./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW --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 686ecb1010b71c794fc4e873862aa984c2fdfbe32a68bd8271c0851d6420f945 --- 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-4e7fbc6 [2022-11-23 15:18:37,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:18:37,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:18:37,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:18:37,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:18:37,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:18:37,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:18:37,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:18:37,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:18:37,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:18:37,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:18:37,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:18:37,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:18:37,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:18:37,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:18:37,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:18:37,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:18:37,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:18:37,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:18:37,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:18:37,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:18:37,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:18:37,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:18:37,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:18:37,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:18:37,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:18:37,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:18:37,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:18:37,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:18:37,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:18:37,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:18:37,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:18:37,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:18:37,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:18:37,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:18:37,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:18:37,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:18:37,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:18:37,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:18:37,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:18:37,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:18:37,187 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:18:37,211 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:18:37,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:18:37,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:18:37,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:18:37,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:18:37,213 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:18:37,213 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:18:37,213 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:18:37,214 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:18:37,214 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:18:37,214 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:18:37,214 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:18:37,215 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:18:37,215 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:18:37,215 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:18:37,216 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:18:37,216 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:18:37,216 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:18:37,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:18:37,217 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:18:37,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:18:37,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:18:37,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:18:37,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:18:37,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:18:37,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:18:37,219 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:18:37,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:18:37,220 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:18:37,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:18:37,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:18:37,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:18:37,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:18:37,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:18:37,221 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:18:37,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:18:37,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:18:37,222 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:18:37,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:18:37,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:18:37,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:18:37,223 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_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 686ecb1010b71c794fc4e873862aa984c2fdfbe32a68bd8271c0851d6420f945 [2022-11-23 15:18:37,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:18:37,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:18:37,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:18:37,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:18:37,564 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:18:37,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c [2022-11-23 15:18:40,524 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:18:40,832 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:18:40,833 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c [2022-11-23 15:18:40,849 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/data/8fd97ccf4/d1199aade3cf49b391a6aad459752b48/FLAG3f9eb1240 [2022-11-23 15:18:40,882 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/data/8fd97ccf4/d1199aade3cf49b391a6aad459752b48 [2022-11-23 15:18:40,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:18:40,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:18:40,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:18:40,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:18:40,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:18:40,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:18:40" (1/1) ... [2022-11-23 15:18:40,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38311683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:40, skipping insertion in model container [2022-11-23 15:18:40,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:18:40" (1/1) ... [2022-11-23 15:18:40,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:18:40,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:18:41,110 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_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c[913,926] [2022-11-23 15:18:41,158 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_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c[5977,5990] [2022-11-23 15:18:41,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:18:41,253 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:18:41,265 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_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c[913,926] [2022-11-23 15:18:41,282 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_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c[5977,5990] [2022-11-23 15:18:41,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:18:41,350 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:18:41,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41 WrapperNode [2022-11-23 15:18:41,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:18:41,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:18:41,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:18:41,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:18:41,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (1/1) ... [2022-11-23 15:18:41,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (1/1) ... [2022-11-23 15:18:41,422 INFO L138 Inliner]: procedures = 62, calls = 69, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 765 [2022-11-23 15:18:41,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:18:41,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:18:41,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:18:41,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:18:41,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (1/1) ... [2022-11-23 15:18:41,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (1/1) ... [2022-11-23 15:18:41,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (1/1) ... [2022-11-23 15:18:41,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (1/1) ... [2022-11-23 15:18:41,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (1/1) ... [2022-11-23 15:18:41,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (1/1) ... [2022-11-23 15:18:41,467 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (1/1) ... [2022-11-23 15:18:41,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (1/1) ... [2022-11-23 15:18:41,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:18:41,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:18:41,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:18:41,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:18:41,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (1/1) ... [2022-11-23 15:18:41,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:18:41,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:18:41,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:18:41,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:18:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:18:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 15:18:41,571 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 15:18:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-23 15:18:41,572 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-23 15:18:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 15:18:41,572 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 15:18:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 15:18:41,572 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 15:18:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 15:18:41,573 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 15:18:41,573 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 15:18:41,573 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 15:18:41,573 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 15:18:41,574 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 15:18:41,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:18:41,574 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 15:18:41,574 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 15:18:41,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:18:41,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:18:41,575 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 15:18:41,575 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 15:18:41,757 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:18:41,759 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:18:42,643 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:18:43,015 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:18:43,015 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-23 15:18:43,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:18:43 BoogieIcfgContainer [2022-11-23 15:18:43,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:18:43,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:18:43,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:18:43,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:18:43,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:18:40" (1/3) ... [2022-11-23 15:18:43,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aacb3c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:18:43, skipping insertion in model container [2022-11-23 15:18:43,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:18:41" (2/3) ... [2022-11-23 15:18:43,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aacb3c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:18:43, skipping insertion in model container [2022-11-23 15:18:43,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:18:43" (3/3) ... [2022-11-23 15:18:43,034 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.07.cil-1.c [2022-11-23 15:18:43,054 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:18:43,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 15:18:43,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:18:43,136 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;@7cdccea6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:18:43,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 15:18:43,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 184 states, 145 states have (on average 1.5517241379310345) internal successors, (225), 150 states have internal predecessors, (225), 27 states have call successors, (27), 9 states have call predecessors, (27), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-23 15:18:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:18:43,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:43,150 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] [2022-11-23 15:18:43,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash 143952117, now seen corresponding path program 1 times [2022-11-23 15:18:43,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:43,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224924251] [2022-11-23 15:18:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:43,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:18:43,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:43,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224924251] [2022-11-23 15:18:43,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224924251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:43,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:43,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:18:43,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298819043] [2022-11-23 15:18:43,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:43,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:18:43,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:43,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:18:43,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:18:43,606 INFO L87 Difference]: Start difference. First operand has 184 states, 145 states have (on average 1.5517241379310345) internal successors, (225), 150 states have internal predecessors, (225), 27 states have call successors, (27), 9 states have call predecessors, (27), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:18:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:43,776 INFO L93 Difference]: Finished difference Result 401 states and 606 transitions. [2022-11-23 15:18:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:18:43,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-23 15:18:43,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:43,789 INFO L225 Difference]: With dead ends: 401 [2022-11-23 15:18:43,789 INFO L226 Difference]: Without dead ends: 217 [2022-11-23 15:18:43,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:18:43,796 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 246 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:43,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 293 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:18:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-23 15:18:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 213. [2022-11-23 15:18:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 171 states have (on average 1.4736842105263157) internal successors, (252), 174 states have internal predecessors, (252), 30 states have call successors, (30), 11 states have call predecessors, (30), 10 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-23 15:18:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 310 transitions. [2022-11-23 15:18:43,858 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 310 transitions. Word has length 28 [2022-11-23 15:18:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:43,859 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 310 transitions. [2022-11-23 15:18:43,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:18:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 310 transitions. [2022-11-23 15:18:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 15:18:43,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:43,861 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] [2022-11-23 15:18:43,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:18:43,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:43,863 INFO L85 PathProgramCache]: Analyzing trace with hash -392171399, now seen corresponding path program 1 times [2022-11-23 15:18:43,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:43,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914065135] [2022-11-23 15:18:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:43,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:18:43,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:43,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914065135] [2022-11-23 15:18:43,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914065135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:43,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:43,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:18:43,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612241533] [2022-11-23 15:18:43,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:43,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:18:43,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:43,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:18:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:18:43,930 INFO L87 Difference]: Start difference. First operand 213 states and 310 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:18:44,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:44,057 INFO L93 Difference]: Finished difference Result 369 states and 527 transitions. [2022-11-23 15:18:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:18:44,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-23 15:18:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:44,060 INFO L225 Difference]: With dead ends: 369 [2022-11-23 15:18:44,060 INFO L226 Difference]: Without dead ends: 288 [2022-11-23 15:18:44,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:18:44,063 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 244 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:44,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 278 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:18:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-23 15:18:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2022-11-23 15:18:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 231 states have (on average 1.4415584415584415) internal successors, (333), 234 states have internal predecessors, (333), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-23 15:18:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 405 transitions. [2022-11-23 15:18:44,091 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 405 transitions. Word has length 29 [2022-11-23 15:18:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:44,092 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 405 transitions. [2022-11-23 15:18:44,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:18:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 405 transitions. [2022-11-23 15:18:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 15:18:44,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:44,094 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] [2022-11-23 15:18:44,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:18:44,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:44,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:44,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1766407323, now seen corresponding path program 1 times [2022-11-23 15:18:44,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:44,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579719223] [2022-11-23 15:18:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:44,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:18:44,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:44,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579719223] [2022-11-23 15:18:44,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579719223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:44,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:44,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:18:44,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888822132] [2022-11-23 15:18:44,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:44,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:18:44,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:44,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:18:44,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:18:44,158 INFO L87 Difference]: Start difference. First operand 284 states and 405 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:18:44,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:44,285 INFO L93 Difference]: Finished difference Result 524 states and 733 transitions. [2022-11-23 15:18:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:18:44,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-23 15:18:44,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:44,289 INFO L225 Difference]: With dead ends: 524 [2022-11-23 15:18:44,289 INFO L226 Difference]: Without dead ends: 372 [2022-11-23 15:18:44,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:18:44,291 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 46 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:44,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 441 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:18:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-11-23 15:18:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 358. [2022-11-23 15:18:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 294 states have (on average 1.4217687074829932) internal successors, (418), 299 states have internal predecessors, (418), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-23 15:18:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 502 transitions. [2022-11-23 15:18:44,324 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 502 transitions. Word has length 30 [2022-11-23 15:18:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:44,324 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 502 transitions. [2022-11-23 15:18:44,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:18:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 502 transitions. [2022-11-23 15:18:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 15:18:44,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:44,327 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:44,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:18:44,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash 658318928, now seen corresponding path program 1 times [2022-11-23 15:18:44,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:44,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603941883] [2022-11-23 15:18:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:44,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:18:44,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:44,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603941883] [2022-11-23 15:18:44,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603941883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:44,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:44,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:18:44,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6611817] [2022-11-23 15:18:44,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:44,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:18:44,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:18:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:18:44,402 INFO L87 Difference]: Start difference. First operand 358 states and 502 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:18:44,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:44,518 INFO L93 Difference]: Finished difference Result 521 states and 720 transitions. [2022-11-23 15:18:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:18:44,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-11-23 15:18:44,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:44,522 INFO L225 Difference]: With dead ends: 521 [2022-11-23 15:18:44,523 INFO L226 Difference]: Without dead ends: 363 [2022-11-23 15:18:44,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:18:44,524 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 32 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:44,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 473 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:18:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-23 15:18:44,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2022-11-23 15:18:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 288 states have (on average 1.4027777777777777) internal successors, (404), 293 states have internal predecessors, (404), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-23 15:18:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 488 transitions. [2022-11-23 15:18:44,579 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 488 transitions. Word has length 43 [2022-11-23 15:18:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:44,579 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 488 transitions. [2022-11-23 15:18:44,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:18:44,580 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 488 transitions. [2022-11-23 15:18:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 15:18:44,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:44,591 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:44,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:18:44,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:44,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2002289158, now seen corresponding path program 1 times [2022-11-23 15:18:44,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:44,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370776972] [2022-11-23 15:18:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:44,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:18:44,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:44,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370776972] [2022-11-23 15:18:44,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370776972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:44,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:44,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:18:44,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53320245] [2022-11-23 15:18:44,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:44,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:18:44,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:44,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:18:44,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:18:44,709 INFO L87 Difference]: Start difference. First operand 352 states and 488 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:18:44,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:44,859 INFO L93 Difference]: Finished difference Result 601 states and 812 transitions. [2022-11-23 15:18:44,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:18:44,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-11-23 15:18:44,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:44,863 INFO L225 Difference]: With dead ends: 601 [2022-11-23 15:18:44,863 INFO L226 Difference]: Without dead ends: 398 [2022-11-23 15:18:44,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:18:44,869 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 230 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:44,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 276 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:18:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-23 15:18:44,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2022-11-23 15:18:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 327 states have (on average 1.3669724770642202) internal successors, (447), 332 states have internal predecessors, (447), 47 states have call successors, (47), 23 states have call predecessors, (47), 22 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-23 15:18:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 539 transitions. [2022-11-23 15:18:44,913 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 539 transitions. Word has length 46 [2022-11-23 15:18:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:44,914 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 539 transitions. [2022-11-23 15:18:44,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:18:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 539 transitions. [2022-11-23 15:18:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 15:18:44,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:44,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:44,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:18:44,918 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash -550665784, now seen corresponding path program 1 times [2022-11-23 15:18:44,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:44,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374863243] [2022-11-23 15:18:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:44,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:18:45,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374863243] [2022-11-23 15:18:45,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374863243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:45,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:45,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:18:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634733099] [2022-11-23 15:18:45,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:45,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:18:45,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:18:45,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:18:45,091 INFO L87 Difference]: Start difference. First operand 398 states and 539 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:18:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:45,336 INFO L93 Difference]: Finished difference Result 438 states and 586 transitions. [2022-11-23 15:18:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:18:45,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-11-23 15:18:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:45,340 INFO L225 Difference]: With dead ends: 438 [2022-11-23 15:18:45,341 INFO L226 Difference]: Without dead ends: 435 [2022-11-23 15:18:45,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:18:45,346 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 424 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:45,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 274 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:18:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-23 15:18:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 397. [2022-11-23 15:18:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 327 states have (on average 1.3608562691131498) internal successors, (445), 331 states have internal predecessors, (445), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-23 15:18:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 536 transitions. [2022-11-23 15:18:45,395 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 536 transitions. Word has length 47 [2022-11-23 15:18:45,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:45,396 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 536 transitions. [2022-11-23 15:18:45,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:18:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 536 transitions. [2022-11-23 15:18:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 15:18:45,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:45,399 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:45,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:18:45,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:45,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:45,400 INFO L85 PathProgramCache]: Analyzing trace with hash 108203593, now seen corresponding path program 1 times [2022-11-23 15:18:45,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:45,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909453550] [2022-11-23 15:18:45,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:45,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:18:45,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:45,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909453550] [2022-11-23 15:18:45,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909453550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:18:45,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127994812] [2022-11-23 15:18:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:45,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:18:45,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:18:45,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:18:45,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:18:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:45,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:18:45,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:18:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:18:46,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:18:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:18:46,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127994812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:18:46,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857177791] [2022-11-23 15:18:46,287 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-23 15:18:46,288 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:18:46,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:18:46,297 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:18:46,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:18:50,481 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 135 for LOIs [2022-11-23 15:18:50,501 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 150 for LOIs [2022-11-23 15:18:50,524 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 316 for LOIs [2022-11-23 15:18:52,526 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:19:16,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7482#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (<= ~p_num_write~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:19:16,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:19:16,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:19:16,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 15:19:16,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912968092] [2022-11-23 15:19:16,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:19:16,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:19:16,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:16,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:19:16,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 15:19:16,559 INFO L87 Difference]: Start difference. First operand 397 states and 536 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 15:19:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:16,975 INFO L93 Difference]: Finished difference Result 840 states and 1104 transitions. [2022-11-23 15:19:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:19:16,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-23 15:19:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:16,980 INFO L225 Difference]: With dead ends: 840 [2022-11-23 15:19:16,980 INFO L226 Difference]: Without dead ends: 837 [2022-11-23 15:19:16,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 15:19:16,982 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 582 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:16,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 773 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:19:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-23 15:19:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 606. [2022-11-23 15:19:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 504 states have (on average 1.3452380952380953) internal successors, (678), 510 states have internal predecessors, (678), 65 states have call successors, (65), 36 states have call predecessors, (65), 35 states have return successors, (64), 60 states have call predecessors, (64), 64 states have call successors, (64) [2022-11-23 15:19:17,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 807 transitions. [2022-11-23 15:19:17,034 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 807 transitions. Word has length 48 [2022-11-23 15:19:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:17,034 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 807 transitions. [2022-11-23 15:19:17,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 15:19:17,034 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 807 transitions. [2022-11-23 15:19:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-23 15:19:17,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:17,036 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] [2022-11-23 15:19:17,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:17,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:19:17,242 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:17,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1713020823, now seen corresponding path program 1 times [2022-11-23 15:19:17,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:17,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844554145] [2022-11-23 15:19:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:17,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:17,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:17,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844554145] [2022-11-23 15:19:17,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844554145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:17,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:17,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:19:17,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234628905] [2022-11-23 15:19:17,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:17,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:19:17,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:17,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:19:17,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:19:17,344 INFO L87 Difference]: Start difference. First operand 606 states and 807 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 15:19:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:17,670 INFO L93 Difference]: Finished difference Result 851 states and 1196 transitions. [2022-11-23 15:19:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:19:17,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-11-23 15:19:17,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:17,681 INFO L225 Difference]: With dead ends: 851 [2022-11-23 15:19:17,681 INFO L226 Difference]: Without dead ends: 725 [2022-11-23 15:19:17,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:19:17,683 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 403 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:17,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 631 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:19:17,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-11-23 15:19:17,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 724. [2022-11-23 15:19:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 599 states have (on average 1.3622704507512522) internal successors, (816), 606 states have internal predecessors, (816), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-23 15:19:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 979 transitions. [2022-11-23 15:19:17,740 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 979 transitions. Word has length 52 [2022-11-23 15:19:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:17,740 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 979 transitions. [2022-11-23 15:19:17,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 15:19:17,741 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 979 transitions. [2022-11-23 15:19:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 15:19:17,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:17,743 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:17,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:19:17,743 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:17,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1810836157, now seen corresponding path program 2 times [2022-11-23 15:19:17,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:17,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691130198] [2022-11-23 15:19:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:17,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 15:19:17,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:17,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691130198] [2022-11-23 15:19:17,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691130198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:17,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:17,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:19:17,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161617865] [2022-11-23 15:19:17,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:17,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:17,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:17,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:17,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:17,781 INFO L87 Difference]: Start difference. First operand 724 states and 979 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 15:19:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:17,903 INFO L93 Difference]: Finished difference Result 1054 states and 1412 transitions. [2022-11-23 15:19:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:17,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-11-23 15:19:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:17,907 INFO L225 Difference]: With dead ends: 1054 [2022-11-23 15:19:17,907 INFO L226 Difference]: Without dead ends: 666 [2022-11-23 15:19:17,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:17,910 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 242 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:17,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 288 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-11-23 15:19:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 657. [2022-11-23 15:19:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 542 states have (on average 1.3560885608856088) internal successors, (735), 550 states have internal predecessors, (735), 76 states have call successors, (76), 38 states have call predecessors, (76), 37 states have return successors, (75), 69 states have call predecessors, (75), 75 states have call successors, (75) [2022-11-23 15:19:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 886 transitions. [2022-11-23 15:19:17,970 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 886 transitions. Word has length 61 [2022-11-23 15:19:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:17,975 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 886 transitions. [2022-11-23 15:19:17,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 15:19:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 886 transitions. [2022-11-23 15:19:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 15:19:17,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:17,979 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:17,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:19:17,979 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:17,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:17,980 INFO L85 PathProgramCache]: Analyzing trace with hash -266907575, now seen corresponding path program 1 times [2022-11-23 15:19:17,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:17,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279573364] [2022-11-23 15:19:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:17,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:19:18,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:18,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279573364] [2022-11-23 15:19:18,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279573364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:18,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144168806] [2022-11-23 15:19:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:18,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:18,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:18,149 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:18,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:19:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:18,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:19:18,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:19:18,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:18,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144168806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:18,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:18,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 15:19:18,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934498958] [2022-11-23 15:19:18,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:18,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:18,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:18,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:18,318 INFO L87 Difference]: Start difference. First operand 657 states and 886 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 15:19:18,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:18,458 INFO L93 Difference]: Finished difference Result 784 states and 1045 transitions. [2022-11-23 15:19:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:18,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-11-23 15:19:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:18,461 INFO L225 Difference]: With dead ends: 784 [2022-11-23 15:19:18,461 INFO L226 Difference]: Without dead ends: 250 [2022-11-23 15:19:18,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:18,462 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 25 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:18,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 442 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-23 15:19:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-11-23 15:19:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 199 states have (on average 1.4723618090452262) internal successors, (293), 201 states have internal predecessors, (293), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-23 15:19:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 369 transitions. [2022-11-23 15:19:18,486 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 369 transitions. Word has length 73 [2022-11-23 15:19:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:18,487 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 369 transitions. [2022-11-23 15:19:18,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 15:19:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 369 transitions. [2022-11-23 15:19:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:19:18,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:18,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:18,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:18,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:19:18,695 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:18,695 INFO L85 PathProgramCache]: Analyzing trace with hash -604746939, now seen corresponding path program 1 times [2022-11-23 15:19:18,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:18,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029314523] [2022-11-23 15:19:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:18,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:19:18,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029314523] [2022-11-23 15:19:18,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029314523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815380167] [2022-11-23 15:19:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:18,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:18,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:18,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:18,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:19:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:19,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:19:19,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 15:19:19,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:19,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815380167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:19,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:19,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:19:19,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432863861] [2022-11-23 15:19:19,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:19,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:19,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:19,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:19,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:19,076 INFO L87 Difference]: Start difference. First operand 250 states and 369 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:19:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:19,204 INFO L93 Difference]: Finished difference Result 731 states and 1098 transitions. [2022-11-23 15:19:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:19,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-23 15:19:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:19,208 INFO L225 Difference]: With dead ends: 731 [2022-11-23 15:19:19,208 INFO L226 Difference]: Without dead ends: 487 [2022-11-23 15:19:19,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:19,210 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 162 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:19,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 353 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:19,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-23 15:19:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 483. [2022-11-23 15:19:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 388 states have (on average 1.4690721649484537) internal successors, (570), 391 states have internal predecessors, (570), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-23 15:19:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 710 transitions. [2022-11-23 15:19:19,281 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 710 transitions. Word has length 101 [2022-11-23 15:19:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:19,282 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 710 transitions. [2022-11-23 15:19:19,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:19:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 710 transitions. [2022-11-23 15:19:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:19:19,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:19,288 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:19,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:19,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:19,499 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2040205177, now seen corresponding path program 1 times [2022-11-23 15:19:19,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:19,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127753137] [2022-11-23 15:19:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:19,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:19:19,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127753137] [2022-11-23 15:19:19,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127753137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:19,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419183489] [2022-11-23 15:19:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:19,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:19,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:19,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:19,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:19:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:19,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:19:19,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 15:19:19,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:19,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419183489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:19,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:19,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:19:19,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279968111] [2022-11-23 15:19:19,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:19,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:19,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:19,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:19,852 INFO L87 Difference]: Start difference. First operand 483 states and 710 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:19:20,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:20,021 INFO L93 Difference]: Finished difference Result 1424 states and 2129 transitions. [2022-11-23 15:19:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:20,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-23 15:19:20,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:20,028 INFO L225 Difference]: With dead ends: 1424 [2022-11-23 15:19:20,028 INFO L226 Difference]: Without dead ends: 947 [2022-11-23 15:19:20,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:20,033 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 171 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:20,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 352 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-11-23 15:19:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 941. [2022-11-23 15:19:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 760 states have (on average 1.4631578947368422) internal successors, (1112), 765 states have internal predecessors, (1112), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-11-23 15:19:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1376 transitions. [2022-11-23 15:19:20,118 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1376 transitions. Word has length 101 [2022-11-23 15:19:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:20,118 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1376 transitions. [2022-11-23 15:19:20,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:19:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1376 transitions. [2022-11-23 15:19:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:19:20,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:20,122 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:20,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 15:19:20,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:20,328 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash -355658363, now seen corresponding path program 1 times [2022-11-23 15:19:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:20,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599364211] [2022-11-23 15:19:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:19:20,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:20,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599364211] [2022-11-23 15:19:20,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599364211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:20,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302909559] [2022-11-23 15:19:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:20,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:20,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:20,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:20,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:19:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:20,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:19:20,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:19:20,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:20,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302909559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:20,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:20,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:19:20,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655718120] [2022-11-23 15:19:20,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:20,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:20,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:20,679 INFO L87 Difference]: Start difference. First operand 941 states and 1376 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:19:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:20,925 INFO L93 Difference]: Finished difference Result 2786 states and 4141 transitions. [2022-11-23 15:19:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:20,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-23 15:19:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:20,935 INFO L225 Difference]: With dead ends: 2786 [2022-11-23 15:19:20,935 INFO L226 Difference]: Without dead ends: 1851 [2022-11-23 15:19:20,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:20,940 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 165 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:20,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 325 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2022-11-23 15:19:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1841. [2022-11-23 15:19:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1492 states have (on average 1.4557640750670242) internal successors, (2172), 1501 states have internal predecessors, (2172), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-11-23 15:19:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2676 transitions. [2022-11-23 15:19:21,099 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2676 transitions. Word has length 101 [2022-11-23 15:19:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:21,100 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2676 transitions. [2022-11-23 15:19:21,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:19:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2676 transitions. [2022-11-23 15:19:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:19:21,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:21,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:21,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:21,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 15:19:21,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:21,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:21,311 INFO L85 PathProgramCache]: Analyzing trace with hash 897339651, now seen corresponding path program 1 times [2022-11-23 15:19:21,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:21,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358797606] [2022-11-23 15:19:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:21,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:19:21,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:21,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358797606] [2022-11-23 15:19:21,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358797606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:21,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067510729] [2022-11-23 15:19:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:21,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:21,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:21,441 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:21,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:19:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:21,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:19:21,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:19:21,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:21,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067510729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:21,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:21,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:19:21,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101413627] [2022-11-23 15:19:21,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:21,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:21,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:21,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:21,682 INFO L87 Difference]: Start difference. First operand 1841 states and 2676 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:19:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:22,060 INFO L93 Difference]: Finished difference Result 5462 states and 8065 transitions. [2022-11-23 15:19:22,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:22,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-23 15:19:22,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:22,082 INFO L225 Difference]: With dead ends: 5462 [2022-11-23 15:19:22,082 INFO L226 Difference]: Without dead ends: 3627 [2022-11-23 15:19:22,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:22,096 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 156 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:22,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 325 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2022-11-23 15:19:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 3609. [2022-11-23 15:19:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 2932 states have (on average 1.4474761255115962) internal successors, (4244), 2949 states have internal predecessors, (4244), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-23 15:19:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 5212 transitions. [2022-11-23 15:19:22,437 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 5212 transitions. Word has length 101 [2022-11-23 15:19:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:22,439 INFO L495 AbstractCegarLoop]: Abstraction has 3609 states and 5212 transitions. [2022-11-23 15:19:22,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:19:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 5212 transitions. [2022-11-23 15:19:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:19:22,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:22,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:22,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:22,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:22,663 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash 362450885, now seen corresponding path program 1 times [2022-11-23 15:19:22,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:22,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710460925] [2022-11-23 15:19:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:22,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 15:19:22,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:22,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710460925] [2022-11-23 15:19:22,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710460925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:22,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:22,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:19:22,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066967042] [2022-11-23 15:19:22,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:22,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:22,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:22,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:22,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:22,750 INFO L87 Difference]: Start difference. First operand 3609 states and 5212 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:19:23,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:23,210 INFO L93 Difference]: Finished difference Result 6411 states and 9405 transitions. [2022-11-23 15:19:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:23,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 101 [2022-11-23 15:19:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:23,235 INFO L225 Difference]: With dead ends: 6411 [2022-11-23 15:19:23,235 INFO L226 Difference]: Without dead ends: 4569 [2022-11-23 15:19:23,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:23,243 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 82 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:23,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 412 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:23,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2022-11-23 15:19:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 4249. [2022-11-23 15:19:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 3540 states have (on average 1.4926553672316385) internal successors, (5284), 3557 states have internal predecessors, (5284), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-11-23 15:19:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 6284 transitions. [2022-11-23 15:19:23,646 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 6284 transitions. Word has length 101 [2022-11-23 15:19:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:23,646 INFO L495 AbstractCegarLoop]: Abstraction has 4249 states and 6284 transitions. [2022-11-23 15:19:23,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:19:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 6284 transitions. [2022-11-23 15:19:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:19:23,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:23,658 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:23,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:19:23,659 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:23,659 INFO L85 PathProgramCache]: Analyzing trace with hash -30126257, now seen corresponding path program 1 times [2022-11-23 15:19:23,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:23,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805718999] [2022-11-23 15:19:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:23,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 15:19:23,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:23,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805718999] [2022-11-23 15:19:23,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805718999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:23,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:23,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:19:23,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541226789] [2022-11-23 15:19:23,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:23,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:23,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:23,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:23,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:23,747 INFO L87 Difference]: Start difference. First operand 4249 states and 6284 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:19:24,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:24,588 INFO L93 Difference]: Finished difference Result 12590 states and 18833 transitions. [2022-11-23 15:19:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:24,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-23 15:19:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:24,629 INFO L225 Difference]: With dead ends: 12590 [2022-11-23 15:19:24,629 INFO L226 Difference]: Without dead ends: 8347 [2022-11-23 15:19:24,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:24,642 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 160 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:24,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 327 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:24,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8347 states. [2022-11-23 15:19:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8347 to 8297. [2022-11-23 15:19:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8297 states, 6916 states have (on average 1.481203007518797) internal successors, (10244), 6949 states have internal predecessors, (10244), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-11-23 15:19:25,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8297 states to 8297 states and 12172 transitions. [2022-11-23 15:19:25,486 INFO L78 Accepts]: Start accepts. Automaton has 8297 states and 12172 transitions. Word has length 136 [2022-11-23 15:19:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:25,486 INFO L495 AbstractCegarLoop]: Abstraction has 8297 states and 12172 transitions. [2022-11-23 15:19:25,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:19:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 8297 states and 12172 transitions. [2022-11-23 15:19:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:19:25,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:25,509 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:25,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 15:19:25,510 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:25,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1662439689, now seen corresponding path program 1 times [2022-11-23 15:19:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:25,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481717615] [2022-11-23 15:19:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:25,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 15:19:25,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:25,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481717615] [2022-11-23 15:19:25,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481717615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:25,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:25,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:19:25,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254888251] [2022-11-23 15:19:25,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:25,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:25,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:25,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:25,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:25,602 INFO L87 Difference]: Start difference. First operand 8297 states and 12172 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:19:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:27,224 INFO L93 Difference]: Finished difference Result 24590 states and 36465 transitions. [2022-11-23 15:19:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:27,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-23 15:19:27,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:27,311 INFO L225 Difference]: With dead ends: 24590 [2022-11-23 15:19:27,312 INFO L226 Difference]: Without dead ends: 16299 [2022-11-23 15:19:27,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:27,344 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 163 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:27,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 327 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:27,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16299 states. [2022-11-23 15:19:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16299 to 16201. [2022-11-23 15:19:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16201 states, 13508 states have (on average 1.4690553745928339) internal successors, (19844), 13573 states have internal predecessors, (19844), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-11-23 15:19:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16201 states to 16201 states and 23564 transitions. [2022-11-23 15:19:28,948 INFO L78 Accepts]: Start accepts. Automaton has 16201 states and 23564 transitions. Word has length 136 [2022-11-23 15:19:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:28,948 INFO L495 AbstractCegarLoop]: Abstraction has 16201 states and 23564 transitions. [2022-11-23 15:19:28,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:19:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 16201 states and 23564 transitions. [2022-11-23 15:19:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:19:28,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:28,997 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:28,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 15:19:28,998 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:28,998 INFO L85 PathProgramCache]: Analyzing trace with hash -771770248, now seen corresponding path program 1 times [2022-11-23 15:19:28,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:28,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12884746] [2022-11-23 15:19:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:28,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 15:19:29,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:29,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12884746] [2022-11-23 15:19:29,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12884746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:29,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:29,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:19:29,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140448420] [2022-11-23 15:19:29,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:29,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:29,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:29,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:29,091 INFO L87 Difference]: Start difference. First operand 16201 states and 23564 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:19:31,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:31,491 INFO L93 Difference]: Finished difference Result 48014 states and 70545 transitions. [2022-11-23 15:19:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:31,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-23 15:19:31,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:31,622 INFO L225 Difference]: With dead ends: 48014 [2022-11-23 15:19:31,622 INFO L226 Difference]: Without dead ends: 31819 [2022-11-23 15:19:31,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:19:31,672 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 165 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:31,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 341 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31819 states. [2022-11-23 15:19:34,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31819 to 31625. [2022-11-23 15:19:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31625 states, 26372 states have (on average 1.4562414682238738) internal successors, (38404), 26501 states have internal predecessors, (38404), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-11-23 15:19:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31625 states to 31625 states and 45580 transitions. [2022-11-23 15:19:34,713 INFO L78 Accepts]: Start accepts. Automaton has 31625 states and 45580 transitions. Word has length 136 [2022-11-23 15:19:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:34,714 INFO L495 AbstractCegarLoop]: Abstraction has 31625 states and 45580 transitions. [2022-11-23 15:19:34,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:19:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 31625 states and 45580 transitions. [2022-11-23 15:19:34,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 15:19:34,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:34,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:34,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 15:19:34,837 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:34,838 INFO L85 PathProgramCache]: Analyzing trace with hash 62910687, now seen corresponding path program 1 times [2022-11-23 15:19:34,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:34,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917430277] [2022-11-23 15:19:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:34,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-23 15:19:35,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:35,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917430277] [2022-11-23 15:19:35,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917430277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:35,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244042872] [2022-11-23 15:19:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:35,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:35,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:35,006 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:35,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:19:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:35,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:19:35,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 15:19:35,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:35,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244042872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:35,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:35,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 15:19:35,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132607945] [2022-11-23 15:19:35,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:35,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:35,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:35,273 INFO L87 Difference]: Start difference. First operand 31625 states and 45580 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:19:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:38,864 INFO L93 Difference]: Finished difference Result 60237 states and 87758 transitions. [2022-11-23 15:19:38,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:38,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2022-11-23 15:19:38,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:39,047 INFO L225 Difference]: With dead ends: 60237 [2022-11-23 15:19:39,047 INFO L226 Difference]: Without dead ends: 44139 [2022-11-23 15:19:39,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:39,085 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 125 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:39,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 448 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44139 states. [2022-11-23 15:19:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44139 to 38185. [2022-11-23 15:19:42,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38185 states, 32548 states have (on average 1.4984638072999876) internal successors, (48772), 32677 states have internal predecessors, (48772), 3780 states have call successors, (3780), 1856 states have call predecessors, (3780), 1856 states have return successors, (3780), 3652 states have call predecessors, (3780), 3780 states have call successors, (3780) [2022-11-23 15:19:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38185 states to 38185 states and 56332 transitions. [2022-11-23 15:19:42,415 INFO L78 Accepts]: Start accepts. Automaton has 38185 states and 56332 transitions. Word has length 156 [2022-11-23 15:19:42,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:42,416 INFO L495 AbstractCegarLoop]: Abstraction has 38185 states and 56332 transitions. [2022-11-23 15:19:42,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:19:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 38185 states and 56332 transitions. [2022-11-23 15:19:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 15:19:42,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:42,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:42,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:42,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:42,714 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash -130005352, now seen corresponding path program 2 times [2022-11-23 15:19:42,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:42,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980039364] [2022-11-23 15:19:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:42,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-23 15:19:43,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:43,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980039364] [2022-11-23 15:19:43,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980039364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:43,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765737923] [2022-11-23 15:19:43,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:19:43,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:43,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:43,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:43,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444c6698-ef5b-4ee5-89fb-3d966ee5fdda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:19:43,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:19:43,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:19:43,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:19:43,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 76 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 15:19:43,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:19:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 52 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 15:19:44,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765737923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:19:44,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130718221] [2022-11-23 15:19:44,097 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-11-23 15:19:44,097 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:19:44,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:19:44,099 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:19:44,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs