:28:50,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:28:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 5275 transitions. [2022-12-14 06:28:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 06:28:50,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:50,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:50,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:28:50,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:50,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:50,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:50,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1758208637, now seen corresponding path program 1 times [2022-12-14 06:28:50,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:50,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080459518] [2022-12-14 06:28:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:50,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 06:28:50,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:50,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080459518] [2022-12-14 06:28:50,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080459518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:50,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:28:50,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:28:50,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367712829] [2022-12-14 06:28:50,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:50,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:28:50,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:50,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:28:50,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:28:50,700 INFO L87 Difference]: Start difference. First operand 3624 states and 5275 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:28:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:50,896 INFO L93 Difference]: Finished difference Result 6426 states and 9516 transitions. [2022-12-14 06:28:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:28:50,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 100 [2022-12-14 06:28:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:50,911 INFO L225 Difference]: With dead ends: 6426 [2022-12-14 06:28:50,911 INFO L226 Difference]: Without dead ends: 4584 [2022-12-14 06:28:50,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:28:50,917 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 83 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:50,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 415 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:28:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2022-12-14 06:28:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4264. [2022-12-14 06:28:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 3555 states have (on average 1.5040787623066103) internal successors, (5347), 3572 states have internal predecessors, (5347), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-12-14 06:28:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 6347 transitions. [2022-12-14 06:28:51,115 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 6347 transitions. Word has length 100 [2022-12-14 06:28:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:51,115 INFO L495 AbstractCegarLoop]: Abstraction has 4264 states and 6347 transitions. [2022-12-14 06:28:51,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:28:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 6347 transitions. [2022-12-14 06:28:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 06:28:51,123 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:51,123 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 06:28:51,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:28:51,123 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1685036010, now seen corresponding path program 1 times [2022-12-14 06:28:51,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:51,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946464475] [2022-12-14 06:28:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:51,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 06:28:51,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:51,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946464475] [2022-12-14 06:28:51,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946464475] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:51,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:28:51,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:28:51,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648191992] [2022-12-14 06:28:51,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:51,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:28:51,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:51,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:28:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:28:51,189 INFO L87 Difference]: Start difference. First operand 4264 states and 6347 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:28:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:51,462 INFO L93 Difference]: Finished difference Result 12637 states and 19024 transitions. [2022-12-14 06:28:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:28:51,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 135 [2022-12-14 06:28:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:51,488 INFO L225 Difference]: With dead ends: 12637 [2022-12-14 06:28:51,488 INFO L226 Difference]: Without dead ends: 8378 [2022-12-14 06:28:51,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:28:51,498 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 161 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:51,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 329 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:28:51,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8378 states. [2022-12-14 06:28:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8378 to 8328. [2022-12-14 06:28:51,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8328 states, 6947 states have (on average 1.4928746221390528) internal successors, (10371), 6980 states have internal predecessors, (10371), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-12-14 06:28:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8328 states to 8328 states and 12299 transitions. [2022-12-14 06:28:51,802 INFO L78 Accepts]: Start accepts. Automaton has 8328 states and 12299 transitions. Word has length 135 [2022-12-14 06:28:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:51,802 INFO L495 AbstractCegarLoop]: Abstraction has 8328 states and 12299 transitions. [2022-12-14 06:28:51,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:28:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 8328 states and 12299 transitions. [2022-12-14 06:28:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 06:28:51,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:51,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 06:28:51,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:28:51,817 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:51,818 INFO L85 PathProgramCache]: Analyzing trace with hash -331228179, now seen corresponding path program 1 times [2022-12-14 06:28:51,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:51,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136691206] [2022-12-14 06:28:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:51,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 06:28:51,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:51,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136691206] [2022-12-14 06:28:51,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136691206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:51,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:28:51,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:28:51,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297420367] [2022-12-14 06:28:51,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:51,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:28:51,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:51,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:28:51,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:28:51,875 INFO L87 Difference]: Start difference. First operand 8328 states and 12299 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:28:52,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:52,424 INFO L93 Difference]: Finished difference Result 24685 states and 36848 transitions. [2022-12-14 06:28:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:28:52,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 135 [2022-12-14 06:28:52,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:52,476 INFO L225 Difference]: With dead ends: 24685 [2022-12-14 06:28:52,477 INFO L226 Difference]: Without dead ends: 16362 [2022-12-14 06:28:52,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:28:52,495 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 163 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:52,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 329 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:28:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16362 states. [2022-12-14 06:28:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16362 to 16264. [2022-12-14 06:28:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16264 states, 13571 states have (on average 1.481025716601577) internal successors, (20099), 13636 states have internal predecessors, (20099), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-12-14 06:28:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16264 states to 16264 states and 23819 transitions. [2022-12-14 06:28:53,047 INFO L78 Accepts]: Start accepts. Automaton has 16264 states and 23819 transitions. Word has length 135 [2022-12-14 06:28:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:53,047 INFO L495 AbstractCegarLoop]: Abstraction has 16264 states and 23819 transitions. [2022-12-14 06:28:53,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:28:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 16264 states and 23819 transitions. [2022-12-14 06:28:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 06:28:53,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:53,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 06:28:53,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:28:53,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1750673445, now seen corresponding path program 1 times [2022-12-14 06:28:53,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:53,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155395645] [2022-12-14 06:28:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:53,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 06:28:53,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:53,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155395645] [2022-12-14 06:28:53,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155395645] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:53,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:28:53,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:28:53,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768973663] [2022-12-14 06:28:53,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:53,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:28:53,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:53,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:28:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:28:53,153 INFO L87 Difference]: Start difference. First operand 16264 states and 23819 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:28:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:54,088 INFO L93 Difference]: Finished difference Result 48205 states and 71312 transitions. [2022-12-14 06:28:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:28:54,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 135 [2022-12-14 06:28:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:54,166 INFO L225 Difference]: With dead ends: 48205 [2022-12-14 06:28:54,166 INFO L226 Difference]: Without dead ends: 31946 [2022-12-14 06:28:54,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:28:54,198 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 166 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:54,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 342 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:28:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31946 states. [2022-12-14 06:28:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31946 to 31752. [2022-12-14 06:28:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31752 states, 26499 states have (on average 1.468545982867278) internal successors, (38915), 26628 states have internal predecessors, (38915), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-12-14 06:28:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 46091 transitions. [2022-12-14 06:28:55,402 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 46091 transitions. Word has length 135 [2022-12-14 06:28:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:55,402 INFO L495 AbstractCegarLoop]: Abstraction has 31752 states and 46091 transitions. [2022-12-14 06:28:55,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:28:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 46091 transitions. [2022-12-14 06:28:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 06:28:55,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:55,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 06:28:55,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:28:55,481 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:55,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1232488171, now seen corresponding path program 1 times [2022-12-14 06:28:55,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:55,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699667468] [2022-12-14 06:28:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 06:28:55,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:55,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699667468] [2022-12-14 06:28:55,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699667468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:28:55,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050473336] [2022-12-14 06:28:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:55,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:55,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:55,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:28:55,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:28:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:55,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:28:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:28:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:28:55,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:28:55,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050473336] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:55,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:28:55,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 06:28:55,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350292799] [2022-12-14 06:28:55,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:55,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:28:55,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:28:55,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:28:55,790 INFO L87 Difference]: Start difference. First operand 31752 states and 46091 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:28:56,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:56,856 INFO L93 Difference]: Finished difference Result 60492 states and 88781 transitions. [2022-12-14 06:28:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:28:56,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 155 [2022-12-14 06:28:56,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:56,971 INFO L225 Difference]: With dead ends: 60492 [2022-12-14 06:28:56,971 INFO L226 Difference]: Without dead ends: 44330 [2022-12-14 06:28:57,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:28:57,003 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 126 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:57,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 452 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:28:57,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44330 states. [2022-12-14 06:28:58,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44330 to 38312. [2022-12-14 06:28:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38312 states, 32675 states have (on average 1.5082785003825554) internal successors, (49283), 32804 states have internal predecessors, (49283), 3780 states have call successors, (3780), 1856 states have call predecessors, (3780), 1856 states have return successors, (3780), 3652 states have call predecessors, (3780), 3780 states have call successors, (3780) [2022-12-14 06:28:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38312 states to 38312 states and 56843 transitions. [2022-12-14 06:28:58,217 INFO L78 Accepts]: Start accepts. Automaton has 38312 states and 56843 transitions. Word has length 155 [2022-12-14 06:28:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:58,217 INFO L495 AbstractCegarLoop]: Abstraction has 38312 states and 56843 transitions. [2022-12-14 06:28:58,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:28:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 38312 states and 56843 transitions. [2022-12-14 06:28:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 06:28:58,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:58,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 06:28:58,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:28:58,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:28:58,478 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:58,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1349954682, now seen corresponding path program 2 times [2022-12-14 06:28:58,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:58,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133864457] [2022-12-14 06:28:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:58,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 06:28:58,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:58,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133864457] [2022-12-14 06:28:58,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133864457] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:28:58,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591406976] [2022-12-14 06:28:58,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:28:58,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:58,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:58,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:28:58,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f87ba15-e252-4b39-8d2c-2ac432ded718/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:28:59,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:28:59,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:28:59,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 06:28:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:28:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 76 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:28:59,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:28:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 52 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:28:59,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591406976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:28:59,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574867768] [2022-12-14 06:28:59,731 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-12-14 06:28:59,731 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:28:59,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:28:59,739 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:28:59,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:31:50,527 WARN L233 SmtUtils]: Spent 6.90s on a formula simplification that was a NOOP. DAG size: 495 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 06:31:55,773 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 152 for LOIs [2022-12-14 06:31:55,820 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2022-12-14 06:31:56,720 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 65536 conjuctions. This might take some time...