./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur --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 851dc7d49dcc9fde277beeb190c3ab252014728a3bd4281f423bffd927fb4430 --- 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-38b53e6 [2022-11-25 22:25:19,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:25:19,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:25:19,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:25:19,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:25:19,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:25:19,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:25:19,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:25:19,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:25:19,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:25:19,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:25:19,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:25:19,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:25:19,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:25:19,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:25:19,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:25:19,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:25:19,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:25:19,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:25:19,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:25:19,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:25:19,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:25:19,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:25:19,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:25:19,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:25:19,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:25:19,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:25:19,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:25:19,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:25:19,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:25:19,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:25:19,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:25:19,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:25:19,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:25:19,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:25:19,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:25:19,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:25:19,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:25:19,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:25:19,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:25:19,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:25:19,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:25:19,284 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:25:19,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:25:19,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:25:19,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:25:19,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:25:19,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:25:19,290 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:25:19,290 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:25:19,291 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:25:19,291 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:25:19,292 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:25:19,292 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:25:19,292 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:25:19,293 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:25:19,293 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:25:19,293 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:25:19,293 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:25:19,294 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:25:19,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:25:19,295 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:25:19,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:25:19,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:25:19,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:25:19,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:25:19,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:25:19,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:25:19,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:25:19,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:25:19,298 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:25:19,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:25:19,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:25:19,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:25:19,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:25:19,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:25:19,299 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:25:19,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:25:19,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:25:19,300 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:25:19,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:25:19,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:25:19,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:25:19,301 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_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 851dc7d49dcc9fde277beeb190c3ab252014728a3bd4281f423bffd927fb4430 [2022-11-25 22:25:19,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:25:19,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:25:19,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:25:19,607 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:25:19,608 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:25:19,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-25 22:25:22,620 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:25:22,892 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:25:22,895 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-25 22:25:22,905 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/data/079c2ca2e/72e343db42f8480ebc5c1e5a6e1746d3/FLAG45440b9e1 [2022-11-25 22:25:22,925 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/data/079c2ca2e/72e343db42f8480ebc5c1e5a6e1746d3 [2022-11-25 22:25:22,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:25:22,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:25:22,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:25:22,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:25:22,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:25:22,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:25:22" (1/1) ... [2022-11-25 22:25:22,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fd90ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:22, skipping insertion in model container [2022-11-25 22:25:22,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:25:22" (1/1) ... [2022-11-25 22:25:22,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:25:23,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:25:23,281 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_125645ac-aef9-49f6-be6a-c0c793734b7e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2022-11-25 22:25:23,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:25:23,381 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:25:23,456 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_125645ac-aef9-49f6-be6a-c0c793734b7e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2022-11-25 22:25:23,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:25:23,563 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:25:23,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23 WrapperNode [2022-11-25 22:25:23,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:25:23,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:25:23,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:25:23,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:25:23,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (1/1) ... [2022-11-25 22:25:23,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (1/1) ... [2022-11-25 22:25:23,681 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 946 [2022-11-25 22:25:23,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:25:23,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:25:23,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:25:23,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:25:23,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (1/1) ... [2022-11-25 22:25:23,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (1/1) ... [2022-11-25 22:25:23,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (1/1) ... [2022-11-25 22:25:23,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (1/1) ... [2022-11-25 22:25:23,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (1/1) ... [2022-11-25 22:25:23,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (1/1) ... [2022-11-25 22:25:23,755 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (1/1) ... [2022-11-25 22:25:23,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (1/1) ... [2022-11-25 22:25:23,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:25:23,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:25:23,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:25:23,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:25:23,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (1/1) ... [2022-11-25 22:25:23,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:25:23,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:23,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:25:23,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_125645ac-aef9-49f6-be6a-c0c793734b7e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:25:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:25:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:25:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:25:23,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:25:24,111 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:25:24,113 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:25:25,010 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:25:25,295 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:25:25,295 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 22:25:25,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:25:25 BoogieIcfgContainer [2022-11-25 22:25:25,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:25:25,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:25:25,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:25:25,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:25:25,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:25:22" (1/3) ... [2022-11-25 22:25:25,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cec131a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:25:25, skipping insertion in model container [2022-11-25 22:25:25,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:23" (2/3) ... [2022-11-25 22:25:25,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cec131a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:25:25, skipping insertion in model container [2022-11-25 22:25:25,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:25:25" (3/3) ... [2022-11-25 22:25:25,316 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-25 22:25:25,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:25:25,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:25:25,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:25:25,411 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;@44c79278, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:25:25,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:25:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 1.7098445595854923) internal successors, (330), 194 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 22:25:25,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:25,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:25,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:25,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:25,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1772722671, now seen corresponding path program 1 times [2022-11-25 22:25:25,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:25,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562446374] [2022-11-25 22:25:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:25,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:26,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:26,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562446374] [2022-11-25 22:25:26,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562446374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:25:26,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:25:26,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:25:26,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365707953] [2022-11-25 22:25:26,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:25:26,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:25:26,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:26,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:25:26,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:25:26,455 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 1.7098445595854923) internal successors, (330), 194 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:27,043 INFO L93 Difference]: Finished difference Result 770 states and 1237 transitions. [2022-11-25 22:25:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:25:27,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-25 22:25:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:27,061 INFO L225 Difference]: With dead ends: 770 [2022-11-25 22:25:27,061 INFO L226 Difference]: Without dead ends: 659 [2022-11-25 22:25:27,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:25:27,068 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 1808 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1808 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:27,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1808 Valid, 1386 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:25:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-11-25 22:25:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 649. [2022-11-25 22:25:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.4243827160493827) internal successors, (923), 648 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 923 transitions. [2022-11-25 22:25:27,265 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 923 transitions. Word has length 81 [2022-11-25 22:25:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:27,265 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 923 transitions. [2022-11-25 22:25:27,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 923 transitions. [2022-11-25 22:25:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 22:25:27,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:27,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:27,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:25:27,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:27,271 INFO L85 PathProgramCache]: Analyzing trace with hash 230661414, now seen corresponding path program 1 times [2022-11-25 22:25:27,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:27,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117002104] [2022-11-25 22:25:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:27,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:27,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:27,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117002104] [2022-11-25 22:25:27,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117002104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:25:27,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:25:27,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:25:27,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170739433] [2022-11-25 22:25:27,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:25:27,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:25:27,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:25:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:25:27,543 INFO L87 Difference]: Start difference. First operand 649 states and 923 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:28,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:28,067 INFO L93 Difference]: Finished difference Result 1580 states and 2302 transitions. [2022-11-25 22:25:28,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:25:28,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-25 22:25:28,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:28,071 INFO L225 Difference]: With dead ends: 1580 [2022-11-25 22:25:28,071 INFO L226 Difference]: Without dead ends: 981 [2022-11-25 22:25:28,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:25:28,075 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 711 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:28,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 263 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:25:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-11-25 22:25:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 979. [2022-11-25 22:25:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 1.4519427402862985) internal successors, (1420), 978 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1420 transitions. [2022-11-25 22:25:28,263 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1420 transitions. Word has length 82 [2022-11-25 22:25:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:28,264 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 1420 transitions. [2022-11-25 22:25:28,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1420 transitions. [2022-11-25 22:25:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 22:25:28,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:28,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:28,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:25:28,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash 360098538, now seen corresponding path program 1 times [2022-11-25 22:25:28,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:28,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52854060] [2022-11-25 22:25:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:28,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:28,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:28,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52854060] [2022-11-25 22:25:28,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52854060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:25:28,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:25:28,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:25:28,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23082283] [2022-11-25 22:25:28,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:25:28,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:25:28,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:28,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:25:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:25:28,434 INFO L87 Difference]: Start difference. First operand 979 states and 1420 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:29,081 INFO L93 Difference]: Finished difference Result 2518 states and 3729 transitions. [2022-11-25 22:25:29,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:25:29,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-25 22:25:29,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:29,088 INFO L225 Difference]: With dead ends: 2518 [2022-11-25 22:25:29,088 INFO L226 Difference]: Without dead ends: 1695 [2022-11-25 22:25:29,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:25:29,091 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 661 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:29,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 295 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:25:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-11-25 22:25:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1693. [2022-11-25 22:25:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 1.4734042553191489) internal successors, (2493), 1692 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2493 transitions. [2022-11-25 22:25:29,436 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2493 transitions. Word has length 82 [2022-11-25 22:25:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:29,438 INFO L495 AbstractCegarLoop]: Abstraction has 1693 states and 2493 transitions. [2022-11-25 22:25:29,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2493 transitions. [2022-11-25 22:25:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 22:25:29,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:29,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:29,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:25:29,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:29,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1311537989, now seen corresponding path program 1 times [2022-11-25 22:25:29,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:29,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730224329] [2022-11-25 22:25:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:29,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:29,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:29,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730224329] [2022-11-25 22:25:29,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730224329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:25:29,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:25:29,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:25:29,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653819651] [2022-11-25 22:25:29,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:25:29,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:25:29,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:29,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:25:29,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:25:29,690 INFO L87 Difference]: Start difference. First operand 1693 states and 2493 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:30,538 INFO L93 Difference]: Finished difference Result 4619 states and 6903 transitions. [2022-11-25 22:25:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:25:30,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-25 22:25:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:30,550 INFO L225 Difference]: With dead ends: 4619 [2022-11-25 22:25:30,550 INFO L226 Difference]: Without dead ends: 3123 [2022-11-25 22:25:30,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:25:30,563 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 679 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:30,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 296 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:25:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2022-11-25 22:25:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3121. [2022-11-25 22:25:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3120 states have (on average 1.485897435897436) internal successors, (4636), 3120 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4636 transitions. [2022-11-25 22:25:31,134 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4636 transitions. Word has length 82 [2022-11-25 22:25:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:31,134 INFO L495 AbstractCegarLoop]: Abstraction has 3121 states and 4636 transitions. [2022-11-25 22:25:31,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4636 transitions. [2022-11-25 22:25:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 22:25:31,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:31,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:31,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:25:31,136 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:31,137 INFO L85 PathProgramCache]: Analyzing trace with hash -691394855, now seen corresponding path program 1 times [2022-11-25 22:25:31,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:31,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174747851] [2022-11-25 22:25:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:31,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:31,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:31,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174747851] [2022-11-25 22:25:31,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174747851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:25:31,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:25:31,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:25:31,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413493037] [2022-11-25 22:25:31,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:25:31,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:25:31,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:31,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:25:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:25:31,278 INFO L87 Difference]: Start difference. First operand 3121 states and 4636 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:32,497 INFO L93 Difference]: Finished difference Result 8981 states and 13442 transitions. [2022-11-25 22:25:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:25:32,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-25 22:25:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:32,517 INFO L225 Difference]: With dead ends: 8981 [2022-11-25 22:25:32,518 INFO L226 Difference]: Without dead ends: 5979 [2022-11-25 22:25:32,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:25:32,522 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 660 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:32,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 287 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:25:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5979 states. [2022-11-25 22:25:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5979 to 5977. [2022-11-25 22:25:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5977 states, 5976 states have (on average 1.4877844712182062) internal successors, (8891), 5976 states have internal predecessors, (8891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5977 states to 5977 states and 8891 transitions. [2022-11-25 22:25:33,475 INFO L78 Accepts]: Start accepts. Automaton has 5977 states and 8891 transitions. Word has length 82 [2022-11-25 22:25:33,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:33,476 INFO L495 AbstractCegarLoop]: Abstraction has 5977 states and 8891 transitions. [2022-11-25 22:25:33,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:33,476 INFO L276 IsEmpty]: Start isEmpty. Operand 5977 states and 8891 transitions. [2022-11-25 22:25:33,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 22:25:33,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:33,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:33,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:25:33,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:33,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:33,478 INFO L85 PathProgramCache]: Analyzing trace with hash -911705976, now seen corresponding path program 1 times [2022-11-25 22:25:33,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:33,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645480144] [2022-11-25 22:25:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:33,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:33,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:33,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645480144] [2022-11-25 22:25:33,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645480144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:25:33,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:25:33,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:25:33,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301298661] [2022-11-25 22:25:33,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:25:33,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:25:33,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:33,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:25:33,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:25:33,656 INFO L87 Difference]: Start difference. First operand 5977 states and 8891 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:35,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:35,586 INFO L93 Difference]: Finished difference Result 17579 states and 26255 transitions. [2022-11-25 22:25:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:25:35,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-25 22:25:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:35,632 INFO L225 Difference]: With dead ends: 17579 [2022-11-25 22:25:35,632 INFO L226 Difference]: Without dead ends: 11691 [2022-11-25 22:25:35,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:25:35,644 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 665 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:35,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 279 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:25:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2022-11-25 22:25:37,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 11689. [2022-11-25 22:25:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11689 states, 11688 states have (on average 1.4828028747433264) internal successors, (17331), 11688 states have internal predecessors, (17331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11689 states to 11689 states and 17331 transitions. [2022-11-25 22:25:37,205 INFO L78 Accepts]: Start accepts. Automaton has 11689 states and 17331 transitions. Word has length 82 [2022-11-25 22:25:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:37,206 INFO L495 AbstractCegarLoop]: Abstraction has 11689 states and 17331 transitions. [2022-11-25 22:25:37,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 11689 states and 17331 transitions. [2022-11-25 22:25:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 22:25:37,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:37,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:37,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:25:37,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:37,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1677467639, now seen corresponding path program 1 times [2022-11-25 22:25:37,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:37,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102591537] [2022-11-25 22:25:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:37,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:37,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102591537] [2022-11-25 22:25:37,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102591537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:25:37,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:25:37,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:25:37,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566138675] [2022-11-25 22:25:37,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:25:37,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:25:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:37,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:25:37,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:25:37,359 INFO L87 Difference]: Start difference. First operand 11689 states and 17331 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:40,480 INFO L93 Difference]: Finished difference Result 34738 states and 51612 transitions. [2022-11-25 22:25:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:25:40,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-25 22:25:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:40,544 INFO L225 Difference]: With dead ends: 34738 [2022-11-25 22:25:40,544 INFO L226 Difference]: Without dead ends: 23115 [2022-11-25 22:25:40,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:25:40,560 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 670 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:40,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 271 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:25:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23115 states. [2022-11-25 22:25:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23115 to 23113. [2022-11-25 22:25:43,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23113 states, 23112 states have (on average 1.4731741086881274) internal successors, (34048), 23112 states have internal predecessors, (34048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23113 states to 23113 states and 34048 transitions. [2022-11-25 22:25:44,041 INFO L78 Accepts]: Start accepts. Automaton has 23113 states and 34048 transitions. Word has length 82 [2022-11-25 22:25:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:44,042 INFO L495 AbstractCegarLoop]: Abstraction has 23113 states and 34048 transitions. [2022-11-25 22:25:44,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 23113 states and 34048 transitions. [2022-11-25 22:25:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 22:25:44,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:44,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:44,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:25:44,045 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:44,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1203805347, now seen corresponding path program 1 times [2022-11-25 22:25:44,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:44,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690117346] [2022-11-25 22:25:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:44,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:47,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:47,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690117346] [2022-11-25 22:25:47,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690117346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:25:47,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:25:47,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-25 22:25:47,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934586864] [2022-11-25 22:25:47,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:25:47,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 22:25:47,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:47,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 22:25:47,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-11-25 22:25:47,903 INFO L87 Difference]: Start difference. First operand 23113 states and 34048 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:01,301 INFO L93 Difference]: Finished difference Result 60984 states and 89704 transitions. [2022-11-25 22:26:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:26:01,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-25 22:26:01,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:01,464 INFO L225 Difference]: With dead ends: 60984 [2022-11-25 22:26:01,465 INFO L226 Difference]: Without dead ends: 60982 [2022-11-25 22:26:01,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 22:26:01,483 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 1977 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 2833 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1977 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 2845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:01,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1977 Valid, 2594 Invalid, 2845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2833 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 22:26:01,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60982 states. [2022-11-25 22:26:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60982 to 45989. [2022-11-25 22:26:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45989 states, 45988 states have (on average 1.4672740714969121) internal successors, (67477), 45988 states have internal predecessors, (67477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45989 states to 45989 states and 67477 transitions. [2022-11-25 22:26:09,706 INFO L78 Accepts]: Start accepts. Automaton has 45989 states and 67477 transitions. Word has length 83 [2022-11-25 22:26:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:09,707 INFO L495 AbstractCegarLoop]: Abstraction has 45989 states and 67477 transitions. [2022-11-25 22:26:09,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:09,707 INFO L276 IsEmpty]: Start isEmpty. Operand 45989 states and 67477 transitions. [2022-11-25 22:26:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 22:26:09,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:09,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:09,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:26:09,709 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash -249302051, now seen corresponding path program 1 times [2022-11-25 22:26:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:09,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261027298] [2022-11-25 22:26:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:09,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:26:11,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:11,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261027298] [2022-11-25 22:26:11,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261027298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:26:11,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:26:11,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-25 22:26:11,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657429546] [2022-11-25 22:26:11,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:26:11,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:26:11,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:11,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:26:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:26:11,692 INFO L87 Difference]: Start difference. First operand 45989 states and 67477 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:21,553 INFO L93 Difference]: Finished difference Result 58835 states and 86115 transitions. [2022-11-25 22:26:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 22:26:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-25 22:26:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:21,671 INFO L225 Difference]: With dead ends: 58835 [2022-11-25 22:26:21,671 INFO L226 Difference]: Without dead ends: 54033 [2022-11-25 22:26:21,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2022-11-25 22:26:21,691 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 1151 mSDsluCounter, 3486 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 3900 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:21,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 3900 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 22:26:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54033 states. [2022-11-25 22:26:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54033 to 50437. [2022-11-25 22:26:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50437 states, 50436 states have (on average 1.4652629074470616) internal successors, (73902), 50436 states have internal predecessors, (73902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50437 states to 50437 states and 73902 transitions. [2022-11-25 22:26:29,438 INFO L78 Accepts]: Start accepts. Automaton has 50437 states and 73902 transitions. Word has length 83 [2022-11-25 22:26:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:29,439 INFO L495 AbstractCegarLoop]: Abstraction has 50437 states and 73902 transitions. [2022-11-25 22:26:29,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 50437 states and 73902 transitions. [2022-11-25 22:26:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 22:26:29,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:29,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:29,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 22:26:29,442 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:29,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash 941319165, now seen corresponding path program 1 times [2022-11-25 22:26:29,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:29,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427836178] [2022-11-25 22:26:29,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:29,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat