./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/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_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/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_50ba055a-ec0f-4708-8c89-4095b69a9ead/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 dbdff9d5cdb7ffcae57151b3d045900600728670d8aad942a459f8d05b6221fb --- 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 13:55:28,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:55:28,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:55:28,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:55:28,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:55:28,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:55:28,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:55:28,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:55:28,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:55:28,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:55:28,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:55:28,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:55:28,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:55:28,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:55:28,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:55:28,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:55:28,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:55:28,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:55:28,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:55:28,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:55:28,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:55:28,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:55:28,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:55:28,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:55:28,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:55:28,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:55:28,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:55:28,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:55:28,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:55:28,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:55:28,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:55:28,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:55:28,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:55:28,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:55:28,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:55:28,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:55:28,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:55:28,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:55:28,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:55:28,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:55:28,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:55:28,377 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:55:28,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:55:28,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:55:28,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:55:28,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:55:28,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:55:28,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:55:28,427 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:55:28,427 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:55:28,427 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:55:28,428 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:55:28,429 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:55:28,429 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:55:28,429 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:55:28,430 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:55:28,430 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:55:28,430 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:55:28,431 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:55:28,431 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:55:28,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:55:28,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:55:28,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:55:28,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:55:28,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:55:28,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:55:28,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:55:28,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:55:28,434 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:55:28,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:55:28,435 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:55:28,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:55:28,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:55:28,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:55:28,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:55:28,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:55:28,436 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:55:28,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:55:28,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:55:28,437 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:55:28,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:55:28,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:55:28,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:55:28,439 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_50ba055a-ec0f-4708-8c89-4095b69a9ead/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbdff9d5cdb7ffcae57151b3d045900600728670d8aad942a459f8d05b6221fb [2022-11-23 13:55:28,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:55:28,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:55:28,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:55:28,802 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:55:28,802 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:55:28,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2022-11-23 13:55:31,875 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:55:32,248 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:55:32,249 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2022-11-23 13:55:32,282 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/data/a7e7be440/ed8c688dc03f4fb78e7770eaa9150b73/FLAG55fcf6b6b [2022-11-23 13:55:32,304 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/data/a7e7be440/ed8c688dc03f4fb78e7770eaa9150b73 [2022-11-23 13:55:32,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:55:32,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:55:32,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:55:32,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:55:32,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:55:32,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:55:32" (1/1) ... [2022-11-23 13:55:32,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d2b6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:32, skipping insertion in model container [2022-11-23 13:55:32,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:55:32" (1/1) ... [2022-11-23 13:55:32,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:55:32,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:55:32,650 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_50ba055a-ec0f-4708-8c89-4095b69a9ead/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[914,927] [2022-11-23 13:55:32,750 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_50ba055a-ec0f-4708-8c89-4095b69a9ead/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[7115,7128] [2022-11-23 13:55:32,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:55:32,896 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:55:32,912 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_50ba055a-ec0f-4708-8c89-4095b69a9ead/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[914,927] [2022-11-23 13:55:32,939 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_50ba055a-ec0f-4708-8c89-4095b69a9ead/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[7115,7128] [2022-11-23 13:55:33,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:55:33,043 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:55:33,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33 WrapperNode [2022-11-23 13:55:33,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:55:33,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:55:33,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:55:33,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:55:33,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (1/1) ... [2022-11-23 13:55:33,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (1/1) ... [2022-11-23 13:55:33,129 INFO L138 Inliner]: procedures = 73, calls = 87, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 924 [2022-11-23 13:55:33,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:55:33,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:55:33,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:55:33,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:55:33,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (1/1) ... [2022-11-23 13:55:33,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (1/1) ... [2022-11-23 13:55:33,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (1/1) ... [2022-11-23 13:55:33,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (1/1) ... [2022-11-23 13:55:33,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (1/1) ... [2022-11-23 13:55:33,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (1/1) ... [2022-11-23 13:55:33,187 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (1/1) ... [2022-11-23 13:55:33,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (1/1) ... [2022-11-23 13:55:33,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:55:33,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:55:33,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:55:33,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:55:33,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (1/1) ... [2022-11-23 13:55:33,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:55:33,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:55:33,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:55:33,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:55:33,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:55:33,311 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 13:55:33,311 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 13:55:33,311 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-23 13:55:33,312 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-23 13:55:33,312 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 13:55:33,312 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 13:55:33,312 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 13:55:33,313 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 13:55:33,313 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-23 13:55:33,313 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-23 13:55:33,313 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 13:55:33,314 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 13:55:33,314 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 13:55:33,314 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 13:55:33,314 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-23 13:55:33,315 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-23 13:55:33,315 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-23 13:55:33,315 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-23 13:55:33,315 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-23 13:55:33,316 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-23 13:55:33,316 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 13:55:33,316 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 13:55:33,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:55:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 13:55:33,318 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 13:55:33,319 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-23 13:55:33,321 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-23 13:55:33,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:55:33,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:55:33,323 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 13:55:33,323 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 13:55:33,551 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:55:33,554 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:55:34,785 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:55:35,402 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:55:35,402 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-11-23 13:55:35,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:55:35 BoogieIcfgContainer [2022-11-23 13:55:35,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:55:35,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:55:35,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:55:35,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:55:35,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:55:32" (1/3) ... [2022-11-23 13:55:35,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf7ac73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:55:35, skipping insertion in model container [2022-11-23 13:55:35,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:33" (2/3) ... [2022-11-23 13:55:35,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf7ac73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:55:35, skipping insertion in model container [2022-11-23 13:55:35,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:55:35" (3/3) ... [2022-11-23 13:55:35,419 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2022-11-23 13:55:35,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:55:35,440 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 13:55:35,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:55:35,524 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;@22481b5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:55:35,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 13:55:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 183 states have (on average 1.53551912568306) internal successors, (281), 189 states have internal predecessors, (281), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-23 13:55:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 13:55:35,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:35,545 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] [2022-11-23 13:55:35,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:55:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:35,551 INFO L85 PathProgramCache]: Analyzing trace with hash -31898432, now seen corresponding path program 1 times [2022-11-23 13:55:35,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:55:35,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572078771] [2022-11-23 13:55:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:35,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:55:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:36,311 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 13:55:36,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:55:36,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572078771] [2022-11-23 13:55:36,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572078771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:55:36,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:55:36,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:55:36,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585285080] [2022-11-23 13:55:36,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:55:36,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:55:36,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:55:36,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:55:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:55:36,375 INFO L87 Difference]: Start difference. First operand has 238 states, 183 states have (on average 1.53551912568306) internal successors, (281), 189 states have internal predecessors, (281), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 13:55:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:55:37,658 INFO L93 Difference]: Finished difference Result 533 states and 782 transitions. [2022-11-23 13:55:37,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 13:55:37,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-11-23 13:55:37,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:55:37,682 INFO L225 Difference]: With dead ends: 533 [2022-11-23 13:55:37,682 INFO L226 Difference]: Without dead ends: 298 [2022-11-23 13:55:37,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 13:55:37,695 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 520 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:55:37,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1024 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 13:55:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-23 13:55:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 285. [2022-11-23 13:55:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 217 states have (on average 1.456221198156682) internal successors, (316), 221 states have internal predecessors, (316), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-23 13:55:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 406 transitions. [2022-11-23 13:55:37,787 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 406 transitions. Word has length 45 [2022-11-23 13:55:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:55:37,787 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 406 transitions. [2022-11-23 13:55:37,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 13:55:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 406 transitions. [2022-11-23 13:55:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 13:55:37,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:37,791 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] [2022-11-23 13:55:37,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:55:37,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:55:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:37,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1186909786, now seen corresponding path program 1 times [2022-11-23 13:55:37,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:55:37,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501827803] [2022-11-23 13:55:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:37,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:55:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:37,874 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 13:55:37,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:55:37,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501827803] [2022-11-23 13:55:37,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501827803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:55:37,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:55:37,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:55:37,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480071061] [2022-11-23 13:55:37,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:55:37,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:55:37,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:55:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:55:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:55:37,878 INFO L87 Difference]: Start difference. First operand 285 states and 406 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:55:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:55:38,030 INFO L93 Difference]: Finished difference Result 510 states and 693 transitions. [2022-11-23 13:55:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:55:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-11-23 13:55:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:55:38,038 INFO L225 Difference]: With dead ends: 510 [2022-11-23 13:55:38,038 INFO L226 Difference]: Without dead ends: 394 [2022-11-23 13:55:38,043 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 13:55:38,044 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 317 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:55:38,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 355 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:55:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-23 13:55:38,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 380. [2022-11-23 13:55:38,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 282 states have (on average 1.4042553191489362) internal successors, (396), 286 states have internal predecessors, (396), 62 states have call successors, (62), 35 states have call predecessors, (62), 34 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-11-23 13:55:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 518 transitions. [2022-11-23 13:55:38,125 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 518 transitions. Word has length 46 [2022-11-23 13:55:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:55:38,125 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 518 transitions. [2022-11-23 13:55:38,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:55:38,126 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 518 transitions. [2022-11-23 13:55:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 13:55:38,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:38,128 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] [2022-11-23 13:55:38,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:55:38,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:55:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:38,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1060423690, now seen corresponding path program 1 times [2022-11-23 13:55:38,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:55:38,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047436535] [2022-11-23 13:55:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:38,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:55:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:38,213 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 13:55:38,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:55:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047436535] [2022-11-23 13:55:38,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047436535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:55:38,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:55:38,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:55:38,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285097755] [2022-11-23 13:55:38,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:55:38,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:55:38,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:55:38,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:55:38,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:55:38,217 INFO L87 Difference]: Start difference. First operand 380 states and 518 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:55:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:55:38,394 INFO L93 Difference]: Finished difference Result 744 states and 966 transitions. [2022-11-23 13:55:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:55:38,395 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-23 13:55:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:55:38,399 INFO L225 Difference]: With dead ends: 744 [2022-11-23 13:55:38,399 INFO L226 Difference]: Without dead ends: 534 [2022-11-23 13:55:38,400 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 13:55:38,402 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 68 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:55:38,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 558 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:55:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-11-23 13:55:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 530. [2022-11-23 13:55:38,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 387 states have (on average 1.372093023255814) internal successors, (531), 391 states have internal predecessors, (531), 86 states have call successors, (86), 56 states have call predecessors, (86), 55 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-11-23 13:55:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 701 transitions. [2022-11-23 13:55:38,451 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 701 transitions. Word has length 47 [2022-11-23 13:55:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:55:38,452 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 701 transitions. [2022-11-23 13:55:38,452 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:55:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 701 transitions. [2022-11-23 13:55:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 13:55:38,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:38,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:55:38,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:55:38,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:55:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:38,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1773382153, now seen corresponding path program 1 times [2022-11-23 13:55:38,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:55:38,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426314330] [2022-11-23 13:55:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:38,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:55:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:38,510 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 13:55:38,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:55:38,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426314330] [2022-11-23 13:55:38,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426314330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:55:38,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:55:38,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:55:38,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401501965] [2022-11-23 13:55:38,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:55:38,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:55:38,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:55:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:55:38,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:55:38,513 INFO L87 Difference]: Start difference. First operand 530 states and 701 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:55:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:55:38,686 INFO L93 Difference]: Finished difference Result 954 states and 1223 transitions. [2022-11-23 13:55:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:55:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-23 13:55:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:55:38,690 INFO L225 Difference]: With dead ends: 954 [2022-11-23 13:55:38,691 INFO L226 Difference]: Without dead ends: 593 [2022-11-23 13:55:38,692 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 13:55:38,693 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 317 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:55:38,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 362 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:55:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-23 13:55:38,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 581. [2022-11-23 13:55:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 423 states have (on average 1.3546099290780143) internal successors, (573), 427 states have internal predecessors, (573), 94 states have call successors, (94), 63 states have call predecessors, (94), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-23 13:55:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 759 transitions. [2022-11-23 13:55:38,755 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 759 transitions. Word has length 53 [2022-11-23 13:55:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:55:38,756 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 759 transitions. [2022-11-23 13:55:38,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:55:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 759 transitions. [2022-11-23 13:55:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 13:55:38,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:38,759 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:55:38,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:55:38,759 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:55:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1376511154, now seen corresponding path program 1 times [2022-11-23 13:55:38,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:55:38,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724995511] [2022-11-23 13:55:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:38,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:55:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:38,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:55:38,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724995511] [2022-11-23 13:55:38,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724995511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:55:38,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:55:38,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:55:38,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71305322] [2022-11-23 13:55:38,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:55:38,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:55:38,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:55:38,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:55:38,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:55:38,951 INFO L87 Difference]: Start difference. First operand 581 states and 759 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 13:55:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:55:39,388 INFO L93 Difference]: Finished difference Result 690 states and 891 transitions. [2022-11-23 13:55:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:55:39,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-23 13:55:39,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:55:39,393 INFO L225 Difference]: With dead ends: 690 [2022-11-23 13:55:39,393 INFO L226 Difference]: Without dead ends: 687 [2022-11-23 13:55:39,394 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 13:55:39,399 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 572 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:55:39,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 341 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:55:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-11-23 13:55:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 580. [2022-11-23 13:55:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 423 states have (on average 1.3475177304964538) internal successors, (570), 426 states have internal predecessors, (570), 93 states have call successors, (93), 63 states have call predecessors, (93), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-23 13:55:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 755 transitions. [2022-11-23 13:55:39,492 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 755 transitions. Word has length 54 [2022-11-23 13:55:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:55:39,493 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 755 transitions. [2022-11-23 13:55:39,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 13:55:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 755 transitions. [2022-11-23 13:55:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 13:55:39,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:39,497 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:55:39,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:55:39,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:55:39,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:39,498 INFO L85 PathProgramCache]: Analyzing trace with hash 276540147, now seen corresponding path program 1 times [2022-11-23 13:55:39,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:55:39,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806552899] [2022-11-23 13:55:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:39,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:55:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:39,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:55:39,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806552899] [2022-11-23 13:55:39,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806552899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:55:39,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061341871] [2022-11-23 13:55:39,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:39,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:55:39,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:55:39,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:55:39,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:55:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:55:39,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:55:39,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:55:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:40,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:55:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:55:40,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061341871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:55:40,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428809582] [2022-11-23 13:55:40,720 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 13:55:40,720 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:55:40,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:55:40,731 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:55:40,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:55:46,535 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 185 for LOIs [2022-11-23 13:55:46,580 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 181 for LOIs [2022-11-23 13:55:46,618 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 189 for LOIs [2022-11-23 13:55:47,641 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 185 for LOIs [2022-11-23 13:55:47,785 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 185 for LOIs [2022-11-23 13:55:47,904 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 185 for LOIs [2022-11-23 13:55:47,950 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 192 for LOIs [2022-11-23 13:55:47,993 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:56:11,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [428809582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:11,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:56:11,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2022-11-23 13:56:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537763501] [2022-11-23 13:56:11,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:11,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 13:56:11,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:11,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 13:56:11,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 13:56:11,915 INFO L87 Difference]: Start difference. First operand 580 states and 755 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 13:56:54,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:54,213 INFO L93 Difference]: Finished difference Result 1039 states and 1302 transitions. [2022-11-23 13:56:54,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 13:56:54,215 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-23 13:56:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:54,218 INFO L225 Difference]: With dead ends: 1039 [2022-11-23 13:56:54,219 INFO L226 Difference]: Without dead ends: 629 [2022-11-23 13:56:54,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2022-11-23 13:56:54,222 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 198 mSDsluCounter, 2716 mSDsCounter, 0 mSdLazyCounter, 6881 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 7068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 6881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:54,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 2982 Invalid, 7068 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [187 Valid, 6881 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2022-11-23 13:56:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-23 13:56:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 614. [2022-11-23 13:56:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 449 states have (on average 1.3318485523385302) internal successors, (598), 452 states have internal predecessors, (598), 95 states have call successors, (95), 69 states have call predecessors, (95), 68 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-23 13:56:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 787 transitions. [2022-11-23 13:56:54,344 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 787 transitions. Word has length 55 [2022-11-23 13:56:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:54,344 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 787 transitions. [2022-11-23 13:56:54,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 13:56:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 787 transitions. [2022-11-23 13:56:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 13:56:54,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:54,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:54,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 13:56:54,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:54,556 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:56:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash 591704991, now seen corresponding path program 1 times [2022-11-23 13:56:54,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:54,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330725916] [2022-11-23 13:56:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:54,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:54,607 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 13:56:54,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:54,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330725916] [2022-11-23 13:56:54,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330725916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:54,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:54,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:56:54,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635604068] [2022-11-23 13:56:54,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:54,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:56:54,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:54,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:56:54,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:54,615 INFO L87 Difference]: Start difference. First operand 614 states and 787 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:56:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:54,846 INFO L93 Difference]: Finished difference Result 1065 states and 1343 transitions. [2022-11-23 13:56:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:56:54,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-23 13:56:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:54,858 INFO L225 Difference]: With dead ends: 1065 [2022-11-23 13:56:54,858 INFO L226 Difference]: Without dead ends: 797 [2022-11-23 13:56:54,859 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 13:56:54,861 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 44 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:54,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 605 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:56:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-23 13:56:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 668. [2022-11-23 13:56:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 493 states have (on average 1.332657200811359) internal successors, (657), 496 states have internal predecessors, (657), 100 states have call successors, (100), 74 states have call predecessors, (100), 73 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-23 13:56:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 856 transitions. [2022-11-23 13:56:54,974 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 856 transitions. Word has length 61 [2022-11-23 13:56:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:54,975 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 856 transitions. [2022-11-23 13:56:54,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:56:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 856 transitions. [2022-11-23 13:56:54,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 13:56:54,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:54,977 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:54,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 13:56:54,978 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:56:54,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash 697656493, now seen corresponding path program 1 times [2022-11-23 13:56:54,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:54,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981580699] [2022-11-23 13:56:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:54,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:56:55,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:55,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981580699] [2022-11-23 13:56:55,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981580699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:55,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:55,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:56:55,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691525581] [2022-11-23 13:56:55,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:55,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:56:55,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:55,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:56:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:56:55,174 INFO L87 Difference]: Start difference. First operand 668 states and 856 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:56:56,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:56,147 INFO L93 Difference]: Finished difference Result 1348 states and 1673 transitions. [2022-11-23 13:56:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 13:56:56,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-23 13:56:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:56,152 INFO L225 Difference]: With dead ends: 1348 [2022-11-23 13:56:56,152 INFO L226 Difference]: Without dead ends: 931 [2022-11-23 13:56:56,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 13:56:56,155 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 481 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:56,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 974 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 13:56:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-23 13:56:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 896. [2022-11-23 13:56:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 646 states have (on average 1.3003095975232197) internal successors, (840), 649 states have internal predecessors, (840), 140 states have call successors, (140), 109 states have call predecessors, (140), 108 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-11-23 13:56:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1119 transitions. [2022-11-23 13:56:56,291 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1119 transitions. Word has length 63 [2022-11-23 13:56:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:56,291 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1119 transitions. [2022-11-23 13:56:56,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:56:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1119 transitions. [2022-11-23 13:56:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 13:56:56,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:56,294 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:56,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:56:56,294 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:56:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1818090544, now seen corresponding path program 1 times [2022-11-23 13:56:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:56,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210367658] [2022-11-23 13:56:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:56,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:56:56,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:56,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210367658] [2022-11-23 13:56:56,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210367658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:56:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294922484] [2022-11-23 13:56:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:56,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:56,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:56:56,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:56:56,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:56:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:56,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:56:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:56:56,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:56:57,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294922484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:57,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079713577] [2022-11-23 13:56:57,013 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 13:56:57,013 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:56:57,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:56:57,013 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:56:57,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:57:15,663 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 185 for LOIs [2022-11-23 13:57:15,688 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 283 for LOIs [2022-11-23 13:57:15,806 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 277 for LOIs [2022-11-23 13:57:15,930 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 189 for LOIs [2022-11-23 13:57:16,551 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 185 for LOIs [2022-11-23 13:57:16,623 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 185 for LOIs [2022-11-23 13:57:16,691 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 185 for LOIs [2022-11-23 13:57:16,717 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 192 for LOIs [2022-11-23 13:57:16,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:57:58,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17793#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t10_i~0 0) (= ~t7_i~0 0) (= 0 ~t8_pc~0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~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) (<= ~t7_pc~0 0) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~T8_E~0) (= ~T7_E~0 2) (<= 2 ~E_9~0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~t9_st~0 0) (= ~E_2~0 2) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 0 ~t10_pc~0) (= ~c_dr_pc~0 0) (<= 2 ~E_4~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (<= 2 ~E_10~0) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= 2 ~T9_E~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (= 0 ~t2_st~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 13:57:58,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:57:58,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:57:58,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 13:57:58,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868569601] [2022-11-23 13:57:58,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:57:58,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:57:58,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:57:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 13:57:58,436 INFO L87 Difference]: Start difference. First operand 896 states and 1119 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-23 13:57:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:59,300 INFO L93 Difference]: Finished difference Result 2441 states and 2986 transitions. [2022-11-23 13:57:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:57:59,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-23 13:57:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:59,311 INFO L225 Difference]: With dead ends: 2441 [2022-11-23 13:57:59,311 INFO L226 Difference]: Without dead ends: 2438 [2022-11-23 13:57:59,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 13:57:59,314 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 803 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:59,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 1270 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:57:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2022-11-23 13:57:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1636. [2022-11-23 13:57:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1164 states have (on average 1.2869415807560138) internal successors, (1498), 1167 states have internal predecessors, (1498), 258 states have call successors, (258), 213 states have call predecessors, (258), 212 states have return successors, (257), 257 states have call predecessors, (257), 257 states have call successors, (257) [2022-11-23 13:57:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2013 transitions. [2022-11-23 13:57:59,532 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2013 transitions. Word has length 64 [2022-11-23 13:57:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:59,532 INFO L495 AbstractCegarLoop]: Abstraction has 1636 states and 2013 transitions. [2022-11-23 13:57:59,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-23 13:57:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2013 transitions. [2022-11-23 13:57:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 13:57:59,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:59,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:59,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 13:57:59,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:59,740 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:57:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1243941212, now seen corresponding path program 1 times [2022-11-23 13:57:59,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:59,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498269063] [2022-11-23 13:57:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:59,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:59,925 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 13:57:59,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:59,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498269063] [2022-11-23 13:57:59,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498269063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:59,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:59,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:57:59,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749748426] [2022-11-23 13:57:59,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:59,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:57:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:59,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:57:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:57:59,928 INFO L87 Difference]: Start difference. First operand 1636 states and 2013 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 13:58:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:01,065 INFO L93 Difference]: Finished difference Result 2404 states and 3278 transitions. [2022-11-23 13:58:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:58:01,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2022-11-23 13:58:01,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:01,078 INFO L225 Difference]: With dead ends: 2404 [2022-11-23 13:58:01,078 INFO L226 Difference]: Without dead ends: 2245 [2022-11-23 13:58:01,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:58:01,081 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 1267 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:01,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 1266 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 13:58:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2022-11-23 13:58:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2234. [2022-11-23 13:58:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 1661 states have (on average 1.3558097531607465) internal successors, (2252), 1667 states have internal predecessors, (2252), 335 states have call successors, (335), 237 states have call predecessors, (335), 236 states have return successors, (388), 331 states have call predecessors, (388), 334 states have call successors, (388) [2022-11-23 13:58:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 2975 transitions. [2022-11-23 13:58:01,350 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 2975 transitions. Word has length 61 [2022-11-23 13:58:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:01,351 INFO L495 AbstractCegarLoop]: Abstraction has 2234 states and 2975 transitions. [2022-11-23 13:58:01,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 13:58:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 2975 transitions. [2022-11-23 13:58:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 13:58:01,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:01,353 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:01,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 13:58:01,353 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1885757045, now seen corresponding path program 2 times [2022-11-23 13:58:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:01,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670969343] [2022-11-23 13:58:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:58:01,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670969343] [2022-11-23 13:58:01,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670969343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:01,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:01,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:58:01,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575286111] [2022-11-23 13:58:01,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:01,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:58:01,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:58:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:58:01,396 INFO L87 Difference]: Start difference. First operand 2234 states and 2975 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:58:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:01,747 INFO L93 Difference]: Finished difference Result 3002 states and 3907 transitions. [2022-11-23 13:58:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:58:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-23 13:58:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:01,757 INFO L225 Difference]: With dead ends: 3002 [2022-11-23 13:58:01,757 INFO L226 Difference]: Without dead ends: 1812 [2022-11-23 13:58:01,761 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 13:58:01,762 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 317 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:01,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 398 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:58:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-23 13:58:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1802. [2022-11-23 13:58:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1357 states have (on average 1.3662490788504054) internal successors, (1854), 1363 states have internal predecessors, (1854), 267 states have call successors, (267), 177 states have call predecessors, (267), 176 states have return successors, (320), 263 states have call predecessors, (320), 266 states have call successors, (320) [2022-11-23 13:58:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 2441 transitions. [2022-11-23 13:58:02,011 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 2441 transitions. Word has length 67 [2022-11-23 13:58:02,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:02,012 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 2441 transitions. [2022-11-23 13:58:02,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:58:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 2441 transitions. [2022-11-23 13:58:02,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 13:58:02,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:02,015 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:02,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 13:58:02,016 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:02,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1773230297, now seen corresponding path program 1 times [2022-11-23 13:58:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:02,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120538250] [2022-11-23 13:58:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:02,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:58:02,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:02,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120538250] [2022-11-23 13:58:02,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120538250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:02,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:02,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:58:02,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461848811] [2022-11-23 13:58:02,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:02,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:58:02,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:02,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:58:02,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:58:02,070 INFO L87 Difference]: Start difference. First operand 1802 states and 2441 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:58:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:02,418 INFO L93 Difference]: Finished difference Result 2833 states and 3674 transitions. [2022-11-23 13:58:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:58:02,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-23 13:58:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:02,428 INFO L225 Difference]: With dead ends: 2833 [2022-11-23 13:58:02,429 INFO L226 Difference]: Without dead ends: 1976 [2022-11-23 13:58:02,432 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 13:58:02,432 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 39 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:02,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 596 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:58:02,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-11-23 13:58:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1847. [2022-11-23 13:58:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1394 states have (on average 1.3615494978479197) internal successors, (1898), 1400 states have internal predecessors, (1898), 271 states have call successors, (271), 181 states have call predecessors, (271), 180 states have return successors, (324), 267 states have call predecessors, (324), 270 states have call successors, (324) [2022-11-23 13:58:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2493 transitions. [2022-11-23 13:58:02,713 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2493 transitions. Word has length 71 [2022-11-23 13:58:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:02,713 INFO L495 AbstractCegarLoop]: Abstraction has 1847 states and 2493 transitions. [2022-11-23 13:58:02,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:58:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2493 transitions. [2022-11-23 13:58:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 13:58:02,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:02,716 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 13:58:02,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 13:58:02,716 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1069876203, now seen corresponding path program 1 times [2022-11-23 13:58:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:02,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323070503] [2022-11-23 13:58:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 13:58:03,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:03,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323070503] [2022-11-23 13:58:03,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323070503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:03,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17418321] [2022-11-23 13:58:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:03,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:03,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:03,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:03,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:58:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:03,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:58:03,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:58:03,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:58:03,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17418321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:03,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:58:03,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-23 13:58:03,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792871486] [2022-11-23 13:58:03,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:03,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:58:03,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:03,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:58:03,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:58:03,352 INFO L87 Difference]: Start difference. First operand 1847 states and 2493 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:58:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:03,717 INFO L93 Difference]: Finished difference Result 2676 states and 3511 transitions. [2022-11-23 13:58:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:58:03,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-23 13:58:03,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:03,727 INFO L225 Difference]: With dead ends: 2676 [2022-11-23 13:58:03,727 INFO L226 Difference]: Without dead ends: 1876 [2022-11-23 13:58:03,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:58:03,730 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 47 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:03,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 608 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:58:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2022-11-23 13:58:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1843. [2022-11-23 13:58:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1390 states have (on average 1.339568345323741) internal successors, (1862), 1396 states have internal predecessors, (1862), 271 states have call successors, (271), 181 states have call predecessors, (271), 180 states have return successors, (324), 267 states have call predecessors, (324), 270 states have call successors, (324) [2022-11-23 13:58:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2457 transitions. [2022-11-23 13:58:03,995 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2457 transitions. Word has length 102 [2022-11-23 13:58:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:03,995 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2457 transitions. [2022-11-23 13:58:03,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:58:03,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2457 transitions. [2022-11-23 13:58:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 13:58:03,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:03,998 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:04,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:04,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:04,205 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash 506681556, now seen corresponding path program 1 times [2022-11-23 13:58:04,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:04,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983306963] [2022-11-23 13:58:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:04,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 13:58:04,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:04,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983306963] [2022-11-23 13:58:04,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983306963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:04,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506586203] [2022-11-23 13:58:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:04,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:04,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:04,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:04,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:58:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:04,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 13:58:04,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:58:04,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:58:04,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506586203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:04,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:58:04,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-23 13:58:04,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415743818] [2022-11-23 13:58:04,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:04,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:58:04,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:04,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:58:04,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:58:04,831 INFO L87 Difference]: Start difference. First operand 1843 states and 2457 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:58:05,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:05,371 INFO L93 Difference]: Finished difference Result 2727 states and 3527 transitions. [2022-11-23 13:58:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 13:58:05,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-23 13:58:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:05,382 INFO L225 Difference]: With dead ends: 2727 [2022-11-23 13:58:05,383 INFO L226 Difference]: Without dead ends: 1674 [2022-11-23 13:58:05,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:58:05,386 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 309 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:05,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1311 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:58:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-11-23 13:58:05,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1477. [2022-11-23 13:58:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1156 states have (on average 1.3728373702422145) internal successors, (1587), 1162 states have internal predecessors, (1587), 200 states have call successors, (200), 120 states have call predecessors, (200), 119 states have return successors, (253), 196 states have call predecessors, (253), 199 states have call successors, (253) [2022-11-23 13:58:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2040 transitions. [2022-11-23 13:58:05,582 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2040 transitions. Word has length 102 [2022-11-23 13:58:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:05,582 INFO L495 AbstractCegarLoop]: Abstraction has 1477 states and 2040 transitions. [2022-11-23 13:58:05,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:58:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2040 transitions. [2022-11-23 13:58:05,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 13:58:05,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:05,585 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:58:05,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:05,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 13:58:05,791 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash -441502279, now seen corresponding path program 1 times [2022-11-23 13:58:05,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:05,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399925861] [2022-11-23 13:58:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:05,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 13:58:05,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:05,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399925861] [2022-11-23 13:58:05,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399925861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:05,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:05,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:58:05,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241498039] [2022-11-23 13:58:05,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:05,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:58:05,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:05,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:58:05,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:58:05,856 INFO L87 Difference]: Start difference. First operand 1477 states and 2040 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 13:58:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:06,289 INFO L93 Difference]: Finished difference Result 2096 states and 2782 transitions. [2022-11-23 13:58:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:58:06,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 112 [2022-11-23 13:58:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:06,297 INFO L225 Difference]: With dead ends: 2096 [2022-11-23 13:58:06,297 INFO L226 Difference]: Without dead ends: 1476 [2022-11-23 13:58:06,299 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 13:58:06,300 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 369 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:06,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 551 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:58:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2022-11-23 13:58:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1467. [2022-11-23 13:58:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1146 states have (on average 1.3534031413612566) internal successors, (1551), 1152 states have internal predecessors, (1551), 200 states have call successors, (200), 120 states have call predecessors, (200), 119 states have return successors, (253), 196 states have call predecessors, (253), 199 states have call successors, (253) [2022-11-23 13:58:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2004 transitions. [2022-11-23 13:58:06,545 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2004 transitions. Word has length 112 [2022-11-23 13:58:06,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:06,546 INFO L495 AbstractCegarLoop]: Abstraction has 1467 states and 2004 transitions. [2022-11-23 13:58:06,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 13:58:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2004 transitions. [2022-11-23 13:58:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 13:58:06,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:06,549 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:58:06,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 13:58:06,550 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:06,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1451939896, now seen corresponding path program 1 times [2022-11-23 13:58:06,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:06,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996757056] [2022-11-23 13:58:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:06,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 13:58:06,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:06,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996757056] [2022-11-23 13:58:06,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996757056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:06,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13195010] [2022-11-23 13:58:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:06,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:06,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:06,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:06,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:58:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:06,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:58:06,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:58:07,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:58:07,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13195010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:07,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:58:07,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-23 13:58:07,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015579565] [2022-11-23 13:58:07,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:07,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:58:07,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:58:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 13:58:07,005 INFO L87 Difference]: Start difference. First operand 1467 states and 2004 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:58:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:07,436 INFO L93 Difference]: Finished difference Result 2016 states and 2629 transitions. [2022-11-23 13:58:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:58:07,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-23 13:58:07,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:07,443 INFO L225 Difference]: With dead ends: 2016 [2022-11-23 13:58:07,443 INFO L226 Difference]: Without dead ends: 1423 [2022-11-23 13:58:07,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:58:07,446 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 71 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:07,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1274 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:58:07,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-11-23 13:58:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1331. [2022-11-23 13:58:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1046 states have (on average 1.3709369024856597) internal successors, (1434), 1052 states have internal predecessors, (1434), 181 states have call successors, (181), 103 states have call predecessors, (181), 102 states have return successors, (234), 177 states have call predecessors, (234), 180 states have call successors, (234) [2022-11-23 13:58:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1849 transitions. [2022-11-23 13:58:07,650 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1849 transitions. Word has length 112 [2022-11-23 13:58:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:07,651 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 1849 transitions. [2022-11-23 13:58:07,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 13:58:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1849 transitions. [2022-11-23 13:58:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 13:58:07,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:07,654 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:07,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:07,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 13:58:07,860 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:07,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:07,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1407373216, now seen corresponding path program 1 times [2022-11-23 13:58:07,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:07,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687583285] [2022-11-23 13:58:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:07,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 13:58:08,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:08,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687583285] [2022-11-23 13:58:08,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687583285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:08,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31652177] [2022-11-23 13:58:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:08,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:08,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:08,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:08,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 13:58:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:58:08,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 13:58:08,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:58:08,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31652177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:08,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:58:08,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-23 13:58:08,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874221114] [2022-11-23 13:58:08,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:08,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:58:08,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:08,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:58:08,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:58:08,273 INFO L87 Difference]: Start difference. First operand 1331 states and 1849 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:58:08,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:08,713 INFO L93 Difference]: Finished difference Result 2080 states and 2694 transitions. [2022-11-23 13:58:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:58:08,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-23 13:58:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:08,721 INFO L225 Difference]: With dead ends: 2080 [2022-11-23 13:58:08,721 INFO L226 Difference]: Without dead ends: 1623 [2022-11-23 13:58:08,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:58:08,723 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 293 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:08,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1330 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:58:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-11-23 13:58:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1589. [2022-11-23 13:58:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1208 states have (on average 1.336092715231788) internal successors, (1614), 1220 states have internal predecessors, (1614), 229 states have call successors, (229), 145 states have call predecessors, (229), 150 states have return successors, (294), 225 states have call predecessors, (294), 228 states have call successors, (294) [2022-11-23 13:58:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2137 transitions. [2022-11-23 13:58:08,948 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2137 transitions. Word has length 113 [2022-11-23 13:58:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:08,949 INFO L495 AbstractCegarLoop]: Abstraction has 1589 states and 2137 transitions. [2022-11-23 13:58:08,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:58:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2137 transitions. [2022-11-23 13:58:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 13:58:08,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:08,952 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:08,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:09,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 13:58:09,168 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:09,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1127335012, now seen corresponding path program 1 times [2022-11-23 13:58:09,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:09,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251496453] [2022-11-23 13:58:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:09,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 13:58:10,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251496453] [2022-11-23 13:58:10,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251496453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496564267] [2022-11-23 13:58:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:10,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:10,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:10,106 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:10,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 13:58:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:10,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 13:58:10,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:58:11,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 13:58:13,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496564267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:13,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [966269492] [2022-11-23 13:58:13,035 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-23 13:58:13,035 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:58:13,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:58:13,035 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:58:13,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:59:36,189 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 344 for LOIs [2022-11-23 13:59:37,049 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 296 for LOIs [2022-11-23 13:59:37,167 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 289 for LOIs [2022-11-23 13:59:37,327 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 356 for LOIs [2022-11-23 13:59:40,940 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 204 for LOIs [2022-11-23 13:59:41,407 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 153 for LOIs [2022-11-23 13:59:41,856 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 348 for LOIs [2022-11-23 13:59:42,712 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 371 for LOIs [2022-11-23 13:59:44,058 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:00:14,129 WARN L233 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 298 DAG size of output: 230 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:00:19,836 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 300 DAG size of output: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:00:44,238 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 311 DAG size of output: 244 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:00:52,405 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 317 DAG size of output: 246 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:00:58,556 WARN L233 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 323 DAG size of output: 252 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:01:04,751 WARN L233 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 325 DAG size of output: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:01:33,150 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 327 DAG size of output: 256 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:01:35,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74040#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t10_i~0 0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (= ~E_3~0 2) (<= ~t7_pc~0 0) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~T8_E~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~t9_st~0 0) (= ~E_2~0 2) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~p_last_write~0 2147483647) (<= 2 ~T9_E~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= ~t7_st~0 0) (= 0 ~t2_st~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:01:35,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:01:35,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:01:35,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-23 14:01:35,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706238128] [2022-11-23 14:01:35,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:01:35,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 14:01:35,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:01:35,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 14:01:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=10150, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 14:01:35,193 INFO L87 Difference]: Start difference. First operand 1589 states and 2137 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 14:01:58,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:01:58,247 INFO L93 Difference]: Finished difference Result 3879 states and 4791 transitions. [2022-11-23 14:01:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-23 14:01:58,248 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-23 14:01:58,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:01:58,260 INFO L225 Difference]: With dead ends: 3879 [2022-11-23 14:01:58,260 INFO L226 Difference]: Without dead ends: 3164 [2022-11-23 14:01:58,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 288 SyntacticMatches, 6 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40806 ImplicationChecksByTransitivity, 129.0s TimeCoverageRelationStatistics Valid=9166, Invalid=89744, Unknown=0, NotChecked=0, Total=98910 [2022-11-23 14:01:58,278 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 6685 mSDsluCounter, 2894 mSDsCounter, 0 mSdLazyCounter, 7101 mSolverCounterSat, 3188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6688 SdHoareTripleChecker+Valid, 3136 SdHoareTripleChecker+Invalid, 10289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3188 IncrementalHoareTripleChecker+Valid, 7101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:01:58,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6688 Valid, 3136 Invalid, 10289 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3188 Valid, 7101 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-23 14:01:58,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2022-11-23 14:01:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 1865. [2022-11-23 14:01:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1392 states have (on average 1.3110632183908046) internal successors, (1825), 1406 states have internal predecessors, (1825), 274 states have call successors, (274), 182 states have call predecessors, (274), 197 states have return successors, (351), 278 states have call predecessors, (351), 273 states have call successors, (351) [2022-11-23 14:01:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2450 transitions. [2022-11-23 14:01:58,574 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2450 transitions. Word has length 114 [2022-11-23 14:01:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:01:58,575 INFO L495 AbstractCegarLoop]: Abstraction has 1865 states and 2450 transitions. [2022-11-23 14:01:58,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 14:01:58,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2450 transitions. [2022-11-23 14:01:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 14:01:58,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:01:58,578 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:01:58,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:01:58,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:01:58,784 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:01:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:01:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash 311050717, now seen corresponding path program 1 times [2022-11-23 14:01:58,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:01:58,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259253504] [2022-11-23 14:01:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:58,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:01:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:01:59,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:01:59,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259253504] [2022-11-23 14:01:59,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259253504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:01:59,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891233549] [2022-11-23 14:01:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:59,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:59,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:01:59,147 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:01:59,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:01:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:59,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:01:59,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:01:59,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:01:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:01:59,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891233549] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:01:59,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:01:59,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-23 14:01:59,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765159192] [2022-11-23 14:01:59,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:01:59,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:01:59,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:01:59,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:01:59,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:01:59,608 INFO L87 Difference]: Start difference. First operand 1865 states and 2450 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:02:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:02:00,756 INFO L93 Difference]: Finished difference Result 3189 states and 3998 transitions. [2022-11-23 14:02:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:02:00,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-23 14:02:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:02:00,766 INFO L225 Difference]: With dead ends: 3189 [2022-11-23 14:02:00,766 INFO L226 Difference]: Without dead ends: 2198 [2022-11-23 14:02:00,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:02:00,769 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 457 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:02:00,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 845 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:02:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2022-11-23 14:02:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 1945. [2022-11-23 14:02:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1437 states have (on average 1.3054975643702158) internal successors, (1876), 1454 states have internal predecessors, (1876), 293 states have call successors, (293), 191 states have call predecessors, (293), 213 states have return successors, (391), 301 states have call predecessors, (391), 292 states have call successors, (391) [2022-11-23 14:02:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2560 transitions. [2022-11-23 14:02:01,160 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2560 transitions. Word has length 115 [2022-11-23 14:02:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:02:01,161 INFO L495 AbstractCegarLoop]: Abstraction has 1945 states and 2560 transitions. [2022-11-23 14:02:01,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:02:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2560 transitions. [2022-11-23 14:02:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 14:02:01,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:02:01,166 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:02:01,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:02:01,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:02:01,378 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:02:01,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:02:01,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1020041176, now seen corresponding path program 1 times [2022-11-23 14:02:01,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:02:01,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168441513] [2022-11-23 14:02:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:02:01,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:02:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:02:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:02:02,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:02:02,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168441513] [2022-11-23 14:02:02,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168441513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:02:02,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396841517] [2022-11-23 14:02:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:02:02,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:02:02,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:02:02,133 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:02:02,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:02:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:02:02,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-23 14:02:02,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:02:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:02:03,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:02:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:02:04,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396841517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:02:04,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1700080112] [2022-11-23 14:02:04,923 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-23 14:02:04,923 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:02:04,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:02:04,924 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:02:04,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:02:42,867 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 279 for LOIs [2022-11-23 14:02:42,982 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 282 for LOIs [2022-11-23 14:02:43,101 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 140 for LOIs [2022-11-23 14:02:43,116 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 279 for LOIs [2022-11-23 14:02:44,365 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 279 for LOIs [2022-11-23 14:02:45,053 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 140 for LOIs [2022-11-23 14:02:45,460 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 279 for LOIs [2022-11-23 14:02:45,577 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 289 for LOIs [2022-11-23 14:02:45,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:04:14,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '91845#(and (= ~q_req_up~0 1) (or (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0)) (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (<= ~t4_pc~0 0) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0))' at error location [2022-11-23 14:04:14,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:04:14,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:04:14,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-23 14:04:14,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008901472] [2022-11-23 14:04:14,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:04:14,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 14:04:14,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:14,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 14:04:14,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=9107, Unknown=0, NotChecked=0, Total=9900 [2022-11-23 14:04:14,426 INFO L87 Difference]: Start difference. First operand 1945 states and 2560 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 14:04:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:23,483 INFO L93 Difference]: Finished difference Result 4794 states and 5902 transitions. [2022-11-23 14:04:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-23 14:04:23,484 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-23 14:04:23,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:23,495 INFO L225 Difference]: With dead ends: 4794 [2022-11-23 14:04:23,495 INFO L226 Difference]: Without dead ends: 3723 [2022-11-23 14:04:23,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 295 SyntacticMatches, 27 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16072 ImplicationChecksByTransitivity, 93.7s TimeCoverageRelationStatistics Valid=3560, Invalid=29746, Unknown=0, NotChecked=0, Total=33306 [2022-11-23 14:04:23,501 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 5568 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 5024 mSolverCounterSat, 2881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5569 SdHoareTripleChecker+Valid, 2226 SdHoareTripleChecker+Invalid, 7905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2881 IncrementalHoareTripleChecker+Valid, 5024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:23,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5569 Valid, 2226 Invalid, 7905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2881 Valid, 5024 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-23 14:04:23,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-11-23 14:04:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 2482. [2022-11-23 14:04:24,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 1823 states have (on average 1.2753702687877126) internal successors, (2325), 1840 states have internal predecessors, (2325), 367 states have call successors, (367), 250 states have call predecessors, (367), 290 states have return successors, (483), 393 states have call predecessors, (483), 366 states have call successors, (483) [2022-11-23 14:04:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3175 transitions. [2022-11-23 14:04:24,045 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3175 transitions. Word has length 124 [2022-11-23 14:04:24,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:24,045 INFO L495 AbstractCegarLoop]: Abstraction has 2482 states and 3175 transitions. [2022-11-23 14:04:24,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 14:04:24,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3175 transitions. [2022-11-23 14:04:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 14:04:24,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:24,048 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:04:24,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:24,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:24,255 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:24,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1098357173, now seen corresponding path program 1 times [2022-11-23 14:04:24,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:24,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144380569] [2022-11-23 14:04:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:24,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 14:04:24,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:24,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144380569] [2022-11-23 14:04:24,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144380569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:24,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460407421] [2022-11-23 14:04:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:24,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:24,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:24,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:24,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:04:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:24,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:04:24,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:04:24,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:04:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:04:24,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460407421] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:24,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:04:24,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-23 14:04:24,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494359586] [2022-11-23 14:04:24,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:24,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:04:24,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:04:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:04:24,983 INFO L87 Difference]: Start difference. First operand 2482 states and 3175 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:04:26,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:26,183 INFO L93 Difference]: Finished difference Result 3441 states and 4266 transitions. [2022-11-23 14:04:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:04:26,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-23 14:04:26,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:26,191 INFO L225 Difference]: With dead ends: 3441 [2022-11-23 14:04:26,191 INFO L226 Difference]: Without dead ends: 1833 [2022-11-23 14:04:26,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:04:26,195 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 674 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:26,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 672 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:04:26,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2022-11-23 14:04:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1492. [2022-11-23 14:04:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1126 states have (on average 1.3348134991119005) internal successors, (1503), 1142 states have internal predecessors, (1503), 217 states have call successors, (217), 129 states have call predecessors, (217), 147 states have return successors, (300), 222 states have call predecessors, (300), 216 states have call successors, (300) [2022-11-23 14:04:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2020 transitions. [2022-11-23 14:04:26,466 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2020 transitions. Word has length 125 [2022-11-23 14:04:26,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:26,467 INFO L495 AbstractCegarLoop]: Abstraction has 1492 states and 2020 transitions. [2022-11-23 14:04:26,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:04:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2020 transitions. [2022-11-23 14:04:26,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 14:04:26,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:26,471 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:04:26,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:26,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:26,677 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:26,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:26,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2114417611, now seen corresponding path program 1 times [2022-11-23 14:04:26,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:26,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94432902] [2022-11-23 14:04:26,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:26,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:04:26,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:26,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94432902] [2022-11-23 14:04:26,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94432902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:26,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141305724] [2022-11-23 14:04:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:26,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:26,809 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:26,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:04:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:27,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:04:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 14:04:27,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:04:27,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141305724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:27,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:04:27,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:04:27,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497134011] [2022-11-23 14:04:27,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:27,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:27,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:27,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:04:27,065 INFO L87 Difference]: Start difference. First operand 1492 states and 2020 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 14:04:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:27,615 INFO L93 Difference]: Finished difference Result 2990 states and 4510 transitions. [2022-11-23 14:04:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:04:27,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 122 [2022-11-23 14:04:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:27,624 INFO L225 Difference]: With dead ends: 2990 [2022-11-23 14:04:27,624 INFO L226 Difference]: Without dead ends: 2233 [2022-11-23 14:04:27,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 14:04:27,628 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 306 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:27,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:04:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2022-11-23 14:04:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 2226. [2022-11-23 14:04:28,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 1738 states have (on average 1.3958573072497122) internal successors, (2426), 1757 states have internal predecessors, (2426), 309 states have call successors, (309), 159 states have call predecessors, (309), 177 states have return successors, (442), 311 states have call predecessors, (442), 308 states have call successors, (442) [2022-11-23 14:04:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3177 transitions. [2022-11-23 14:04:28,014 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3177 transitions. Word has length 122 [2022-11-23 14:04:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:28,014 INFO L495 AbstractCegarLoop]: Abstraction has 2226 states and 3177 transitions. [2022-11-23 14:04:28,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 14:04:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3177 transitions. [2022-11-23 14:04:28,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 14:04:28,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:28,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:04:28,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-23 14:04:28,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:28,224 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1502817749, now seen corresponding path program 1 times [2022-11-23 14:04:28,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:28,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285097218] [2022-11-23 14:04:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:28,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:04:28,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:28,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285097218] [2022-11-23 14:04:28,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285097218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:28,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12071521] [2022-11-23 14:04:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:28,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:28,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:28,337 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:28,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:04:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:28,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:04:28,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:04:28,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:04:28,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12071521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:28,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:04:28,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:04:28,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863599470] [2022-11-23 14:04:28,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:28,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:28,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:28,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:04:28,597 INFO L87 Difference]: Start difference. First operand 2226 states and 3177 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 14:04:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:29,279 INFO L93 Difference]: Finished difference Result 5177 states and 8055 transitions. [2022-11-23 14:04:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:04:29,280 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 122 [2022-11-23 14:04:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:29,292 INFO L225 Difference]: With dead ends: 5177 [2022-11-23 14:04:29,292 INFO L226 Difference]: Without dead ends: 3686 [2022-11-23 14:04:29,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 14:04:29,298 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 309 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:29,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:04:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2022-11-23 14:04:29,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 3674. [2022-11-23 14:04:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 2947 states have (on average 1.4394299287410925) internal successors, (4242), 2972 states have internal predecessors, (4242), 488 states have call successors, (488), 219 states have call predecessors, (488), 237 states have return successors, (717), 484 states have call predecessors, (717), 487 states have call successors, (717) [2022-11-23 14:04:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5447 transitions. [2022-11-23 14:04:29,799 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5447 transitions. Word has length 122 [2022-11-23 14:04:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:29,800 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5447 transitions. [2022-11-23 14:04:29,800 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 14:04:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5447 transitions. [2022-11-23 14:04:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 14:04:29,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:29,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:04:29,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:30,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 14:04:30,014 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1831970869, now seen corresponding path program 1 times [2022-11-23 14:04:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:30,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129439568] [2022-11-23 14:04:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:04:30,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:30,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129439568] [2022-11-23 14:04:30,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129439568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:30,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588952280] [2022-11-23 14:04:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:30,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:30,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:30,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:30,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:04:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:30,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:04:30,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:04:30,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:04:30,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588952280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:30,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:04:30,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:04:30,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375582383] [2022-11-23 14:04:30,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:30,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:30,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:30,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:30,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:04:30,451 INFO L87 Difference]: Start difference. First operand 3674 states and 5447 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 14:04:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:31,598 INFO L93 Difference]: Finished difference Result 9491 states and 15004 transitions. [2022-11-23 14:04:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:04:31,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 122 [2022-11-23 14:04:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:31,624 INFO L225 Difference]: With dead ends: 9491 [2022-11-23 14:04:31,624 INFO L226 Difference]: Without dead ends: 6552 [2022-11-23 14:04:31,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 14:04:31,637 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 294 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:31,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 493 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:04:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2022-11-23 14:04:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 6530. [2022-11-23 14:04:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6530 states, 5335 states have (on average 1.4646672914714152) internal successors, (7814), 5372 states have internal predecessors, (7814), 836 states have call successors, (836), 339 states have call predecessors, (836), 357 states have return successors, (1249), 820 states have call predecessors, (1249), 835 states have call successors, (1249) [2022-11-23 14:04:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6530 states to 6530 states and 9899 transitions. [2022-11-23 14:04:32,484 INFO L78 Accepts]: Start accepts. Automaton has 6530 states and 9899 transitions. Word has length 122 [2022-11-23 14:04:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:32,485 INFO L495 AbstractCegarLoop]: Abstraction has 6530 states and 9899 transitions. [2022-11-23 14:04:32,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 14:04:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 6530 states and 9899 transitions. [2022-11-23 14:04:32,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 14:04:32,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:32,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:04:32,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:32,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 14:04:32,708 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:32,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1418085931, now seen corresponding path program 1 times [2022-11-23 14:04:32,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:32,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096688073] [2022-11-23 14:04:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:04:32,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:32,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096688073] [2022-11-23 14:04:32,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096688073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:32,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434283834] [2022-11-23 14:04:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:32,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:32,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:32,823 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:32,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:04:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:33,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:04:33,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:04:33,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:04:33,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434283834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:33,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:04:33,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:04:33,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744246577] [2022-11-23 14:04:33,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:33,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:33,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:33,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:33,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:04:33,106 INFO L87 Difference]: Start difference. First operand 6530 states and 9899 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 14:04:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:34,972 INFO L93 Difference]: Finished difference Result 17999 states and 28620 transitions. [2022-11-23 14:04:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:04:34,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 122 [2022-11-23 14:04:34,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:35,022 INFO L225 Difference]: With dead ends: 17999 [2022-11-23 14:04:35,022 INFO L226 Difference]: Without dead ends: 12204 [2022-11-23 14:04:35,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 14:04:35,046 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 300 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:35,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 493 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:04:35,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12204 states. [2022-11-23 14:04:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12204 to 12162. [2022-11-23 14:04:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12162 states, 10051 states have (on average 1.4762710178091731) internal successors, (14838), 10112 states have internal predecessors, (14838), 1512 states have call successors, (1512), 579 states have call predecessors, (1512), 597 states have return successors, (2277), 1472 states have call predecessors, (2277), 1511 states have call successors, (2277) [2022-11-23 14:04:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12162 states to 12162 states and 18627 transitions. [2022-11-23 14:04:36,717 INFO L78 Accepts]: Start accepts. Automaton has 12162 states and 18627 transitions. Word has length 122 [2022-11-23 14:04:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:36,717 INFO L495 AbstractCegarLoop]: Abstraction has 12162 states and 18627 transitions. [2022-11-23 14:04:36,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 14:04:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 12162 states and 18627 transitions. [2022-11-23 14:04:36,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 14:04:36,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:36,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:04:36,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:36,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 14:04:36,943 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:36,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1838551925, now seen corresponding path program 1 times [2022-11-23 14:04:36,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:36,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303663213] [2022-11-23 14:04:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:36,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:04:37,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:37,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303663213] [2022-11-23 14:04:37,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303663213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:04:37,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241742739] [2022-11-23 14:04:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:37,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:04:37,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:37,096 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:04:37,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 14:04:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:37,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:04:37,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:04:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:04:37,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:04:37,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241742739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:37,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:04:37,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:04:37,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097120526] [2022-11-23 14:04:37,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:37,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:37,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:37,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:37,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:04:37,476 INFO L87 Difference]: Start difference. First operand 12162 states and 18627 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 14:04:41,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:41,036 INFO L93 Difference]: Finished difference Result 34775 states and 55288 transitions. [2022-11-23 14:04:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:04:41,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 122 [2022-11-23 14:04:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:41,154 INFO L225 Difference]: With dead ends: 34775 [2022-11-23 14:04:41,155 INFO L226 Difference]: Without dead ends: 23348 [2022-11-23 14:04:41,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 14:04:41,204 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 288 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:41,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 493 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:04:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23348 states. [2022-11-23 14:04:45,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23348 to 23266. [2022-11-23 14:04:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23266 states, 19363 states have (on average 1.4794195114393431) internal successors, (28646), 19472 states have internal predecessors, (28646), 2824 states have call successors, (2824), 1059 states have call predecessors, (2824), 1077 states have return successors, (4261), 2736 states have call predecessors, (4261), 2823 states have call successors, (4261) [2022-11-23 14:04:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23266 states to 23266 states and 35731 transitions. [2022-11-23 14:04:45,383 INFO L78 Accepts]: Start accepts. Automaton has 23266 states and 35731 transitions. Word has length 122 [2022-11-23 14:04:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:04:45,384 INFO L495 AbstractCegarLoop]: Abstraction has 23266 states and 35731 transitions. [2022-11-23 14:04:45,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 14:04:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 23266 states and 35731 transitions. [2022-11-23 14:04:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 14:04:45,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:45,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:04:45,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 14:04:45,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ba055a-ec0f-4708-8c89-4095b69a9ead/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 14:04:45,625 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1053565675, now seen corresponding path program 1 times [2022-11-23 14:04:45,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:45,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443022773] [2022-11-23 14:04:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:45,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 14:04:46,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:46,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443022773] [2022-11-23 14:04:46,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443022773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:46,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:04:46,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:04:46,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722067020] [2022-11-23 14:04:46,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:46,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:04:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:04:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:04:46,161 INFO L87 Difference]: Start difference. First operand 23266 states and 35731 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:04:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:04:55,608 INFO L93 Difference]: Finished difference Result 77766 states and 121286 transitions. [2022-11-23 14:04:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:04:55,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2022-11-23 14:04:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:04:55,892 INFO L225 Difference]: With dead ends: 77766 [2022-11-23 14:04:55,892 INFO L226 Difference]: Without dead ends: 55236 [2022-11-23 14:04:55,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:04:55,977 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1012 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:04:55,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1041 Valid, 747 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:04:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55236 states. [2022-11-23 14:05:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55236 to 44834. [2022-11-23 14:05:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44834 states, 37427 states have (on average 1.4775963876345954) internal successors, (55302), 37632 states have internal predecessors, (55302), 5368 states have call successors, (5368), 2019 states have call predecessors, (5368), 2037 states have return successors, (8085), 5184 states have call predecessors, (8085), 5367 states have call successors, (8085) [2022-11-23 14:05:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44834 states to 44834 states and 68755 transitions. [2022-11-23 14:05:03,748 INFO L78 Accepts]: Start accepts. Automaton has 44834 states and 68755 transitions. Word has length 122 [2022-11-23 14:05:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:03,748 INFO L495 AbstractCegarLoop]: Abstraction has 44834 states and 68755 transitions. [2022-11-23 14:05:03,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:05:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 44834 states and 68755 transitions. [2022-11-23 14:05:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 14:05:03,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:03,803 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:03,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-23 14:05:03,804 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:03,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1450149186, now seen corresponding path program 1 times [2022-11-23 14:05:03,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:03,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27842204] [2022-11-23 14:05:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:03,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 14:05:04,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:04,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27842204] [2022-11-23 14:05:04,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27842204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:04,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:04,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:05:04,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305765385] [2022-11-23 14:05:04,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:04,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:05:04,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:04,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:05:04,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:05:04,207 INFO L87 Difference]: Start difference. First operand 44834 states and 68755 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)