./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0 --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 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 --- 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-e04fb08 [2022-11-16 19:45:29,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:45:29,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:45:29,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:45:29,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:45:29,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:45:29,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:45:29,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:45:29,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:45:29,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:45:29,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:45:29,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:45:29,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:45:29,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:45:29,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:45:29,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:45:29,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:45:29,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:45:29,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:45:29,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:45:29,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:45:29,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:45:29,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:45:29,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:45:29,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:45:29,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:45:29,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:45:29,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:45:29,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:45:29,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:45:29,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:45:29,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:45:29,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:45:29,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:45:29,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:45:29,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:45:29,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:45:29,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:45:29,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:45:29,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:45:29,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:45:29,383 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:45:29,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:45:29,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:45:29,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:45:29,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:45:29,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:45:29,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:45:29,425 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:45:29,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:45:29,426 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:45:29,426 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:45:29,427 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:45:29,427 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:45:29,428 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:45:29,428 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:45:29,428 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:45:29,428 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:45:29,429 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:45:29,429 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:45:29,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:45:29,430 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:45:29,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:45:29,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:45:29,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:45:29,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:45:29,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:45:29,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:45:29,434 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:45:29,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:45:29,434 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:45:29,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:45:29,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:45:29,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:45:29,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:45:29,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:45:29,436 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:45:29,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:45:29,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:45:29,437 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:45:29,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:45:29,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:45:29,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:45:29,437 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_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 [2022-11-16 19:45:29,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:45:29,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:45:29,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:45:29,854 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:45:29,855 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:45:29,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-16 19:45:29,938 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/data/89822fe73/5951bee860f54f62b9a58f35353ac782/FLAG10e22944c [2022-11-16 19:45:30,467 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:45:30,476 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-16 19:45:30,496 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/data/89822fe73/5951bee860f54f62b9a58f35353ac782/FLAG10e22944c [2022-11-16 19:45:30,791 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/data/89822fe73/5951bee860f54f62b9a58f35353ac782 [2022-11-16 19:45:30,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:45:30,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:45:30,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:45:30,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:45:30,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:45:30,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:45:30" (1/1) ... [2022-11-16 19:45:30,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f9494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:30, skipping insertion in model container [2022-11-16 19:45:30,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:45:30" (1/1) ... [2022-11-16 19:45:30,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:45:30,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:45:31,056 WARN L229 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_926d8228-ecdd-4f90-8786-a24de4f5fe98/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2022-11-16 19:45:31,147 WARN L229 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_926d8228-ecdd-4f90-8786-a24de4f5fe98/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2022-11-16 19:45:31,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:45:31,258 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:45:31,280 WARN L229 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_926d8228-ecdd-4f90-8786-a24de4f5fe98/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2022-11-16 19:45:31,311 WARN L229 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_926d8228-ecdd-4f90-8786-a24de4f5fe98/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2022-11-16 19:45:31,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:45:31,381 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:45:31,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31 WrapperNode [2022-11-16 19:45:31,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:45:31,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:45:31,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:45:31,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:45:31,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (1/1) ... [2022-11-16 19:45:31,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (1/1) ... [2022-11-16 19:45:31,475 INFO L138 Inliner]: procedures = 59, calls = 66, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 518 [2022-11-16 19:45:31,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:45:31,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:45:31,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:45:31,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:45:31,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (1/1) ... [2022-11-16 19:45:31,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (1/1) ... [2022-11-16 19:45:31,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (1/1) ... [2022-11-16 19:45:31,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (1/1) ... [2022-11-16 19:45:31,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (1/1) ... [2022-11-16 19:45:31,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (1/1) ... [2022-11-16 19:45:31,542 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (1/1) ... [2022-11-16 19:45:31,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (1/1) ... [2022-11-16 19:45:31,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:45:31,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:45:31,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:45:31,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:45:31,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (1/1) ... [2022-11-16 19:45:31,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:45:31,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:45:31,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:45:31,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:45:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:45:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 19:45:31,655 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 19:45:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-16 19:45:31,655 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-16 19:45:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-16 19:45:31,656 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-16 19:45:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-16 19:45:31,656 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-16 19:45:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-16 19:45:31,656 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-16 19:45:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-16 19:45:31,657 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-16 19:45:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-16 19:45:31,657 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-16 19:45:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-16 19:45:31,657 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-16 19:45:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-16 19:45:31,658 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-16 19:45:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-16 19:45:31,658 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-16 19:45:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-16 19:45:31,658 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-16 19:45:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:45:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-16 19:45:31,659 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-16 19:45:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-16 19:45:31,660 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-16 19:45:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:45:31,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:45:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-16 19:45:31,661 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-16 19:45:31,805 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:45:31,808 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:45:32,477 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:45:32,826 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:45:32,826 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-16 19:45:32,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:45:32 BoogieIcfgContainer [2022-11-16 19:45:32,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:45:32,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:45:32,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:45:32,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:45:32,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:45:30" (1/3) ... [2022-11-16 19:45:32,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7465b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:45:32, skipping insertion in model container [2022-11-16 19:45:32,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:45:31" (2/3) ... [2022-11-16 19:45:32,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7465b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:45:32, skipping insertion in model container [2022-11-16 19:45:32,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:45:32" (3/3) ... [2022-11-16 19:45:32,841 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-16 19:45:32,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:45:32,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 19:45:32,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:45:32,941 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;@24b2ea12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:45:32,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 19:45:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 113 states have (on average 1.4955752212389382) internal successors, (169), 119 states have internal predecessors, (169), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-16 19:45:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 19:45:32,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:32,966 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] [2022-11-16 19:45:32,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash -911236769, now seen corresponding path program 1 times [2022-11-16 19:45:32,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:32,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900609668] [2022-11-16 19:45:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:32,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:33,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:33,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900609668] [2022-11-16 19:45:33,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900609668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:33,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:45:33,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:45:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654606731] [2022-11-16 19:45:33,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:33,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:45:33,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:33,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:45:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:45:33,580 INFO L87 Difference]: Start difference. First operand has 161 states, 113 states have (on average 1.4955752212389382) internal successors, (169), 119 states have internal predecessors, (169), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2022-11-16 19:45:34,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:34,564 INFO L93 Difference]: Finished difference Result 623 states and 938 transitions. [2022-11-16 19:45:34,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:45:34,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 40 [2022-11-16 19:45:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:34,588 INFO L225 Difference]: With dead ends: 623 [2022-11-16 19:45:34,588 INFO L226 Difference]: Without dead ends: 457 [2022-11-16 19:45:34,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:45:34,597 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 631 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:34,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 648 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 19:45:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-16 19:45:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 446. [2022-11-16 19:45:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 327 states have (on average 1.4097859327217126) internal successors, (461), 334 states have internal predecessors, (461), 80 states have call successors, (80), 38 states have call predecessors, (80), 37 states have return successors, (104), 75 states have call predecessors, (104), 78 states have call successors, (104) [2022-11-16 19:45:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 645 transitions. [2022-11-16 19:45:34,692 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 645 transitions. Word has length 40 [2022-11-16 19:45:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:34,693 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 645 transitions. [2022-11-16 19:45:34,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2022-11-16 19:45:34,694 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 645 transitions. [2022-11-16 19:45:34,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 19:45:34,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:34,696 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] [2022-11-16 19:45:34,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:45:34,697 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1284385766, now seen corresponding path program 1 times [2022-11-16 19:45:34,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:34,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022393577] [2022-11-16 19:45:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:34,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:34,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:34,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022393577] [2022-11-16 19:45:34,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022393577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:34,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:45:34,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:45:34,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397933801] [2022-11-16 19:45:34,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:34,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:45:34,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:34,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:45:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:45:34,841 INFO L87 Difference]: Start difference. First operand 446 states and 645 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 19:45:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:35,149 INFO L93 Difference]: Finished difference Result 570 states and 807 transitions. [2022-11-16 19:45:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:45:35,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-16 19:45:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:35,158 INFO L225 Difference]: With dead ends: 570 [2022-11-16 19:45:35,159 INFO L226 Difference]: Without dead ends: 506 [2022-11-16 19:45:35,162 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 [2022-11-16 19:45:35,163 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 271 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:35,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 390 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:45:35,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-16 19:45:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 499. [2022-11-16 19:45:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 365 states have (on average 1.3917808219178083) internal successors, (508), 372 states have internal predecessors, (508), 88 states have call successors, (88), 45 states have call predecessors, (88), 44 states have return successors, (112), 83 states have call predecessors, (112), 86 states have call successors, (112) [2022-11-16 19:45:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 708 transitions. [2022-11-16 19:45:35,268 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 708 transitions. Word has length 45 [2022-11-16 19:45:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:35,268 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 708 transitions. [2022-11-16 19:45:35,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 19:45:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 708 transitions. [2022-11-16 19:45:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 19:45:35,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:35,281 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] [2022-11-16 19:45:35,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:45:35,281 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -365411143, now seen corresponding path program 1 times [2022-11-16 19:45:35,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:35,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539719403] [2022-11-16 19:45:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:35,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:35,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:35,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539719403] [2022-11-16 19:45:35,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539719403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:35,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:45:35,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 19:45:35,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735947378] [2022-11-16 19:45:35,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:35,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:45:35,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:45:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:45:35,658 INFO L87 Difference]: Start difference. First operand 499 states and 708 transitions. 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) [2022-11-16 19:45:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:36,441 INFO L93 Difference]: Finished difference Result 680 states and 929 transitions. [2022-11-16 19:45:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:45:36,441 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 [2022-11-16 19:45:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:36,449 INFO L225 Difference]: With dead ends: 680 [2022-11-16 19:45:36,450 INFO L226 Difference]: Without dead ends: 564 [2022-11-16 19:45:36,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:45:36,460 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 334 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:36,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 644 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 19:45:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-16 19:45:36,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 551. [2022-11-16 19:45:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 402 states have (on average 1.3805970149253732) internal successors, (555), 409 states have internal predecessors, (555), 96 states have call successors, (96), 52 states have call predecessors, (96), 51 states have return successors, (120), 91 states have call predecessors, (120), 94 states have call successors, (120) [2022-11-16 19:45:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 771 transitions. [2022-11-16 19:45:36,541 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 771 transitions. Word has length 45 [2022-11-16 19:45:36,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:36,542 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 771 transitions. [2022-11-16 19:45:36,542 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) [2022-11-16 19:45:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 771 transitions. [2022-11-16 19:45:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 19:45:36,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:36,544 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] [2022-11-16 19:45:36,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:45:36,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:36,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:36,545 INFO L85 PathProgramCache]: Analyzing trace with hash -471338478, now seen corresponding path program 1 times [2022-11-16 19:45:36,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:36,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287671500] [2022-11-16 19:45:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:36,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:36,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:36,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287671500] [2022-11-16 19:45:36,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287671500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:36,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:45:36,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:45:36,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728461029] [2022-11-16 19:45:36,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:36,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:45:36,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:45:36,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:45:36,600 INFO L87 Difference]: Start difference. First operand 551 states and 771 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) [2022-11-16 19:45:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:36,745 INFO L93 Difference]: Finished difference Result 879 states and 1177 transitions. [2022-11-16 19:45:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:45:36,746 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 [2022-11-16 19:45:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:36,751 INFO L225 Difference]: With dead ends: 879 [2022-11-16 19:45:36,751 INFO L226 Difference]: Without dead ends: 710 [2022-11-16 19:45:36,752 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 [2022-11-16 19:45:36,753 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 190 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:36,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 248 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:45:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-11-16 19:45:36,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 691. [2022-11-16 19:45:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 497 states have (on average 1.3380281690140845) internal successors, (665), 504 states have internal predecessors, (665), 120 states have call successors, (120), 73 states have call predecessors, (120), 72 states have return successors, (144), 115 states have call predecessors, (144), 118 states have call successors, (144) [2022-11-16 19:45:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 929 transitions. [2022-11-16 19:45:36,829 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 929 transitions. Word has length 46 [2022-11-16 19:45:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:36,830 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 929 transitions. [2022-11-16 19:45:36,830 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) [2022-11-16 19:45:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 929 transitions. [2022-11-16 19:45:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 19:45:36,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:36,832 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] [2022-11-16 19:45:36,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:45:36,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:36,833 INFO L85 PathProgramCache]: Analyzing trace with hash 449491853, now seen corresponding path program 1 times [2022-11-16 19:45:36,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:36,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755251903] [2022-11-16 19:45:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:36,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:36,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:36,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755251903] [2022-11-16 19:45:36,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755251903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:36,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:45:36,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:45:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11885327] [2022-11-16 19:45:36,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:36,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:45:36,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:36,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:45:36,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:45:36,918 INFO L87 Difference]: Start difference. First operand 691 states and 929 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) [2022-11-16 19:45:37,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:37,094 INFO L93 Difference]: Finished difference Result 1061 states and 1374 transitions. [2022-11-16 19:45:37,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:45:37,095 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 [2022-11-16 19:45:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:37,099 INFO L225 Difference]: With dead ends: 1061 [2022-11-16 19:45:37,099 INFO L226 Difference]: Without dead ends: 798 [2022-11-16 19:45:37,101 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 [2022-11-16 19:45:37,103 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 67 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:37,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 349 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:45:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-11-16 19:45:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 792. [2022-11-16 19:45:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 568 states have (on average 1.3257042253521127) internal successors, (753), 575 states have internal predecessors, (753), 136 states have call successors, (136), 87 states have call predecessors, (136), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2022-11-16 19:45:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1049 transitions. [2022-11-16 19:45:37,186 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1049 transitions. Word has length 47 [2022-11-16 19:45:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:37,187 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1049 transitions. [2022-11-16 19:45:37,188 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) [2022-11-16 19:45:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1049 transitions. [2022-11-16 19:45:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 19:45:37,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:37,191 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] [2022-11-16 19:45:37,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 19:45:37,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:37,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1236058268, now seen corresponding path program 1 times [2022-11-16 19:45:37,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:37,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285497303] [2022-11-16 19:45:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:37,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:37,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:37,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285497303] [2022-11-16 19:45:37,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285497303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:37,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:45:37,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:45:37,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186609091] [2022-11-16 19:45:37,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:37,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:45:37,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:45:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:45:37,321 INFO L87 Difference]: Start difference. First operand 792 states and 1049 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) [2022-11-16 19:45:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:37,610 INFO L93 Difference]: Finished difference Result 899 states and 1175 transitions. [2022-11-16 19:45:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:45:37,611 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 [2022-11-16 19:45:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:37,615 INFO L225 Difference]: With dead ends: 899 [2022-11-16 19:45:37,615 INFO L226 Difference]: Without dead ends: 896 [2022-11-16 19:45:37,616 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 [2022-11-16 19:45:37,621 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 344 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:37,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 231 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:45:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-11-16 19:45:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 791. [2022-11-16 19:45:37,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 568 states have (on average 1.3204225352112675) internal successors, (750), 574 states have internal predecessors, (750), 135 states have call successors, (135), 87 states have call predecessors, (135), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2022-11-16 19:45:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1045 transitions. [2022-11-16 19:45:37,708 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1045 transitions. Word has length 54 [2022-11-16 19:45:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:37,711 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1045 transitions. [2022-11-16 19:45:37,711 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) [2022-11-16 19:45:37,711 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1045 transitions. [2022-11-16 19:45:37,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 19:45:37,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:37,714 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] [2022-11-16 19:45:37,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 19:45:37,714 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:37,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:37,715 INFO L85 PathProgramCache]: Analyzing trace with hash 336125942, now seen corresponding path program 1 times [2022-11-16 19:45:37,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:37,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61794506] [2022-11-16 19:45:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:37,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:37,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:37,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61794506] [2022-11-16 19:45:37,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61794506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:45:37,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281694198] [2022-11-16 19:45:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:37,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:45:37,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:45:37,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:45:37,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:45:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:38,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:45:38,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:38,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:38,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281694198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:38,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634249328] [2022-11-16 19:45:38,713 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-16 19:45:38,713 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:45:38,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:45:38,724 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:45:38,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:45:41,752 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 115 for LOIs [2022-11-16 19:45:41,777 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 83 for LOIs [2022-11-16 19:45:41,786 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 111 for LOIs [2022-11-16 19:45:41,807 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 119 for LOIs [2022-11-16 19:45:42,230 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 115 for LOIs [2022-11-16 19:45:42,280 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 115 for LOIs [2022-11-16 19:45:42,330 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 115 for LOIs [2022-11-16 19:45:42,351 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 122 for LOIs [2022-11-16 19:45:42,372 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:45:54,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13061#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-16 19:45:54,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:45:54,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:45:54,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-16 19:45:54,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420202528] [2022-11-16 19:45:54,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:45:54,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:45:54,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:54,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:45:54,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 19:45:54,658 INFO L87 Difference]: Start difference. First operand 791 states and 1045 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 19:45:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:55,317 INFO L93 Difference]: Finished difference Result 1568 states and 1973 transitions. [2022-11-16 19:45:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:45:55,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-16 19:45:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:55,328 INFO L225 Difference]: With dead ends: 1568 [2022-11-16 19:45:55,328 INFO L226 Difference]: Without dead ends: 1565 [2022-11-16 19:45:55,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 19:45:55,331 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 455 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:55,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 807 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:45:55,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-11-16 19:45:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1191. [2022-11-16 19:45:55,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 848 states have (on average 1.294811320754717) internal successors, (1098), 854 states have internal predecessors, (1098), 199 states have call successors, (199), 143 states have call predecessors, (199), 142 states have return successors, (224), 195 states have call predecessors, (224), 198 states have call successors, (224) [2022-11-16 19:45:55,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1521 transitions. [2022-11-16 19:45:55,454 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1521 transitions. Word has length 55 [2022-11-16 19:45:55,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:55,454 INFO L495 AbstractCegarLoop]: Abstraction has 1191 states and 1521 transitions. [2022-11-16 19:45:55,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 19:45:55,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1521 transitions. [2022-11-16 19:45:55,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-16 19:45:55,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:55,457 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-16 19:45:55,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:55,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:45:55,664 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash 992874084, now seen corresponding path program 2 times [2022-11-16 19:45:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:55,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862669395] [2022-11-16 19:45:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:55,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:55,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862669395] [2022-11-16 19:45:55,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862669395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:55,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:45:55,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:45:55,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264529814] [2022-11-16 19:45:55,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:55,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:45:55,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:55,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:45:55,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:45:55,710 INFO L87 Difference]: Start difference. First operand 1191 states and 1521 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2022-11-16 19:45:55,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:55,912 INFO L93 Difference]: Finished difference Result 1608 states and 2018 transitions. [2022-11-16 19:45:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:45:55,913 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), 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 58 [2022-11-16 19:45:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:55,918 INFO L225 Difference]: With dead ends: 1608 [2022-11-16 19:45:55,918 INFO L226 Difference]: Without dead ends: 995 [2022-11-16 19:45:55,920 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 [2022-11-16 19:45:55,920 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 188 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:55,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 289 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:45:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-11-16 19:45:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 993. [2022-11-16 19:45:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 710 states have (on average 1.2901408450704226) internal successors, (916), 716 states have internal predecessors, (916), 167 states have call successors, (167), 115 states have call predecessors, (167), 114 states have return successors, (192), 163 states have call predecessors, (192), 166 states have call successors, (192) [2022-11-16 19:45:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1275 transitions. [2022-11-16 19:45:56,033 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1275 transitions. Word has length 58 [2022-11-16 19:45:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:56,034 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1275 transitions. [2022-11-16 19:45:56,034 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), 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) [2022-11-16 19:45:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1275 transitions. [2022-11-16 19:45:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 19:45:56,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:56,036 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] [2022-11-16 19:45:56,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 19:45:56,037 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1510064802, now seen corresponding path program 1 times [2022-11-16 19:45:56,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:56,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31999253] [2022-11-16 19:45:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:56,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:45:56,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:56,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31999253] [2022-11-16 19:45:56,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31999253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:56,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:45:56,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:45:56,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523353597] [2022-11-16 19:45:56,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:56,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:45:56,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:56,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:45:56,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:45:56,086 INFO L87 Difference]: Start difference. First operand 993 states and 1275 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) [2022-11-16 19:45:56,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:56,285 INFO L93 Difference]: Finished difference Result 1624 states and 2025 transitions. [2022-11-16 19:45:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:45:56,286 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 [2022-11-16 19:45:56,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:56,292 INFO L225 Difference]: With dead ends: 1624 [2022-11-16 19:45:56,292 INFO L226 Difference]: Without dead ends: 1249 [2022-11-16 19:45:56,294 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 [2022-11-16 19:45:56,295 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 43 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:56,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 389 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:45:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-11-16 19:45:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1068. [2022-11-16 19:45:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 771 states have (on average 1.2853437094682232) internal successors, (991), 777 states have internal predecessors, (991), 174 states have call successors, (174), 122 states have call predecessors, (174), 121 states have return successors, (199), 170 states have call predecessors, (199), 173 states have call successors, (199) [2022-11-16 19:45:56,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1364 transitions. [2022-11-16 19:45:56,429 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1364 transitions. Word has length 61 [2022-11-16 19:45:56,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:56,429 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1364 transitions. [2022-11-16 19:45:56,430 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) [2022-11-16 19:45:56,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1364 transitions. [2022-11-16 19:45:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 19:45:56,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:56,433 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-16 19:45:56,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 19:45:56,433 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:56,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:56,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1013883676, now seen corresponding path program 1 times [2022-11-16 19:45:56,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:56,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025489124] [2022-11-16 19:45:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:56,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:45:56,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:56,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025489124] [2022-11-16 19:45:56,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025489124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:56,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:45:56,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 19:45:56,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430893105] [2022-11-16 19:45:56,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:56,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:45:56,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:45:56,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:45:56,613 INFO L87 Difference]: Start difference. First operand 1068 states and 1364 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2022-11-16 19:45:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:57,393 INFO L93 Difference]: Finished difference Result 2121 states and 2579 transitions. [2022-11-16 19:45:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:45:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 70 [2022-11-16 19:45:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:57,403 INFO L225 Difference]: With dead ends: 2121 [2022-11-16 19:45:57,403 INFO L226 Difference]: Without dead ends: 1436 [2022-11-16 19:45:57,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:45:57,406 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 315 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:57,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 545 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:45:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2022-11-16 19:45:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1387. [2022-11-16 19:45:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 985 states have (on average 1.2527918781725889) internal successors, (1234), 991 states have internal predecessors, (1234), 230 states have call successors, (230), 171 states have call predecessors, (230), 170 states have return successors, (255), 226 states have call predecessors, (255), 229 states have call successors, (255) [2022-11-16 19:45:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1719 transitions. [2022-11-16 19:45:57,618 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1719 transitions. Word has length 70 [2022-11-16 19:45:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:57,620 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 1719 transitions. [2022-11-16 19:45:57,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2022-11-16 19:45:57,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1719 transitions. [2022-11-16 19:45:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 19:45:57,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:57,624 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] [2022-11-16 19:45:57,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 19:45:57,624 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:57,625 INFO L85 PathProgramCache]: Analyzing trace with hash -955459290, now seen corresponding path program 1 times [2022-11-16 19:45:57,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:57,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909706712] [2022-11-16 19:45:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:57,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:45:57,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:57,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909706712] [2022-11-16 19:45:57,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909706712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:57,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:45:57,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:45:57,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763029064] [2022-11-16 19:45:57,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:57,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:45:57,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:57,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:45:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:45:57,704 INFO L87 Difference]: Start difference. First operand 1387 states and 1719 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) [2022-11-16 19:45:57,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:57,960 INFO L93 Difference]: Finished difference Result 2359 states and 2847 transitions. [2022-11-16 19:45:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:45:57,961 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 [2022-11-16 19:45:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:57,968 INFO L225 Difference]: With dead ends: 2359 [2022-11-16 19:45:57,968 INFO L226 Difference]: Without dead ends: 1563 [2022-11-16 19:45:57,970 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 [2022-11-16 19:45:57,971 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 38 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:57,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 383 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:45:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-11-16 19:45:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1434. [2022-11-16 19:45:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1024 states have (on average 1.25390625) internal successors, (1284), 1030 states have internal predecessors, (1284), 234 states have call successors, (234), 175 states have call predecessors, (234), 174 states have return successors, (259), 230 states have call predecessors, (259), 233 states have call successors, (259) [2022-11-16 19:45:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1777 transitions. [2022-11-16 19:45:58,179 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1777 transitions. Word has length 71 [2022-11-16 19:45:58,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:58,179 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1777 transitions. [2022-11-16 19:45:58,179 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) [2022-11-16 19:45:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1777 transitions. [2022-11-16 19:45:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 19:45:58,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:58,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:45:58,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 19:45:58,187 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:58,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1468371616, now seen corresponding path program 1 times [2022-11-16 19:45:58,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:58,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078649200] [2022-11-16 19:45:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:58,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:45:58,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:58,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078649200] [2022-11-16 19:45:58,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078649200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:45:58,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911982026] [2022-11-16 19:45:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:58,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:45:58,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:45:58,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:45:58,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:45:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:58,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:45:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 19:45:58,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:45:58,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911982026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:58,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:45:58,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 19:45:58,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051690579] [2022-11-16 19:45:58,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:58,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:45:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:58,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:45:58,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:45:58,455 INFO L87 Difference]: Start difference. First operand 1434 states and 1777 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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) [2022-11-16 19:45:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:58,732 INFO L93 Difference]: Finished difference Result 2162 states and 2888 transitions. [2022-11-16 19:45:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:45:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 73 [2022-11-16 19:45:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:58,742 INFO L225 Difference]: With dead ends: 2162 [2022-11-16 19:45:58,742 INFO L226 Difference]: Without dead ends: 1790 [2022-11-16 19:45:58,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:45:58,747 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 184 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:58,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 280 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:45:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-11-16 19:45:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1783. [2022-11-16 19:45:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1286 states have (on average 1.280715396578538) internal successors, (1647), 1295 states have internal predecessors, (1647), 291 states have call successors, (291), 205 states have call predecessors, (291), 204 states have return successors, (338), 284 states have call predecessors, (338), 290 states have call successors, (338) [2022-11-16 19:45:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2276 transitions. [2022-11-16 19:45:58,999 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2276 transitions. Word has length 73 [2022-11-16 19:45:59,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:59,000 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2276 transitions. [2022-11-16 19:45:59,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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) [2022-11-16 19:45:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2276 transitions. [2022-11-16 19:45:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 19:45:59,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:59,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:45:59,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:59,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 19:45:59,210 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:45:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:59,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1974574050, now seen corresponding path program 1 times [2022-11-16 19:45:59,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:59,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182889716] [2022-11-16 19:45:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:59,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 19:45:59,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:59,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182889716] [2022-11-16 19:45:59,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182889716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:45:59,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:45:59,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:45:59,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748964649] [2022-11-16 19:45:59,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:45:59,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:45:59,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:59,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:45:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:45:59,552 INFO L87 Difference]: Start difference. First operand 1783 states and 2276 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-11-16 19:46:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:00,343 INFO L93 Difference]: Finished difference Result 2997 states and 4087 transitions. [2022-11-16 19:46:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:46:00,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 73 [2022-11-16 19:46:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:00,357 INFO L225 Difference]: With dead ends: 2997 [2022-11-16 19:46:00,357 INFO L226 Difference]: Without dead ends: 2277 [2022-11-16 19:46:00,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:46:00,362 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 400 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:00,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 446 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:46:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2022-11-16 19:46:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2191. [2022-11-16 19:46:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 1589 states have (on average 1.2945248584015103) internal successors, (2057), 1602 states have internal predecessors, (2057), 360 states have call successors, (360), 241 states have call predecessors, (360), 240 states have return successors, (440), 349 states have call predecessors, (440), 359 states have call successors, (440) [2022-11-16 19:46:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 2857 transitions. [2022-11-16 19:46:00,702 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 2857 transitions. Word has length 73 [2022-11-16 19:46:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:00,703 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 2857 transitions. [2022-11-16 19:46:00,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-11-16 19:46:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 2857 transitions. [2022-11-16 19:46:00,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 19:46:00,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:00,706 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:46:00,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 19:46:00,707 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:46:00,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:00,708 INFO L85 PathProgramCache]: Analyzing trace with hash -542680176, now seen corresponding path program 1 times [2022-11-16 19:46:00,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:46:00,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836599676] [2022-11-16 19:46:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:00,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:46:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 19:46:00,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:46:00,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836599676] [2022-11-16 19:46:00,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836599676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:46:00,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:46:00,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:46:00,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11591327] [2022-11-16 19:46:00,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:46:00,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:46:00,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:46:00,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:46:00,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:46:00,816 INFO L87 Difference]: Start difference. First operand 2191 states and 2857 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 19:46:01,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:01,180 INFO L93 Difference]: Finished difference Result 3421 states and 4686 transitions. [2022-11-16 19:46:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:46:01,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-11-16 19:46:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:01,194 INFO L225 Difference]: With dead ends: 3421 [2022-11-16 19:46:01,195 INFO L226 Difference]: Without dead ends: 2435 [2022-11-16 19:46:01,199 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 [2022-11-16 19:46:01,200 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 46 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:01,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 403 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:46:01,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2022-11-16 19:46:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 2310. [2022-11-16 19:46:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2310 states, 1696 states have (on average 1.3142688679245282) internal successors, (2229), 1709 states have internal predecessors, (2229), 366 states have call successors, (366), 247 states have call predecessors, (366), 246 states have return successors, (446), 355 states have call predecessors, (446), 365 states have call successors, (446) [2022-11-16 19:46:01,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 3041 transitions. [2022-11-16 19:46:01,554 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 3041 transitions. Word has length 74 [2022-11-16 19:46:01,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:01,554 INFO L495 AbstractCegarLoop]: Abstraction has 2310 states and 3041 transitions. [2022-11-16 19:46:01,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 19:46:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 3041 transitions. [2022-11-16 19:46:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 19:46:01,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:01,560 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] [2022-11-16 19:46:01,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 19:46:01,561 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:46:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash -475164843, now seen corresponding path program 1 times [2022-11-16 19:46:01,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:46:01,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918222273] [2022-11-16 19:46:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:01,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:46:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 19:46:01,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:46:01,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918222273] [2022-11-16 19:46:01,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918222273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:46:01,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722732639] [2022-11-16 19:46:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:01,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:01,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:46:01,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:46:01,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:46:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:46:02,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:46:02,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:46:02,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722732639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:46:02,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:46:02,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-16 19:46:02,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170703592] [2022-11-16 19:46:02,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:46:02,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:46:02,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:46:02,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:46:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:46:02,202 INFO L87 Difference]: Start difference. First operand 2310 states and 3041 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) [2022-11-16 19:46:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:02,569 INFO L93 Difference]: Finished difference Result 3135 states and 4029 transitions. [2022-11-16 19:46:02,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:46:02,570 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 [2022-11-16 19:46:02,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:02,582 INFO L225 Difference]: With dead ends: 3135 [2022-11-16 19:46:02,582 INFO L226 Difference]: Without dead ends: 2339 [2022-11-16 19:46:02,585 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 [2022-11-16 19:46:02,586 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 46 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:02,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 389 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:46:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2022-11-16 19:46:02,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2306. [2022-11-16 19:46:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1692 states have (on average 1.2960992907801419) internal successors, (2193), 1705 states have internal predecessors, (2193), 366 states have call successors, (366), 247 states have call predecessors, (366), 246 states have return successors, (446), 355 states have call predecessors, (446), 365 states have call successors, (446) [2022-11-16 19:46:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3005 transitions. [2022-11-16 19:46:02,993 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3005 transitions. Word has length 102 [2022-11-16 19:46:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:02,993 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 3005 transitions. [2022-11-16 19:46:02,994 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) [2022-11-16 19:46:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3005 transitions. [2022-11-16 19:46:03,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 19:46:03,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:03,001 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] [2022-11-16 19:46:03,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:03,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 19:46:03,207 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:46:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:03,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1101392916, now seen corresponding path program 1 times [2022-11-16 19:46:03,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:46:03,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311385960] [2022-11-16 19:46:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:03,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:46:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 19:46:03,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:46:03,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311385960] [2022-11-16 19:46:03,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311385960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:46:03,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234196589] [2022-11-16 19:46:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:03,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:03,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:46:03,666 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:46:03,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:46:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:03,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 19:46:03,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:46:03,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:46:03,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234196589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:46:03,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:46:03,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-16 19:46:03,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379272065] [2022-11-16 19:46:03,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:46:03,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:46:03,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:46:03,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:46:03,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:46:03,898 INFO L87 Difference]: Start difference. First operand 2306 states and 3005 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) [2022-11-16 19:46:04,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:04,414 INFO L93 Difference]: Finished difference Result 3170 states and 4010 transitions. [2022-11-16 19:46:04,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:46:04,415 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 [2022-11-16 19:46:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:04,427 INFO L225 Difference]: With dead ends: 3170 [2022-11-16 19:46:04,427 INFO L226 Difference]: Without dead ends: 2123 [2022-11-16 19:46:04,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:46:04,430 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 182 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:04,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 823 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:46:04,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-11-16 19:46:04,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1938. [2022-11-16 19:46:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1455 states have (on average 1.3216494845360824) internal successors, (1923), 1468 states have internal predecessors, (1923), 295 states have call successors, (295), 187 states have call predecessors, (295), 186 states have return successors, (375), 284 states have call predecessors, (375), 294 states have call successors, (375) [2022-11-16 19:46:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2593 transitions. [2022-11-16 19:46:04,727 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2593 transitions. Word has length 102 [2022-11-16 19:46:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:04,727 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2593 transitions. [2022-11-16 19:46:04,728 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) [2022-11-16 19:46:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2593 transitions. [2022-11-16 19:46:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-16 19:46:04,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:04,734 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:46:04,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:04,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:04,941 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:46:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:04,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1860212688, now seen corresponding path program 1 times [2022-11-16 19:46:04,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:46:04,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463859753] [2022-11-16 19:46:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:04,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:46:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 19:46:05,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:46:05,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463859753] [2022-11-16 19:46:05,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463859753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:46:05,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:46:05,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:46:05,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459343479] [2022-11-16 19:46:05,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:46:05,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:46:05,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:46:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:46:05,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:46:05,009 INFO L87 Difference]: Start difference. First operand 1938 states and 2593 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 19:46:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:05,470 INFO L93 Difference]: Finished difference Result 4363 states and 6217 transitions. [2022-11-16 19:46:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:46:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2022-11-16 19:46:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:05,487 INFO L225 Difference]: With dead ends: 4363 [2022-11-16 19:46:05,488 INFO L226 Difference]: Without dead ends: 3115 [2022-11-16 19:46:05,493 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 [2022-11-16 19:46:05,494 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 178 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:05,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 278 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:46:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-11-16 19:46:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3091. [2022-11-16 19:46:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 2328 states have (on average 1.3354810996563573) internal successors, (3109), 2351 states have internal predecessors, (3109), 473 states have call successors, (473), 289 states have call predecessors, (473), 288 states have return successors, (620), 452 states have call predecessors, (620), 472 states have call successors, (620) [2022-11-16 19:46:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 4202 transitions. [2022-11-16 19:46:05,905 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 4202 transitions. Word has length 97 [2022-11-16 19:46:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:05,906 INFO L495 AbstractCegarLoop]: Abstraction has 3091 states and 4202 transitions. [2022-11-16 19:46:05,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 19:46:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 4202 transitions. [2022-11-16 19:46:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 19:46:05,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:05,917 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] [2022-11-16 19:46:05,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 19:46:05,917 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:46:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash 192220974, now seen corresponding path program 1 times [2022-11-16 19:46:05,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:46:05,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675107007] [2022-11-16 19:46:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:05,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:46:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 19:46:06,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:46:06,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675107007] [2022-11-16 19:46:06,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675107007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:46:06,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356767585] [2022-11-16 19:46:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:06,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:06,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:46:06,130 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:46:06,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:46:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:06,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:46:06,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:46:06,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:46:06,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356767585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:46:06,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:46:06,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-16 19:46:06,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389329381] [2022-11-16 19:46:06,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:46:06,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:46:06,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:46:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:46:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:46:06,366 INFO L87 Difference]: Start difference. First operand 3091 states and 4202 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) [2022-11-16 19:46:06,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:06,925 INFO L93 Difference]: Finished difference Result 3640 states and 4827 transitions. [2022-11-16 19:46:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:46:06,926 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 [2022-11-16 19:46:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:06,941 INFO L225 Difference]: With dead ends: 3640 [2022-11-16 19:46:06,941 INFO L226 Difference]: Without dead ends: 3047 [2022-11-16 19:46:06,945 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 [2022-11-16 19:46:06,945 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 67 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:06,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1012 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:46:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2022-11-16 19:46:07,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 2955. [2022-11-16 19:46:07,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2228 states have (on average 1.3429084380610412) internal successors, (2992), 2251 states have internal predecessors, (2992), 454 states have call successors, (454), 272 states have call predecessors, (454), 271 states have return successors, (601), 433 states have call predecessors, (601), 453 states have call successors, (601) [2022-11-16 19:46:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4047 transitions. [2022-11-16 19:46:07,434 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4047 transitions. Word has length 112 [2022-11-16 19:46:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:07,434 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 4047 transitions. [2022-11-16 19:46:07,434 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) [2022-11-16 19:46:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4047 transitions. [2022-11-16 19:46:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 19:46:07,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:07,443 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] [2022-11-16 19:46:07,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:07,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 19:46:07,649 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:46:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:07,649 INFO L85 PathProgramCache]: Analyzing trace with hash 188521773, now seen corresponding path program 1 times [2022-11-16 19:46:07,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:46:07,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960441277] [2022-11-16 19:46:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:07,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:46:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-16 19:46:07,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:46:07,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960441277] [2022-11-16 19:46:07,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960441277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:46:07,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427839013] [2022-11-16 19:46:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:07,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:07,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:46:07,856 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:46:07,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:46:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:07,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:46:07,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 19:46:08,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:46:08,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427839013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:46:08,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:46:08,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-16 19:46:08,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156467287] [2022-11-16 19:46:08,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:46:08,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:46:08,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:46:08,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:46:08,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:46:08,078 INFO L87 Difference]: Start difference. First operand 2955 states and 4047 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) [2022-11-16 19:46:08,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:08,654 INFO L93 Difference]: Finished difference Result 3704 states and 4892 transitions. [2022-11-16 19:46:08,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:46:08,655 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 [2022-11-16 19:46:08,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:08,670 INFO L225 Difference]: With dead ends: 3704 [2022-11-16 19:46:08,671 INFO L226 Difference]: Without dead ends: 3247 [2022-11-16 19:46:08,673 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 [2022-11-16 19:46:08,674 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 167 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:08,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 894 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:46:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2022-11-16 19:46:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3213. [2022-11-16 19:46:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 2390 states have (on average 1.3271966527196652) internal successors, (3172), 2419 states have internal predecessors, (3172), 502 states have call successors, (502), 314 states have call predecessors, (502), 319 states have return successors, (661), 481 states have call predecessors, (661), 501 states have call successors, (661) [2022-11-16 19:46:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 4335 transitions. [2022-11-16 19:46:08,988 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 4335 transitions. Word has length 113 [2022-11-16 19:46:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:08,988 INFO L495 AbstractCegarLoop]: Abstraction has 3213 states and 4335 transitions. [2022-11-16 19:46:08,988 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) [2022-11-16 19:46:08,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 4335 transitions. [2022-11-16 19:46:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-16 19:46:08,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:08,999 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] [2022-11-16 19:46:09,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:09,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:09,210 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:46:09,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:09,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1181390692, now seen corresponding path program 1 times [2022-11-16 19:46:09,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:46:09,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846413032] [2022-11-16 19:46:09,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:09,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:46:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 19:46:10,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:46:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846413032] [2022-11-16 19:46:10,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846413032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:46:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453216502] [2022-11-16 19:46:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:10,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:46:10,220 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:46:10,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:46:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:10,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 19:46:10,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:46:11,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:46:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:46:13,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453216502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:46:13,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1217277739] [2022-11-16 19:46:13,693 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-16 19:46:13,693 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:46:13,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:46:13,694 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:46:13,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:46:35,707 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 192 for LOIs [2022-11-16 19:46:35,994 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 143 for LOIs [2022-11-16 19:46:36,023 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 134 for LOIs [2022-11-16 19:46:36,054 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2022-11-16 19:46:37,354 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 122 for LOIs [2022-11-16 19:46:37,506 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 68 for LOIs [2022-11-16 19:46:37,621 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 196 for LOIs [2022-11-16 19:46:37,973 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2022-11-16 19:46:38,545 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:47:09,460 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '105537#(and (= ~q_req_up~0 1) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (<= 1 ~c_dr_st~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~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) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (= ~E_1~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-16 19:47:09,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:47:09,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:47:09,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-16 19:47:09,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547379982] [2022-11-16 19:47:09,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:47:09,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 19:47:09,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:09,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 19:47:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=10567, Unknown=0, NotChecked=0, Total=11342 [2022-11-16 19:47:09,465 INFO L87 Difference]: Start difference. First operand 3213 states and 4335 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-16 19:47:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:34,118 INFO L93 Difference]: Finished difference Result 5724 states and 7251 transitions. [2022-11-16 19:47:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-16 19:47:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-16 19:47:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:34,138 INFO L225 Difference]: With dead ends: 5724 [2022-11-16 19:47:34,138 INFO L226 Difference]: Without dead ends: 5009 [2022-11-16 19:47:34,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44526 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=10062, Invalid=99168, Unknown=0, NotChecked=0, Total=109230 [2022-11-16 19:47:34,160 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 4420 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 6815 mSolverCounterSat, 2480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4421 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 9295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2480 IncrementalHoareTripleChecker+Valid, 6815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:34,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4421 Valid, 2487 Invalid, 9295 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2480 Valid, 6815 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-16 19:47:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2022-11-16 19:47:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 3489. [2022-11-16 19:47:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3489 states, 2574 states have (on average 1.3142968142968143) internal successors, (3383), 2605 states have internal predecessors, (3383), 547 states have call successors, (547), 351 states have call predecessors, (547), 366 states have return successors, (718), 534 states have call predecessors, (718), 546 states have call successors, (718) [2022-11-16 19:47:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 4648 transitions. [2022-11-16 19:47:34,917 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 4648 transitions. Word has length 114 [2022-11-16 19:47:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:34,917 INFO L495 AbstractCegarLoop]: Abstraction has 3489 states and 4648 transitions. [2022-11-16 19:47:34,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-16 19:47:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 4648 transitions. [2022-11-16 19:47:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 19:47:34,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:34,929 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] [2022-11-16 19:47:34,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 19:47:35,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:35,137 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:47:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:35,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1339438238, now seen corresponding path program 1 times [2022-11-16 19:47:35,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:35,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495821833] [2022-11-16 19:47:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:35,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 19:47:35,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:35,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495821833] [2022-11-16 19:47:35,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495821833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:35,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134418977] [2022-11-16 19:47:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:35,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:35,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:35,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:35,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 19:47:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:35,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:47:35,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 19:47:35,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 19:47:36,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134418977] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:36,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:47:36,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-16 19:47:36,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248274940] [2022-11-16 19:47:36,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:47:36,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:47:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:36,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:47:36,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:47:36,059 INFO L87 Difference]: Start difference. First operand 3489 states and 4648 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) [2022-11-16 19:47:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:37,450 INFO L93 Difference]: Finished difference Result 4813 states and 6196 transitions. [2022-11-16 19:47:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:47:37,450 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 [2022-11-16 19:47:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:37,467 INFO L225 Difference]: With dead ends: 4813 [2022-11-16 19:47:37,467 INFO L226 Difference]: Without dead ends: 3822 [2022-11-16 19:47:37,472 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 [2022-11-16 19:47:37,473 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 303 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:37,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 436 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:47:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2022-11-16 19:47:38,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3569. [2022-11-16 19:47:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 2619 states have (on average 1.3111874761359297) internal successors, (3434), 2653 states have internal predecessors, (3434), 566 states have call successors, (566), 360 states have call predecessors, (566), 382 states have return successors, (758), 557 states have call predecessors, (758), 565 states have call successors, (758) [2022-11-16 19:47:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 4758 transitions. [2022-11-16 19:47:38,205 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 4758 transitions. Word has length 115 [2022-11-16 19:47:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:38,205 INFO L495 AbstractCegarLoop]: Abstraction has 3569 states and 4758 transitions. [2022-11-16 19:47:38,206 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) [2022-11-16 19:47:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 4758 transitions. [2022-11-16 19:47:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-16 19:47:38,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:38,217 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:38,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:38,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 19:47:38,424 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:47:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1765750631, now seen corresponding path program 1 times [2022-11-16 19:47:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:38,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780874606] [2022-11-16 19:47:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:38,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-16 19:47:38,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:38,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780874606] [2022-11-16 19:47:38,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780874606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:38,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183436668] [2022-11-16 19:47:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:38,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:38,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:38,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:38,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:47:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:38,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:47:38,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 19:47:38,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:47:38,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183436668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:47:38,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:47:38,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 19:47:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784937562] [2022-11-16 19:47:38,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:47:38,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:47:38,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:47:38,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:47:38,753 INFO L87 Difference]: Start difference. First operand 3569 states and 4758 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:47:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:39,758 INFO L93 Difference]: Finished difference Result 5931 states and 8159 transitions. [2022-11-16 19:47:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:47:39,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-16 19:47:39,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:39,778 INFO L225 Difference]: With dead ends: 5931 [2022-11-16 19:47:39,778 INFO L226 Difference]: Without dead ends: 4157 [2022-11-16 19:47:39,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:47:39,788 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 179 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:39,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 211 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:47:39,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2022-11-16 19:47:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 4069. [2022-11-16 19:47:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4069 states, 3050 states have (on average 1.3) internal successors, (3965), 3080 states have internal predecessors, (3965), 584 states have call successors, (584), 410 states have call predecessors, (584), 433 states have return successors, (783), 580 states have call predecessors, (783), 583 states have call successors, (783) [2022-11-16 19:47:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 5332 transitions. [2022-11-16 19:47:40,709 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 5332 transitions. Word has length 109 [2022-11-16 19:47:40,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:40,710 INFO L495 AbstractCegarLoop]: Abstraction has 4069 states and 5332 transitions. [2022-11-16 19:47:40,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:47:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 5332 transitions. [2022-11-16 19:47:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-16 19:47:40,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:40,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:40,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:40,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:40,948 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:47:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2074189640, now seen corresponding path program 1 times [2022-11-16 19:47:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:40,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608292043] [2022-11-16 19:47:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-16 19:47:41,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:41,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608292043] [2022-11-16 19:47:41,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608292043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:41,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709386292] [2022-11-16 19:47:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:41,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:41,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:41,059 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:41,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 19:47:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:41,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:47:41,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:47:41,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:47:41,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709386292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:47:41,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:47:41,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 19:47:41,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226343527] [2022-11-16 19:47:41,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:47:41,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:47:41,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:47:41,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:47:41,265 INFO L87 Difference]: Start difference. First operand 4069 states and 5332 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:47:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:42,062 INFO L93 Difference]: Finished difference Result 6695 states and 9021 transitions. [2022-11-16 19:47:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:47:42,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-16 19:47:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:42,082 INFO L225 Difference]: With dead ends: 6695 [2022-11-16 19:47:42,083 INFO L226 Difference]: Without dead ends: 4563 [2022-11-16 19:47:42,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:47:42,093 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 54 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:42,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 404 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:47:42,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4563 states. [2022-11-16 19:47:42,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4563 to 4275. [2022-11-16 19:47:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 3232 states have (on average 1.3159034653465347) internal successors, (4253), 3262 states have internal predecessors, (4253), 596 states have call successors, (596), 422 states have call predecessors, (596), 445 states have return successors, (795), 592 states have call predecessors, (795), 595 states have call successors, (795) [2022-11-16 19:47:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 5644 transitions. [2022-11-16 19:47:42,923 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 5644 transitions. Word has length 109 [2022-11-16 19:47:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:42,924 INFO L495 AbstractCegarLoop]: Abstraction has 4275 states and 5644 transitions. [2022-11-16 19:47:42,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:47:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 5644 transitions. [2022-11-16 19:47:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-16 19:47:42,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:42,935 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:42,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:43,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 19:47:43,142 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:47:43,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:43,143 INFO L85 PathProgramCache]: Analyzing trace with hash -730651071, now seen corresponding path program 2 times [2022-11-16 19:47:43,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:43,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143759336] [2022-11-16 19:47:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:43,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-16 19:47:43,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:43,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143759336] [2022-11-16 19:47:43,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143759336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:43,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165107485] [2022-11-16 19:47:43,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:47:43,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:43,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:43,376 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:43,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 19:47:43,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:47:43,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:43,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:47:43,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 19:47:43,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:47:43,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165107485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:47:43,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:47:43,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 19:47:43,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375834928] [2022-11-16 19:47:43,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:47:43,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:47:43,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:43,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:47:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:47:43,546 INFO L87 Difference]: Start difference. First operand 4275 states and 5644 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:47:44,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:44,650 INFO L93 Difference]: Finished difference Result 7210 states and 9929 transitions. [2022-11-16 19:47:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:47:44,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-11-16 19:47:44,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:44,669 INFO L225 Difference]: With dead ends: 7210 [2022-11-16 19:47:44,669 INFO L226 Difference]: Without dead ends: 4872 [2022-11-16 19:47:44,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:47:44,679 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 109 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:44,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 418 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:47:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2022-11-16 19:47:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 4798. [2022-11-16 19:47:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 3654 states have (on average 1.3111658456486042) internal successors, (4791), 3688 states have internal predecessors, (4791), 655 states have call successors, (655), 465 states have call predecessors, (655), 487 states have return successors, (911), 646 states have call predecessors, (911), 654 states have call successors, (911) [2022-11-16 19:47:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 6357 transitions. [2022-11-16 19:47:45,509 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 6357 transitions. Word has length 109 [2022-11-16 19:47:45,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:45,510 INFO L495 AbstractCegarLoop]: Abstraction has 4798 states and 6357 transitions. [2022-11-16 19:47:45,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:47:45,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 6357 transitions. [2022-11-16 19:47:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-16 19:47:45,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:45,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:45,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:45,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:45,773 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:47:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash 244107795, now seen corresponding path program 1 times [2022-11-16 19:47:45,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:45,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602625808] [2022-11-16 19:47:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:45,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-16 19:47:46,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602625808] [2022-11-16 19:47:46,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602625808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578155273] [2022-11-16 19:47:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:46,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:46,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:46,030 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:46,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 19:47:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:46,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:47:46,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:47:46,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:47:46,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578155273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:47:46,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:47:46,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 19:47:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587531429] [2022-11-16 19:47:46,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:47:46,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:47:46,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:47:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:47:46,256 INFO L87 Difference]: Start difference. First operand 4798 states and 6357 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:47:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:47,446 INFO L93 Difference]: Finished difference Result 9794 states and 13423 transitions. [2022-11-16 19:47:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:47:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2022-11-16 19:47:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:47,472 INFO L225 Difference]: With dead ends: 9794 [2022-11-16 19:47:47,472 INFO L226 Difference]: Without dead ends: 6165 [2022-11-16 19:47:47,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:47:47,484 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 51 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:47,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 365 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:47:47,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6165 states. [2022-11-16 19:47:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6165 to 5238. [2022-11-16 19:47:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 4042 states have (on average 1.3337456704601682) internal successors, (5391), 4077 states have internal predecessors, (5391), 681 states have call successors, (681), 491 states have call predecessors, (681), 513 states have return successors, (937), 671 states have call predecessors, (937), 680 states have call successors, (937) [2022-11-16 19:47:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 7009 transitions. [2022-11-16 19:47:48,407 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 7009 transitions. Word has length 110 [2022-11-16 19:47:48,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:48,408 INFO L495 AbstractCegarLoop]: Abstraction has 5238 states and 7009 transitions. [2022-11-16 19:47:48,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:47:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 7009 transitions. [2022-11-16 19:47:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 19:47:48,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:48,419 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:48,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:48,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 19:47:48,627 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:47:48,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:48,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1003080199, now seen corresponding path program 1 times [2022-11-16 19:47:48,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:48,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099478553] [2022-11-16 19:47:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:48,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 19:47:48,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:48,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099478553] [2022-11-16 19:47:48,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099478553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:48,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122718403] [2022-11-16 19:47:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:48,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:48,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:48,908 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:48,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 19:47:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:49,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:47:49,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 19:47:49,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:47:49,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122718403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:47:49,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:47:49,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-16 19:47:49,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624523683] [2022-11-16 19:47:49,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:47:49,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:47:49,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:47:49,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 19:47:49,182 INFO L87 Difference]: Start difference. First operand 5238 states and 7009 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 19:47:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:50,722 INFO L93 Difference]: Finished difference Result 11196 states and 15291 transitions. [2022-11-16 19:47:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:47:50,723 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), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2022-11-16 19:47:50,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:50,777 INFO L225 Difference]: With dead ends: 11196 [2022-11-16 19:47:50,777 INFO L226 Difference]: Without dead ends: 7127 [2022-11-16 19:47:50,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:47:50,793 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 399 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:50,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 397 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:47:50,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2022-11-16 19:47:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 7125. [2022-11-16 19:47:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7125 states, 5536 states have (on average 1.330021676300578) internal successors, (7363), 5581 states have internal predecessors, (7363), 911 states have call successors, (911), 654 states have call predecessors, (911), 676 states have return successors, (1260), 891 states have call predecessors, (1260), 910 states have call successors, (1260) [2022-11-16 19:47:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7125 states to 7125 states and 9534 transitions. [2022-11-16 19:47:52,071 INFO L78 Accepts]: Start accepts. Automaton has 7125 states and 9534 transitions. Word has length 111 [2022-11-16 19:47:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:52,072 INFO L495 AbstractCegarLoop]: Abstraction has 7125 states and 9534 transitions. [2022-11-16 19:47:52,072 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), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 19:47:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 7125 states and 9534 transitions. [2022-11-16 19:47:52,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 19:47:52,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:52,086 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:52,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:52,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 19:47:52,290 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:47:52,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:52,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1746096297, now seen corresponding path program 1 times [2022-11-16 19:47:52,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:52,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124834334] [2022-11-16 19:47:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:52,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-16 19:47:52,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:52,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124834334] [2022-11-16 19:47:52,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124834334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:52,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300039229] [2022-11-16 19:47:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:52,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:52,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:52,402 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:52,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 19:47:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:52,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:47:52,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:47:52,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:47:52,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300039229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:47:52,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:47:52,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 19:47:52,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103127335] [2022-11-16 19:47:52,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:47:52,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:47:52,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:52,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:47:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:47:52,613 INFO L87 Difference]: Start difference. First operand 7125 states and 9534 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:47:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:53,920 INFO L93 Difference]: Finished difference Result 12540 states and 17196 transitions. [2022-11-16 19:47:53,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:47:53,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-16 19:47:53,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:53,951 INFO L225 Difference]: With dead ends: 12540 [2022-11-16 19:47:53,951 INFO L226 Difference]: Without dead ends: 8531 [2022-11-16 19:47:53,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:47:53,966 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 59 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:53,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 412 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:47:53,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8531 states. [2022-11-16 19:47:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8531 to 7809. [2022-11-16 19:47:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7809 states, 6132 states have (on average 1.3478473581213308) internal successors, (8265), 6177 states have internal predecessors, (8265), 955 states have call successors, (955), 698 states have call predecessors, (955), 720 states have return successors, (1304), 935 states have call predecessors, (1304), 954 states have call successors, (1304) [2022-11-16 19:47:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 10524 transitions. [2022-11-16 19:47:55,299 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 10524 transitions. Word has length 111 [2022-11-16 19:47:55,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:55,302 INFO L495 AbstractCegarLoop]: Abstraction has 7809 states and 10524 transitions. [2022-11-16 19:47:55,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:47:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 10524 transitions. [2022-11-16 19:47:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 19:47:55,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:55,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:55,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:55,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 19:47:55,523 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:47:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:55,523 INFO L85 PathProgramCache]: Analyzing trace with hash 322754275, now seen corresponding path program 1 times [2022-11-16 19:47:55,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:55,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219715019] [2022-11-16 19:47:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:55,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 19:47:55,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:55,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219715019] [2022-11-16 19:47:55,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219715019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:55,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007133917] [2022-11-16 19:47:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:55,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:55,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:55,739 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:55,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 19:47:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:55,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:47:55,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 19:47:55,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:47:55,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007133917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:47:55,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:47:55,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 19:47:55,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803067389] [2022-11-16 19:47:55,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:47:55,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:47:55,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:55,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:47:55,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:47:55,927 INFO L87 Difference]: Start difference. First operand 7809 states and 10524 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:47:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:57,429 INFO L93 Difference]: Finished difference Result 12522 states and 17554 transitions. [2022-11-16 19:47:57,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:47:57,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2022-11-16 19:47:57,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:57,460 INFO L225 Difference]: With dead ends: 12522 [2022-11-16 19:47:57,460 INFO L226 Difference]: Without dead ends: 7829 [2022-11-16 19:47:57,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:47:57,482 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 90 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:57,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 412 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:47:57,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2022-11-16 19:47:58,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7757. [2022-11-16 19:47:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7757 states, 6080 states have (on average 1.3245065789473685) internal successors, (8053), 6125 states have internal predecessors, (8053), 955 states have call successors, (955), 698 states have call predecessors, (955), 720 states have return successors, (1304), 935 states have call predecessors, (1304), 954 states have call successors, (1304) [2022-11-16 19:47:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7757 states to 7757 states and 10312 transitions. [2022-11-16 19:47:58,786 INFO L78 Accepts]: Start accepts. Automaton has 7757 states and 10312 transitions. Word has length 112 [2022-11-16 19:47:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:58,787 INFO L495 AbstractCegarLoop]: Abstraction has 7757 states and 10312 transitions. [2022-11-16 19:47:58,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:47:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 7757 states and 10312 transitions. [2022-11-16 19:47:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 19:47:58,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:58,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:58,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-16 19:47:59,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 19:47:59,005 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:47:59,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash -651480987, now seen corresponding path program 1 times [2022-11-16 19:47:59,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:59,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52831004] [2022-11-16 19:47:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:59,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 19:47:59,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:59,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52831004] [2022-11-16 19:47:59,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52831004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:59,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456791469] [2022-11-16 19:47:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:59,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:59,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:59,193 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:59,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 19:47:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:59,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:47:59,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 19:47:59,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:47:59,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456791469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:47:59,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:47:59,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-16 19:47:59,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530956230] [2022-11-16 19:47:59,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:47:59,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:47:59,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:59,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:47:59,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:47:59,418 INFO L87 Difference]: Start difference. First operand 7757 states and 10312 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 19:48:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:01,229 INFO L93 Difference]: Finished difference Result 17307 states and 23235 transitions. [2022-11-16 19:48:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:48:01,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2022-11-16 19:48:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:01,254 INFO L225 Difference]: With dead ends: 17307 [2022-11-16 19:48:01,254 INFO L226 Difference]: Without dead ends: 10719 [2022-11-16 19:48:01,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:48:01,267 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 380 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:01,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 395 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:48:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10719 states. [2022-11-16 19:48:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10719 to 10717. [2022-11-16 19:48:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10717 states, 8418 states have (on average 1.3042290330244715) internal successors, (10979), 8478 states have internal predecessors, (10979), 1314 states have call successors, (1314), 961 states have call predecessors, (1314), 983 states have return successors, (1794), 1279 states have call predecessors, (1794), 1313 states have call successors, (1794) [2022-11-16 19:48:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10717 states to 10717 states and 14087 transitions. [2022-11-16 19:48:03,090 INFO L78 Accepts]: Start accepts. Automaton has 10717 states and 14087 transitions. Word has length 112 [2022-11-16 19:48:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:03,090 INFO L495 AbstractCegarLoop]: Abstraction has 10717 states and 14087 transitions. [2022-11-16 19:48:03,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 19:48:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 10717 states and 14087 transitions. [2022-11-16 19:48:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 19:48:03,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:03,100 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:48:03,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:03,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 19:48:03,301 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:48:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:03,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1843676902, now seen corresponding path program 1 times [2022-11-16 19:48:03,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:48:03,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072033856] [2022-11-16 19:48:03,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:03,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:48:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-16 19:48:03,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:48:03,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072033856] [2022-11-16 19:48:03,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072033856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:48:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433410500] [2022-11-16 19:48:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:03,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:03,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:03,399 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:03,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 19:48:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:03,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:48:03,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:48:03,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:03,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433410500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:03,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:48:03,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 19:48:03,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480314139] [2022-11-16 19:48:03,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:03,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:48:03,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:48:03,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:48:03,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:48:03,601 INFO L87 Difference]: Start difference. First operand 10717 states and 14087 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:48:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:05,797 INFO L93 Difference]: Finished difference Result 19525 states and 26071 transitions. [2022-11-16 19:48:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:48:05,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2022-11-16 19:48:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:05,837 INFO L225 Difference]: With dead ends: 19525 [2022-11-16 19:48:05,837 INFO L226 Difference]: Without dead ends: 13155 [2022-11-16 19:48:05,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:48:05,852 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 64 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:05,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 414 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:48:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13155 states. [2022-11-16 19:48:07,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13155 to 11865. [2022-11-16 19:48:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11865 states, 9390 states have (on average 1.3121405750798723) internal successors, (12321), 9450 states have internal predecessors, (12321), 1402 states have call successors, (1402), 1049 states have call predecessors, (1402), 1071 states have return successors, (1882), 1367 states have call predecessors, (1882), 1401 states have call successors, (1882) [2022-11-16 19:48:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11865 states to 11865 states and 15605 transitions. [2022-11-16 19:48:07,647 INFO L78 Accepts]: Start accepts. Automaton has 11865 states and 15605 transitions. Word has length 115 [2022-11-16 19:48:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:07,648 INFO L495 AbstractCegarLoop]: Abstraction has 11865 states and 15605 transitions. [2022-11-16 19:48:07,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:48:07,648 INFO L276 IsEmpty]: Start isEmpty. Operand 11865 states and 15605 transitions. [2022-11-16 19:48:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 19:48:07,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:07,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:48:07,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:07,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:07,863 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:48:07,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:07,864 INFO L85 PathProgramCache]: Analyzing trace with hash -332806758, now seen corresponding path program 1 times [2022-11-16 19:48:07,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:48:07,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005945691] [2022-11-16 19:48:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:07,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:48:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-16 19:48:07,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:48:07,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005945691] [2022-11-16 19:48:07,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005945691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:48:07,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196799904] [2022-11-16 19:48:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:07,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:07,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:07,998 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:08,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 19:48:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:08,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 19:48:08,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 19:48:08,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:08,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196799904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:08,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:48:08,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-16 19:48:08,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63763640] [2022-11-16 19:48:08,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:08,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:48:08,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:48:08,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:48:08,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:08,197 INFO L87 Difference]: Start difference. First operand 11865 states and 15605 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 19:48:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:09,857 INFO L93 Difference]: Finished difference Result 17502 states and 22962 transitions. [2022-11-16 19:48:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:48:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-16 19:48:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:09,880 INFO L225 Difference]: With dead ends: 17502 [2022-11-16 19:48:09,880 INFO L226 Difference]: Without dead ends: 12336 [2022-11-16 19:48:09,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:48:09,888 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 192 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:09,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 561 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:48:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12336 states. [2022-11-16 19:48:11,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12336 to 12107. [2022-11-16 19:48:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12107 states, 9585 states have (on average 1.309754825247783) internal successors, (12554), 9663 states have internal predecessors, (12554), 1409 states have call successors, (1409), 1053 states have call predecessors, (1409), 1111 states have return successors, (1943), 1392 states have call predecessors, (1943), 1408 states have call successors, (1943) [2022-11-16 19:48:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12107 states to 12107 states and 15906 transitions. [2022-11-16 19:48:11,532 INFO L78 Accepts]: Start accepts. Automaton has 12107 states and 15906 transitions. Word has length 116 [2022-11-16 19:48:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:11,533 INFO L495 AbstractCegarLoop]: Abstraction has 12107 states and 15906 transitions. [2022-11-16 19:48:11,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 19:48:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 12107 states and 15906 transitions. [2022-11-16 19:48:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-16 19:48:11,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:11,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:48:11,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:11,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 19:48:11,748 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:48:11,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:11,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1522491441, now seen corresponding path program 1 times [2022-11-16 19:48:11,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:48:11,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674880307] [2022-11-16 19:48:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:11,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:48:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-16 19:48:11,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:48:11,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674880307] [2022-11-16 19:48:11,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674880307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:48:11,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659285543] [2022-11-16 19:48:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:11,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:11,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:11,820 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:11,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 19:48:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:11,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:48:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 19:48:12,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:12,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659285543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:12,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:48:12,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-16 19:48:12,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291601740] [2022-11-16 19:48:12,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:12,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:48:12,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:48:12,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:48:12,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:12,005 INFO L87 Difference]: Start difference. First operand 12107 states and 15906 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:48:13,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:13,769 INFO L93 Difference]: Finished difference Result 17219 states and 22776 transitions. [2022-11-16 19:48:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:48:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-16 19:48:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:13,796 INFO L225 Difference]: With dead ends: 17219 [2022-11-16 19:48:13,796 INFO L226 Difference]: Without dead ends: 11849 [2022-11-16 19:48:13,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:13,808 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 22 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:13,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 359 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:48:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11849 states. [2022-11-16 19:48:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11849 to 11849. [2022-11-16 19:48:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11849 states, 9363 states have (on average 1.3094093773363238) internal successors, (12260), 9432 states have internal predecessors, (12260), 1409 states have call successors, (1409), 1053 states have call predecessors, (1409), 1075 states have return successors, (1889), 1365 states have call predecessors, (1889), 1408 states have call successors, (1889) [2022-11-16 19:48:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 15558 transitions. [2022-11-16 19:48:15,343 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 15558 transitions. Word has length 117 [2022-11-16 19:48:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:15,343 INFO L495 AbstractCegarLoop]: Abstraction has 11849 states and 15558 transitions. [2022-11-16 19:48:15,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:48:15,343 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 15558 transitions. [2022-11-16 19:48:15,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-16 19:48:15,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:15,353 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:48:15,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 19:48:15,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:15,553 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:48:15,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:15,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1849729441, now seen corresponding path program 1 times [2022-11-16 19:48:15,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:48:15,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172173399] [2022-11-16 19:48:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:15,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:48:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 19:48:15,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:48:15,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172173399] [2022-11-16 19:48:15,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172173399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:48:15,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913228651] [2022-11-16 19:48:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:15,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:15,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:15,694 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:15,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 19:48:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:15,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:48:15,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 19:48:15,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:15,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913228651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:15,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:48:15,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-16 19:48:15,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252333541] [2022-11-16 19:48:15,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:15,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:48:15,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:48:15,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:48:15,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:48:15,929 INFO L87 Difference]: Start difference. First operand 11849 states and 15558 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:48:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:17,692 INFO L93 Difference]: Finished difference Result 20838 states and 28005 transitions. [2022-11-16 19:48:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:48:17,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-16 19:48:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:17,723 INFO L225 Difference]: With dead ends: 20838 [2022-11-16 19:48:17,723 INFO L226 Difference]: Without dead ends: 13356 [2022-11-16 19:48:17,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:48:17,742 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 164 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:17,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 226 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:48:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13356 states. [2022-11-16 19:48:19,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13356 to 13216. [2022-11-16 19:48:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13216 states, 10622 states have (on average 1.2879871963848617) internal successors, (13681), 10691 states have internal predecessors, (13681), 1422 states have call successors, (1422), 1148 states have call predecessors, (1422), 1170 states have return successors, (2078), 1378 states have call predecessors, (2078), 1421 states have call successors, (2078) [2022-11-16 19:48:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13216 states to 13216 states and 17181 transitions. [2022-11-16 19:48:19,469 INFO L78 Accepts]: Start accepts. Automaton has 13216 states and 17181 transitions. Word has length 117 [2022-11-16 19:48:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:19,470 INFO L495 AbstractCegarLoop]: Abstraction has 13216 states and 17181 transitions. [2022-11-16 19:48:19,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:48:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 13216 states and 17181 transitions. [2022-11-16 19:48:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-16 19:48:19,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:19,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:48:19,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:19,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:19,689 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:48:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:19,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1005730431, now seen corresponding path program 1 times [2022-11-16 19:48:19,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:48:19,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275971175] [2022-11-16 19:48:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:19,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:48:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 19:48:19,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:48:19,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275971175] [2022-11-16 19:48:19,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275971175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:48:19,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564601371] [2022-11-16 19:48:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:19,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:19,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:19,749 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:19,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 19:48:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:48:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 19:48:19,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:19,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564601371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:19,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:48:19,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-16 19:48:19,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130160865] [2022-11-16 19:48:19,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:19,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:48:19,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:48:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:48:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:19,962 INFO L87 Difference]: Start difference. First operand 13216 states and 17181 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:48:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:21,947 INFO L93 Difference]: Finished difference Result 21600 states and 29005 transitions. [2022-11-16 19:48:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:48:21,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 117 [2022-11-16 19:48:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:21,977 INFO L225 Difference]: With dead ends: 21600 [2022-11-16 19:48:21,977 INFO L226 Difference]: Without dead ends: 13191 [2022-11-16 19:48:21,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:21,991 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 87 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:21,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 424 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:48:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13191 states. [2022-11-16 19:48:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13191 to 13040. [2022-11-16 19:48:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13040 states, 10446 states have (on average 1.2604824813325675) internal successors, (13167), 10515 states have internal predecessors, (13167), 1422 states have call successors, (1422), 1148 states have call predecessors, (1422), 1170 states have return successors, (2078), 1378 states have call predecessors, (2078), 1421 states have call successors, (2078) [2022-11-16 19:48:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13040 states to 13040 states and 16667 transitions. [2022-11-16 19:48:24,164 INFO L78 Accepts]: Start accepts. Automaton has 13040 states and 16667 transitions. Word has length 117 [2022-11-16 19:48:24,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:24,164 INFO L495 AbstractCegarLoop]: Abstraction has 13040 states and 16667 transitions. [2022-11-16 19:48:24,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:48:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 13040 states and 16667 transitions. [2022-11-16 19:48:24,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-16 19:48:24,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:24,181 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:48:24,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:24,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 19:48:24,388 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:48:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:24,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2061203851, now seen corresponding path program 1 times [2022-11-16 19:48:24,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:48:24,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934973284] [2022-11-16 19:48:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:24,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:48:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-16 19:48:24,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:48:24,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934973284] [2022-11-16 19:48:24,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934973284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:24,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:48:24,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-16 19:48:24,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929287281] [2022-11-16 19:48:24,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:24,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 19:48:24,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:48:24,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 19:48:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:48:24,833 INFO L87 Difference]: Start difference. First operand 13040 states and 16667 transitions. Second operand has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-16 19:48:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:29,783 INFO L93 Difference]: Finished difference Result 35890 states and 47411 transitions. [2022-11-16 19:48:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 19:48:29,784 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 114 [2022-11-16 19:48:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:29,844 INFO L225 Difference]: With dead ends: 35890 [2022-11-16 19:48:29,844 INFO L226 Difference]: Without dead ends: 25312 [2022-11-16 19:48:29,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:48:29,861 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 966 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:29,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 566 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 19:48:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25312 states. [2022-11-16 19:48:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25312 to 22073. [2022-11-16 19:48:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22073 states, 17934 states have (on average 1.2524255603880896) internal successors, (22461), 18045 states have internal predecessors, (22461), 2238 states have call successors, (2238), 1871 states have call predecessors, (2238), 1899 states have return successors, (3260), 2158 states have call predecessors, (3260), 2237 states have call successors, (3260) [2022-11-16 19:48:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22073 states to 22073 states and 27959 transitions. [2022-11-16 19:48:33,040 INFO L78 Accepts]: Start accepts. Automaton has 22073 states and 27959 transitions. Word has length 114 [2022-11-16 19:48:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:33,041 INFO L495 AbstractCegarLoop]: Abstraction has 22073 states and 27959 transitions. [2022-11-16 19:48:33,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-16 19:48:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 22073 states and 27959 transitions. [2022-11-16 19:48:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 19:48:33,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:33,053 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:48:33,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-16 19:48:33,054 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:48:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash 46418609, now seen corresponding path program 1 times [2022-11-16 19:48:33,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:48:33,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061053637] [2022-11-16 19:48:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:33,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:48:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 19:48:33,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:48:33,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061053637] [2022-11-16 19:48:33,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061053637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:33,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:48:33,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:48:33,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721764684] [2022-11-16 19:48:33,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:33,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:48:33,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:48:33,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:48:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:48:33,254 INFO L87 Difference]: Start difference. First operand 22073 states and 27959 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:48:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:38,069 INFO L93 Difference]: Finished difference Result 44532 states and 56161 transitions. [2022-11-16 19:48:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:48:38,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 115 [2022-11-16 19:48:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:38,113 INFO L225 Difference]: With dead ends: 44532 [2022-11-16 19:48:38,114 INFO L226 Difference]: Without dead ends: 19903 [2022-11-16 19:48:38,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:48:38,148 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 120 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:38,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 582 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:48:38,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19903 states. [2022-11-16 19:48:41,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19903 to 19046. [2022-11-16 19:48:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19046 states, 15268 states have (on average 1.2196096410793817) internal successors, (18621), 15391 states have internal predecessors, (18621), 2056 states have call successors, (2056), 1698 states have call predecessors, (2056), 1720 states have return successors, (2738), 1958 states have call predecessors, (2738), 2055 states have call successors, (2738) [2022-11-16 19:48:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19046 states to 19046 states and 23415 transitions. [2022-11-16 19:48:41,134 INFO L78 Accepts]: Start accepts. Automaton has 19046 states and 23415 transitions. Word has length 115 [2022-11-16 19:48:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:41,135 INFO L495 AbstractCegarLoop]: Abstraction has 19046 states and 23415 transitions. [2022-11-16 19:48:41,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:48:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 19046 states and 23415 transitions. [2022-11-16 19:48:41,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 19:48:41,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:41,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:48:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-16 19:48:41,144 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:48:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 767769446, now seen corresponding path program 1 times [2022-11-16 19:48:41,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:48:41,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96780890] [2022-11-16 19:48:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:41,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:48:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 19:48:41,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:48:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96780890] [2022-11-16 19:48:41,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96780890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:48:41,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091231780] [2022-11-16 19:48:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:41,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:41,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:41,339 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:41,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 19:48:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:41,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:48:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:41,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:41,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091231780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:41,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:48:41,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-16 19:48:41,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477487571] [2022-11-16 19:48:41,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:41,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:48:41,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:48:41,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:48:41,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:48:41,610 INFO L87 Difference]: Start difference. First operand 19046 states and 23415 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-16 19:48:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:46,138 INFO L93 Difference]: Finished difference Result 39065 states and 48550 transitions. [2022-11-16 19:48:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:48:46,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 116 [2022-11-16 19:48:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:46,192 INFO L225 Difference]: With dead ends: 39065 [2022-11-16 19:48:46,192 INFO L226 Difference]: Without dead ends: 25732 [2022-11-16 19:48:46,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:48:46,209 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 222 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:46,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 539 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:48:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25732 states. [2022-11-16 19:48:50,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25732 to 24258. [2022-11-16 19:48:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24258 states, 19411 states have (on average 1.2069445159960848) internal successors, (23428), 19548 states have internal predecessors, (23428), 2666 states have call successors, (2666), 2173 states have call predecessors, (2666), 2179 states have return successors, (3773), 2538 states have call predecessors, (3773), 2665 states have call successors, (3773) [2022-11-16 19:48:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24258 states to 24258 states and 29867 transitions. [2022-11-16 19:48:50,238 INFO L78 Accepts]: Start accepts. Automaton has 24258 states and 29867 transitions. Word has length 116 [2022-11-16 19:48:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:50,238 INFO L495 AbstractCegarLoop]: Abstraction has 24258 states and 29867 transitions. [2022-11-16 19:48:50,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-16 19:48:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 24258 states and 29867 transitions. [2022-11-16 19:48:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-16 19:48:50,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:50,246 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] [2022-11-16 19:48:50,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:50,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:50,447 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:48:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:50,447 INFO L85 PathProgramCache]: Analyzing trace with hash -480707774, now seen corresponding path program 1 times [2022-11-16 19:48:50,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:48:50,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431636809] [2022-11-16 19:48:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:50,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:48:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 19:48:51,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:48:51,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431636809] [2022-11-16 19:48:51,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431636809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:48:51,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959262008] [2022-11-16 19:48:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:51,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:51,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:51,335 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:51,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 19:48:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:51,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 19:48:51,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:48:52,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:48:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 19:48:54,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959262008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:54,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176161863] [2022-11-16 19:48:54,465 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-16 19:48:54,465 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:48:54,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:48:54,466 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:48:54,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:49:01,971 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 192 for LOIs [2022-11-16 19:49:02,397 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 140 for LOIs [2022-11-16 19:49:02,422 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 70 for LOIs [2022-11-16 19:49:02,433 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2022-11-16 19:49:03,550 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 122 for LOIs [2022-11-16 19:49:03,703 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 70 for LOIs [2022-11-16 19:49:03,828 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 196 for LOIs [2022-11-16 19:49:04,393 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2022-11-16 19:49:04,639 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:49:36,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '805538#(and (= ~q_req_up~0 1) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~c_dr_pc~0 1) (<= 2 ~E_2~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (= ~E_1~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-16 19:49:36,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:49:36,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:49:36,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-16 19:49:36,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806177557] [2022-11-16 19:49:36,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:49:36,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 19:49:36,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:49:36,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 19:49:36,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=11246, Unknown=0, NotChecked=0, Total=12210 [2022-11-16 19:49:36,838 INFO L87 Difference]: Start difference. First operand 24258 states and 29867 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-16 19:49:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:49:59,544 INFO L93 Difference]: Finished difference Result 26542 states and 32569 transitions. [2022-11-16 19:49:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-16 19:49:59,545 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-16 19:49:59,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:49:59,603 INFO L225 Difference]: With dead ends: 26542 [2022-11-16 19:49:59,603 INFO L226 Difference]: Without dead ends: 25471 [2022-11-16 19:49:59,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 318 SyntacticMatches, 6 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26825 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=6762, Invalid=61620, Unknown=0, NotChecked=0, Total=68382 [2022-11-16 19:49:59,618 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 5058 mSDsluCounter, 2617 mSDsCounter, 0 mSdLazyCounter, 8433 mSolverCounterSat, 3514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5058 SdHoareTripleChecker+Valid, 2796 SdHoareTripleChecker+Invalid, 11947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3514 IncrementalHoareTripleChecker+Valid, 8433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:49:59,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5058 Valid, 2796 Invalid, 11947 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3514 Valid, 8433 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-16 19:49:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25471 states. [2022-11-16 19:50:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25471 to 24074. [2022-11-16 19:50:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24074 states, 19299 states have (on average 1.2073164412663868) internal successors, (23300), 19435 states have internal predecessors, (23300), 2626 states have call successors, (2626), 2141 states have call predecessors, (2626), 2147 states have return successors, (3723), 2499 states have call predecessors, (3723), 2625 states have call successors, (3723) [2022-11-16 19:50:03,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24074 states to 24074 states and 29649 transitions. [2022-11-16 19:50:03,686 INFO L78 Accepts]: Start accepts. Automaton has 24074 states and 29649 transitions. Word has length 124 [2022-11-16 19:50:03,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:03,687 INFO L495 AbstractCegarLoop]: Abstraction has 24074 states and 29649 transitions. [2022-11-16 19:50:03,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-16 19:50:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 24074 states and 29649 transitions. [2022-11-16 19:50:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-16 19:50:03,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:03,696 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] [2022-11-16 19:50:03,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:03,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 19:50:03,896 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:50:03,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:03,897 INFO L85 PathProgramCache]: Analyzing trace with hash 300997334, now seen corresponding path program 1 times [2022-11-16 19:50:03,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:03,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778182630] [2022-11-16 19:50:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:03,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 19:50:04,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:04,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778182630] [2022-11-16 19:50:04,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778182630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:50:04,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012023958] [2022-11-16 19:50:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:04,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:50:04,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:50:04,096 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:50:04,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 19:50:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:04,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 19:50:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 19:50:04,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 19:50:04,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012023958] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 19:50:04,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:50:04,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-16 19:50:04,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316183353] [2022-11-16 19:50:04,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:04,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:50:04,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:04,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:50:04,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:50:04,608 INFO L87 Difference]: Start difference. First operand 24074 states and 29649 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) [2022-11-16 19:50:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:09,608 INFO L93 Difference]: Finished difference Result 24729 states and 30390 transitions. [2022-11-16 19:50:09,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 19:50:09,609 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 [2022-11-16 19:50:09,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:09,669 INFO L225 Difference]: With dead ends: 24729 [2022-11-16 19:50:09,669 INFO L226 Difference]: Without dead ends: 23842 [2022-11-16 19:50:09,677 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 [2022-11-16 19:50:09,677 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 408 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:09,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 533 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:50:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23842 states. [2022-11-16 19:50:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23842 to 23805. [2022-11-16 19:50:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23805 states, 19100 states have (on average 1.2070680628272252) internal successors, (23055), 19236 states have internal predecessors, (23055), 2590 states have call successors, (2590), 2111 states have call predecessors, (2590), 2113 states have return successors, (3682), 2459 states have call predecessors, (3682), 2589 states have call successors, (3682) [2022-11-16 19:50:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23805 states to 23805 states and 29327 transitions. [2022-11-16 19:50:13,840 INFO L78 Accepts]: Start accepts. Automaton has 23805 states and 29327 transitions. Word has length 125 [2022-11-16 19:50:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:13,840 INFO L495 AbstractCegarLoop]: Abstraction has 23805 states and 29327 transitions. [2022-11-16 19:50:13,841 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) [2022-11-16 19:50:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 23805 states and 29327 transitions. [2022-11-16 19:50:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-16 19:50:13,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:13,855 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:13,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:14,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 19:50:14,055 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:50:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2075686238, now seen corresponding path program 1 times [2022-11-16 19:50:14,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:14,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025781695] [2022-11-16 19:50:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:14,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-16 19:50:14,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:14,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025781695] [2022-11-16 19:50:14,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025781695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:50:14,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864990970] [2022-11-16 19:50:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:14,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:50:14,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:50:14,211 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:50:14,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 19:50:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:14,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:50:14,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 19:50:14,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:14,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864990970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:14,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:50:14,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-16 19:50:14,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355438874] [2022-11-16 19:50:14,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:14,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:50:14,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:14,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:50:14,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:50:14,474 INFO L87 Difference]: Start difference. First operand 23805 states and 29327 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:50:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:19,383 INFO L93 Difference]: Finished difference Result 42701 states and 53690 transitions. [2022-11-16 19:50:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:50:19,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 141 [2022-11-16 19:50:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:19,448 INFO L225 Difference]: With dead ends: 42701 [2022-11-16 19:50:19,448 INFO L226 Difference]: Without dead ends: 26600 [2022-11-16 19:50:19,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:50:19,474 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 165 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:19,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 226 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:50:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26600 states. [2022-11-16 19:50:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26600 to 25780. [2022-11-16 19:50:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25780 states, 20892 states have (on average 1.185669155657668) internal successors, (24771), 21121 states have internal predecessors, (24771), 2590 states have call successors, (2590), 2186 states have call predecessors, (2590), 2296 states have return successors, (3884), 2474 states have call predecessors, (3884), 2589 states have call successors, (3884) [2022-11-16 19:50:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25780 states to 25780 states and 31245 transitions. [2022-11-16 19:50:24,316 INFO L78 Accepts]: Start accepts. Automaton has 25780 states and 31245 transitions. Word has length 141 [2022-11-16 19:50:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:24,316 INFO L495 AbstractCegarLoop]: Abstraction has 25780 states and 31245 transitions. [2022-11-16 19:50:24,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:50:24,317 INFO L276 IsEmpty]: Start isEmpty. Operand 25780 states and 31245 transitions. [2022-11-16 19:50:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-16 19:50:24,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:24,331 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:24,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:24,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 19:50:24,531 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:50:24,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:24,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1258180528, now seen corresponding path program 1 times [2022-11-16 19:50:24,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:24,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429262245] [2022-11-16 19:50:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:24,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 19:50:24,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:24,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429262245] [2022-11-16 19:50:24,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429262245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:50:24,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950072197] [2022-11-16 19:50:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:24,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:50:24,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:50:24,752 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:50:24,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 19:50:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:50:24,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:50:24,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:24,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950072197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:24,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:50:24,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-16 19:50:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994228967] [2022-11-16 19:50:24,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:24,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:50:24,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:50:24,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:50:24,995 INFO L87 Difference]: Start difference. First operand 25780 states and 31245 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 19:50:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:31,387 INFO L93 Difference]: Finished difference Result 51013 states and 62498 transitions. [2022-11-16 19:50:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:50:31,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 144 [2022-11-16 19:50:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:31,466 INFO L225 Difference]: With dead ends: 51013 [2022-11-16 19:50:31,467 INFO L226 Difference]: Without dead ends: 33309 [2022-11-16 19:50:31,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:50:31,494 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 236 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:31,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 531 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:50:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33309 states. [2022-11-16 19:50:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33309 to 31635. [2022-11-16 19:50:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31635 states, 25583 states have (on average 1.1759371457608567) internal successors, (30084), 25881 states have internal predecessors, (30084), 3224 states have call successors, (3224), 2694 states have call predecessors, (3224), 2826 states have return successors, (5177), 3061 states have call predecessors, (5177), 3223 states have call successors, (5177) [2022-11-16 19:50:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31635 states to 31635 states and 38485 transitions. [2022-11-16 19:50:37,745 INFO L78 Accepts]: Start accepts. Automaton has 31635 states and 38485 transitions. Word has length 144 [2022-11-16 19:50:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:37,745 INFO L495 AbstractCegarLoop]: Abstraction has 31635 states and 38485 transitions. [2022-11-16 19:50:37,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 19:50:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 31635 states and 38485 transitions. [2022-11-16 19:50:37,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-16 19:50:37,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:37,864 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:37,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:38,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:50:38,065 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:50:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1919255000, now seen corresponding path program 1 times [2022-11-16 19:50:38,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:38,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622253667] [2022-11-16 19:50:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:38,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 19:50:38,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:38,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622253667] [2022-11-16 19:50:38,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622253667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:50:38,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231063426] [2022-11-16 19:50:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:38,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:50:38,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:50:38,832 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:50:38,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 19:50:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:39,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:50:39,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 112 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 19:50:39,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-16 19:50:39,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231063426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:50:39,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270456229] [2022-11-16 19:50:39,463 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-16 19:50:39,463 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:50:39,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:50:39,464 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:50:39,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:51:07,689 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 204 for LOIs [2022-11-16 19:51:25,426 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 70 for LOIs [2022-11-16 19:51:25,435 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 212 for LOIs [2022-11-16 19:51:25,508 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 70 for LOIs [2022-11-16 19:51:25,672 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 70 for LOIs [2022-11-16 19:51:26,470 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 244 for LOIs [2022-11-16 19:51:39,243 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:52:02,052 WARN L233 SmtUtils]: Spent 20.30s on a formula simplification. DAG size of input: 425 DAG size of output: 375 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:52:19,513 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 482 DAG size of output: 338 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:52:38,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1156037#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 19:52:38,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:52:38,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:52:38,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 21 [2022-11-16 19:52:38,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619358569] [2022-11-16 19:52:38,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:52:38,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 19:52:38,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:52:38,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 19:52:38,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=4987, Unknown=0, NotChecked=0, Total=5402 [2022-11-16 19:52:38,537 INFO L87 Difference]: Start difference. First operand 31635 states and 38485 transitions. Second operand has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-16 19:52:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:48,462 INFO L93 Difference]: Finished difference Result 54377 states and 66315 transitions. [2022-11-16 19:52:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-16 19:52:48,463 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 159 [2022-11-16 19:52:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:48,514 INFO L225 Difference]: With dead ends: 54377 [2022-11-16 19:52:48,514 INFO L226 Difference]: Without dead ends: 23406 [2022-11-16 19:52:48,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 486 SyntacticMatches, 4 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14128 ImplicationChecksByTransitivity, 61.5s TimeCoverageRelationStatistics Valid=1910, Invalid=31032, Unknown=0, NotChecked=0, Total=32942 [2022-11-16 19:52:48,559 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 1988 mSDsluCounter, 3674 mSDsCounter, 0 mSdLazyCounter, 4233 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2007 SdHoareTripleChecker+Valid, 4009 SdHoareTripleChecker+Invalid, 4957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 4233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:48,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2007 Valid, 4009 Invalid, 4957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 4233 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 19:52:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23406 states. [2022-11-16 19:52:51,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23406 to 17072. [2022-11-16 19:52:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17072 states, 13810 states have (on average 1.1555394641564083) internal successors, (15958), 13898 states have internal predecessors, (15958), 1706 states have call successors, (1706), 1526 states have call predecessors, (1706), 1554 states have return successors, (2282), 1648 states have call predecessors, (2282), 1705 states have call successors, (2282) [2022-11-16 19:52:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17072 states to 17072 states and 19946 transitions. [2022-11-16 19:52:52,017 INFO L78 Accepts]: Start accepts. Automaton has 17072 states and 19946 transitions. Word has length 159 [2022-11-16 19:52:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:52,017 INFO L495 AbstractCegarLoop]: Abstraction has 17072 states and 19946 transitions. [2022-11-16 19:52:52,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-16 19:52:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17072 states and 19946 transitions. [2022-11-16 19:52:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-16 19:52:52,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:52,028 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-11-16 19:52:52,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:52,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:52,229 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:52:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:52,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2021320345, now seen corresponding path program 1 times [2022-11-16 19:52:52,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:52:52,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259718147] [2022-11-16 19:52:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:52,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:52:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 38 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-16 19:52:52,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:52:52,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259718147] [2022-11-16 19:52:52,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259718147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:52:52,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155380664] [2022-11-16 19:52:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:52,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:52,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:52:52,475 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:52:52,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_926d8228-ecdd-4f90-8786-a24de4f5fe98/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 19:52:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:52:52,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 111 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 19:52:52,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:52:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-16 19:52:53,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155380664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:52:53,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [430219908] [2022-11-16 19:52:53,179 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-11-16 19:52:53,180 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:52:53,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:52:53,180 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:52:53,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs