./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS --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 52de5146a3a24866d31d2076a85235f80d04004402c35cfcf3c3304704a7fec0 --- 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-8393723 [2022-11-19 07:11:41,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:11:41,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:11:41,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:11:41,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:11:41,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:11:41,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:11:41,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:11:41,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:11:41,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:11:41,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:11:41,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:11:41,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:11:41,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:11:41,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:11:41,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:11:41,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:11:41,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:11:41,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:11:41,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:11:41,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:11:41,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:11:41,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:11:41,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:11:41,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:11:41,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:11:41,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:11:41,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:11:41,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:11:41,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:11:41,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:11:41,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:11:41,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:11:41,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:11:41,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:11:41,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:11:41,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:11:41,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:11:41,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:11:41,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:11:41,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:11:41,434 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:11:41,483 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:11:41,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:11:41,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:11:41,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:11:41,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:11:41,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:11:41,486 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:11:41,486 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:11:41,487 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:11:41,487 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:11:41,488 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:11:41,488 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:11:41,488 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:11:41,489 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:11:41,489 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:11:41,489 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:11:41,489 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:11:41,490 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:11:41,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:11:41,491 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:11:41,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:11:41,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:11:41,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:11:41,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:11:41,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:11:41,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:11:41,492 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:11:41,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:11:41,493 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:11:41,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:11:41,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:11:41,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:11:41,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:11:41,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:11:41,495 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:11:41,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:11:41,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:11:41,496 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:11:41,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:11:41,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:11:41,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:11:41,497 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_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52de5146a3a24866d31d2076a85235f80d04004402c35cfcf3c3304704a7fec0 [2022-11-19 07:11:41,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:11:41,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:11:41,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:11:41,830 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:11:41,831 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:11:41,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c [2022-11-19 07:11:41,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/data/b04a5ee7f/e817a628c798405ab55048378142e242/FLAG689071ee5 [2022-11-19 07:11:42,434 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:11:42,434 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c [2022-11-19 07:11:42,471 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/data/b04a5ee7f/e817a628c798405ab55048378142e242/FLAG689071ee5 [2022-11-19 07:11:42,728 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/data/b04a5ee7f/e817a628c798405ab55048378142e242 [2022-11-19 07:11:42,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:11:42,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:11:42,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:11:42,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:11:42,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:11:42,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:11:42" (1/1) ... [2022-11-19 07:11:42,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5c282a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:42, skipping insertion in model container [2022-11-19 07:11:42,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:11:42" (1/1) ... [2022-11-19 07:11:42,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:11:42,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:11:43,027 WARN L234 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_f1f1d3c3-bf60-46d3-945e-8679e0717b30/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[914,927] [2022-11-19 07:11:43,117 WARN L234 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_f1f1d3c3-bf60-46d3-945e-8679e0717b30/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[7115,7128] [2022-11-19 07:11:43,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:11:43,263 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:11:43,275 WARN L234 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_f1f1d3c3-bf60-46d3-945e-8679e0717b30/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[914,927] [2022-11-19 07:11:43,292 WARN L234 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_f1f1d3c3-bf60-46d3-945e-8679e0717b30/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[7115,7128] [2022-11-19 07:11:43,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:11:43,366 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:11:43,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43 WrapperNode [2022-11-19 07:11:43,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:11:43,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:11:43,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:11:43,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:11:43,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (1/1) ... [2022-11-19 07:11:43,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (1/1) ... [2022-11-19 07:11:43,472 INFO L138 Inliner]: procedures = 63, calls = 72, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 634 [2022-11-19 07:11:43,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:11:43,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:11:43,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:11:43,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:11:43,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (1/1) ... [2022-11-19 07:11:43,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (1/1) ... [2022-11-19 07:11:43,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (1/1) ... [2022-11-19 07:11:43,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (1/1) ... [2022-11-19 07:11:43,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (1/1) ... [2022-11-19 07:11:43,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (1/1) ... [2022-11-19 07:11:43,552 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (1/1) ... [2022-11-19 07:11:43,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (1/1) ... [2022-11-19 07:11:43,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:11:43,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:11:43,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:11:43,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:11:43,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (1/1) ... [2022-11-19 07:11:43,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:11:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:43,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:11:43,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:11:43,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:11:43,633 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:11:43,634 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:11:43,634 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 07:11:43,634 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 07:11:43,634 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 07:11:43,634 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 07:11:43,635 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 07:11:43,635 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 07:11:43,635 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 07:11:43,635 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 07:11:43,635 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 07:11:43,636 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 07:11:43,636 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 07:11:43,636 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 07:11:43,636 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 07:11:43,636 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 07:11:43,637 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 07:11:43,637 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 07:11:43,637 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 07:11:43,637 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 07:11:43,637 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 07:11:43,638 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 07:11:43,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:11:43,638 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 07:11:43,638 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 07:11:43,638 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 07:11:43,639 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 07:11:43,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:11:43,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:11:43,639 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 07:11:43,639 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 07:11:43,747 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:11:43,750 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:11:44,775 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:11:45,141 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:11:45,141 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-19 07:11:45,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:11:45 BoogieIcfgContainer [2022-11-19 07:11:45,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:11:45,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:11:45,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:11:45,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:11:45,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:11:42" (1/3) ... [2022-11-19 07:11:45,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a74c7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:11:45, skipping insertion in model container [2022-11-19 07:11:45,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:11:43" (2/3) ... [2022-11-19 07:11:45,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a74c7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:11:45, skipping insertion in model container [2022-11-19 07:11:45,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:11:45" (3/3) ... [2022-11-19 07:11:45,166 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.05.cil-1.c [2022-11-19 07:11:45,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:11:45,216 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:11:45,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:11:45,302 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;@69d8e1e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:11:45,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:11:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 133 states have (on average 1.5112781954887218) internal successors, (201), 139 states have internal predecessors, (201), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-19 07:11:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:11:45,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:45,321 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] [2022-11-19 07:11:45,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:45,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1920597363, now seen corresponding path program 1 times [2022-11-19 07:11:45,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:45,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206087134] [2022-11-19 07:11:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:45,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:45,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206087134] [2022-11-19 07:11:45,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206087134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:45,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:45,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:11:45,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699080115] [2022-11-19 07:11:45,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:45,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:11:45,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:46,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:11:46,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:11:46,041 INFO L87 Difference]: Start difference. First operand has 183 states, 133 states have (on average 1.5112781954887218) internal successors, (201), 139 states have internal predecessors, (201), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) 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) [2022-11-19 07:11:47,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:47,122 INFO L93 Difference]: Finished difference Result 423 states and 602 transitions. [2022-11-19 07:11:47,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:11:47,125 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 [2022-11-19 07:11:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:47,138 INFO L225 Difference]: With dead ends: 423 [2022-11-19 07:11:47,138 INFO L226 Difference]: Without dead ends: 243 [2022-11-19 07:11:47,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:11:47,146 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 404 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:47,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 770 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:11:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-19 07:11:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2022-11-19 07:11:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 167 states have (on average 1.4131736526946108) internal successors, (236), 171 states have internal predecessors, (236), 41 states have call successors, (41), 21 states have call predecessors, (41), 20 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-19 07:11:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 316 transitions. [2022-11-19 07:11:47,233 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 316 transitions. Word has length 45 [2022-11-19 07:11:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:47,234 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 316 transitions. [2022-11-19 07:11:47,234 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) [2022-11-19 07:11:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 316 transitions. [2022-11-19 07:11:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:11:47,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:47,237 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] [2022-11-19 07:11:47,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:11:47,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:47,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1288017548, now seen corresponding path program 1 times [2022-11-19 07:11:47,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:47,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457829152] [2022-11-19 07:11:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:47,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:47,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:47,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457829152] [2022-11-19 07:11:47,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457829152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:47,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:47,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:11:47,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242079147] [2022-11-19 07:11:47,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:47,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:47,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:47,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:47,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:47,315 INFO L87 Difference]: Start difference. First operand 230 states and 316 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) [2022-11-19 07:11:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:47,501 INFO L93 Difference]: Finished difference Result 455 states and 603 transitions. [2022-11-19 07:11:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:47,502 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 [2022-11-19 07:11:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:47,513 INFO L225 Difference]: With dead ends: 455 [2022-11-19 07:11:47,514 INFO L226 Difference]: Without dead ends: 339 [2022-11-19 07:11:47,517 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 [2022-11-19 07:11:47,519 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 227 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:47,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 280 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-19 07:11:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 325. [2022-11-19 07:11:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 232 states have (on average 1.3620689655172413) internal successors, (316), 236 states have internal predecessors, (316), 57 states have call successors, (57), 35 states have call predecessors, (57), 34 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-11-19 07:11:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 428 transitions. [2022-11-19 07:11:47,578 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 428 transitions. Word has length 46 [2022-11-19 07:11:47,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:47,578 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 428 transitions. [2022-11-19 07:11:47,579 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) [2022-11-19 07:11:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 428 transitions. [2022-11-19 07:11:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:11:47,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:47,581 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] [2022-11-19 07:11:47,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:11:47,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:47,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1388552162, now seen corresponding path program 1 times [2022-11-19 07:11:47,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:47,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730385152] [2022-11-19 07:11:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:47,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:47,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:47,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730385152] [2022-11-19 07:11:47,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730385152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:47,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:47,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:11:47,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592306407] [2022-11-19 07:11:47,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:47,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:47,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:47,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:47,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:47,686 INFO L87 Difference]: Start difference. First operand 325 states and 428 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) [2022-11-19 07:11:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:47,868 INFO L93 Difference]: Finished difference Result 689 states and 876 transitions. [2022-11-19 07:11:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:47,869 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 [2022-11-19 07:11:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:47,873 INFO L225 Difference]: With dead ends: 689 [2022-11-19 07:11:47,873 INFO L226 Difference]: Without dead ends: 479 [2022-11-19 07:11:47,874 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 [2022-11-19 07:11:47,876 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 68 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:47,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 408 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-19 07:11:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 475. [2022-11-19 07:11:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 337 states have (on average 1.3382789317507418) internal successors, (451), 341 states have internal predecessors, (451), 81 states have call successors, (81), 56 states have call predecessors, (81), 55 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-11-19 07:11:47,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 611 transitions. [2022-11-19 07:11:47,946 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 611 transitions. Word has length 47 [2022-11-19 07:11:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:47,947 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 611 transitions. [2022-11-19 07:11:47,947 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) [2022-11-19 07:11:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 611 transitions. [2022-11-19 07:11:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:11:47,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:47,950 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] [2022-11-19 07:11:47,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:11:47,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash -76627223, now seen corresponding path program 1 times [2022-11-19 07:11:47,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:47,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772745422] [2022-11-19 07:11:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:48,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:48,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772745422] [2022-11-19 07:11:48,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772745422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:48,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:48,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:11:48,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618526069] [2022-11-19 07:11:48,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:48,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:11:48,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:11:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:11:48,108 INFO L87 Difference]: Start difference. First operand 475 states and 611 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-11-19 07:11:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:48,900 INFO L93 Difference]: Finished difference Result 968 states and 1391 transitions. [2022-11-19 07:11:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:11:48,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 46 [2022-11-19 07:11:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:48,911 INFO L225 Difference]: With dead ends: 968 [2022-11-19 07:11:48,911 INFO L226 Difference]: Without dead ends: 864 [2022-11-19 07:11:48,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:11:48,925 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 799 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:48,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 819 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:11:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-11-19 07:11:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 853. [2022-11-19 07:11:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 634 states have (on average 1.3958990536277602) internal successors, (885), 641 states have internal predecessors, (885), 138 states have call successors, (138), 80 states have call predecessors, (138), 79 states have return successors, (170), 133 states have call predecessors, (170), 136 states have call successors, (170) [2022-11-19 07:11:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1193 transitions. [2022-11-19 07:11:49,044 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1193 transitions. Word has length 46 [2022-11-19 07:11:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:49,045 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 1193 transitions. [2022-11-19 07:11:49,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-11-19 07:11:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1193 transitions. [2022-11-19 07:11:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:11:49,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:49,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:11:49,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:11:49,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:49,049 INFO L85 PathProgramCache]: Analyzing trace with hash -830257859, now seen corresponding path program 1 times [2022-11-19 07:11:49,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:49,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072342295] [2022-11-19 07:11:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:49,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:49,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:49,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072342295] [2022-11-19 07:11:49,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072342295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:49,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:49,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:11:49,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993390827] [2022-11-19 07:11:49,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:49,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:11:49,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:49,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:11:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:11:49,102 INFO L87 Difference]: Start difference. First operand 853 states and 1193 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:11:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:49,275 INFO L93 Difference]: Finished difference Result 1277 states and 1715 transitions. [2022-11-19 07:11:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:11:49,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-19 07:11:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:49,280 INFO L225 Difference]: With dead ends: 1277 [2022-11-19 07:11:49,281 INFO L226 Difference]: Without dead ends: 916 [2022-11-19 07:11:49,282 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 [2022-11-19 07:11:49,283 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 227 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:49,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 287 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:11:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-11-19 07:11:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 904. [2022-11-19 07:11:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 670 states have (on average 1.3835820895522388) internal successors, (927), 677 states have internal predecessors, (927), 146 states have call successors, (146), 87 states have call predecessors, (146), 86 states have return successors, (178), 141 states have call predecessors, (178), 144 states have call successors, (178) [2022-11-19 07:11:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1251 transitions. [2022-11-19 07:11:49,373 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1251 transitions. Word has length 53 [2022-11-19 07:11:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:49,374 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1251 transitions. [2022-11-19 07:11:49,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:11:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1251 transitions. [2022-11-19 07:11:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:11:49,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:49,376 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] [2022-11-19 07:11:49,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:11:49,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:49,377 INFO L85 PathProgramCache]: Analyzing trace with hash -484606027, now seen corresponding path program 1 times [2022-11-19 07:11:49,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:49,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302863875] [2022-11-19 07:11:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:49,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:49,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:49,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302863875] [2022-11-19 07:11:49,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302863875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:11:49,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:11:49,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:11:49,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618180655] [2022-11-19 07:11:49,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:11:49,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:11:49,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:49,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:11:49,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:11:49,494 INFO L87 Difference]: Start difference. First operand 904 states and 1251 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) [2022-11-19 07:11:49,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:11:49,865 INFO L93 Difference]: Finished difference Result 1013 states and 1383 transitions. [2022-11-19 07:11:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:11:49,865 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 [2022-11-19 07:11:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:11:49,871 INFO L225 Difference]: With dead ends: 1013 [2022-11-19 07:11:49,871 INFO L226 Difference]: Without dead ends: 1010 [2022-11-19 07:11:49,872 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 [2022-11-19 07:11:49,872 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 412 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:11:49,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 266 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:11:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-11-19 07:11:49,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 903. [2022-11-19 07:11:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 670 states have (on average 1.3791044776119403) internal successors, (924), 676 states have internal predecessors, (924), 145 states have call successors, (145), 87 states have call predecessors, (145), 86 states have return successors, (178), 141 states have call predecessors, (178), 144 states have call successors, (178) [2022-11-19 07:11:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1247 transitions. [2022-11-19 07:11:49,963 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1247 transitions. Word has length 54 [2022-11-19 07:11:49,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:11:49,963 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1247 transitions. [2022-11-19 07:11:49,963 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) [2022-11-19 07:11:49,963 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1247 transitions. [2022-11-19 07:11:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:11:49,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:11:49,965 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] [2022-11-19 07:11:49,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:11:49,965 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:11:49,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:11:49,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2138805113, now seen corresponding path program 1 times [2022-11-19 07:11:49,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:11:49,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633762791] [2022-11-19 07:11:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:49,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:11:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:50,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:11:50,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633762791] [2022-11-19 07:11:50,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633762791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:50,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642520432] [2022-11-19 07:11:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:11:50,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:11:50,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:11:50,166 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:11:50,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:11:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:11:50,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:11:50,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:11:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:50,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:50,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642520432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:50,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [982270154] [2022-11-19 07:11:51,014 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 07:11:51,015 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:11:51,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:11:51,026 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:11:51,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:11:56,487 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 135 for LOIs [2022-11-19 07:11:56,508 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 103 for LOIs [2022-11-19 07:11:56,515 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 131 for LOIs [2022-11-19 07:11:56,537 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 139 for LOIs [2022-11-19 07:11:57,024 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 135 for LOIs [2022-11-19 07:11:57,086 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 135 for LOIs [2022-11-19 07:11:57,149 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 135 for LOIs [2022-11-19 07:11:57,167 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 142 for LOIs [2022-11-19 07:11:57,181 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:12:19,116 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13049#(and (= ~q_req_up~0 1) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t1_pc~0 0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_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) (= 0 ~t4_pc~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 [2022-11-19 07:12:19,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:12:19,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:12:19,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 07:12:19,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995932963] [2022-11-19 07:12:19,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:12:19,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:12:19,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:12:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:12:19,138 INFO L87 Difference]: Start difference. First operand 903 states and 1247 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) [2022-11-19 07:12:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:19,726 INFO L93 Difference]: Finished difference Result 1692 states and 2215 transitions. [2022-11-19 07:12:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:12:19,727 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 [2022-11-19 07:12:19,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:19,737 INFO L225 Difference]: With dead ends: 1692 [2022-11-19 07:12:19,738 INFO L226 Difference]: Without dead ends: 1689 [2022-11-19 07:12:19,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:12:19,741 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 649 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:19,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 863 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:12:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-11-19 07:12:19,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1309. [2022-11-19 07:12:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 956 states have (on average 1.3514644351464435) internal successors, (1292), 962 states have internal predecessors, (1292), 209 states have call successors, (209), 143 states have call predecessors, (209), 142 states have return successors, (242), 205 states have call predecessors, (242), 208 states have call successors, (242) [2022-11-19 07:12:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 1743 transitions. [2022-11-19 07:12:19,913 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 1743 transitions. Word has length 55 [2022-11-19 07:12:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:19,914 INFO L495 AbstractCegarLoop]: Abstraction has 1309 states and 1743 transitions. [2022-11-19 07:12:19,914 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) [2022-11-19 07:12:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 1743 transitions. [2022-11-19 07:12:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 07:12:19,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:19,917 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] [2022-11-19 07:12:19,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:12:20,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 07:12:20,124 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:20,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:20,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1879662261, now seen corresponding path program 2 times [2022-11-19 07:12:20,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:20,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73211030] [2022-11-19 07:12:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:20,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:20,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:20,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73211030] [2022-11-19 07:12:20,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73211030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:20,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:20,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:12:20,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138030799] [2022-11-19 07:12:20,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:20,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:20,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:20,170 INFO L87 Difference]: Start difference. First operand 1309 states and 1743 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) [2022-11-19 07:12:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:20,364 INFO L93 Difference]: Finished difference Result 1730 states and 2260 transitions. [2022-11-19 07:12:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:20,365 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 [2022-11-19 07:12:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:20,371 INFO L225 Difference]: With dead ends: 1730 [2022-11-19 07:12:20,371 INFO L226 Difference]: Without dead ends: 1109 [2022-11-19 07:12:20,373 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 [2022-11-19 07:12:20,373 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 227 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:20,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 323 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-11-19 07:12:20,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1107. [2022-11-19 07:12:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 814 states have (on average 1.3513513513513513) internal successors, (1100), 820 states have internal predecessors, (1100), 177 states have call successors, (177), 115 states have call predecessors, (177), 114 states have return successors, (210), 173 states have call predecessors, (210), 176 states have call successors, (210) [2022-11-19 07:12:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1487 transitions. [2022-11-19 07:12:20,485 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1487 transitions. Word has length 58 [2022-11-19 07:12:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:20,486 INFO L495 AbstractCegarLoop]: Abstraction has 1107 states and 1487 transitions. [2022-11-19 07:12:20,486 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) [2022-11-19 07:12:20,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1487 transitions. [2022-11-19 07:12:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 07:12:20,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:20,488 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] [2022-11-19 07:12:20,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:12:20,489 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash -37125710, now seen corresponding path program 1 times [2022-11-19 07:12:20,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:20,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285641401] [2022-11-19 07:12:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:20,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:12:20,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:20,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285641401] [2022-11-19 07:12:20,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285641401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:20,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:20,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:12:20,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115091993] [2022-11-19 07:12:20,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:20,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:20,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:20,559 INFO L87 Difference]: Start difference. First operand 1107 states and 1487 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) [2022-11-19 07:12:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:20,754 INFO L93 Difference]: Finished difference Result 1742 states and 2265 transitions. [2022-11-19 07:12:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:20,755 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 [2022-11-19 07:12:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:20,761 INFO L225 Difference]: With dead ends: 1742 [2022-11-19 07:12:20,761 INFO L226 Difference]: Without dead ends: 1365 [2022-11-19 07:12:20,763 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 [2022-11-19 07:12:20,765 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 44 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:20,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 452 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2022-11-19 07:12:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1184. [2022-11-19 07:12:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 877 states have (on average 1.3489167616875712) internal successors, (1183), 883 states have internal predecessors, (1183), 184 states have call successors, (184), 122 states have call predecessors, (184), 121 states have return successors, (217), 180 states have call predecessors, (217), 183 states have call successors, (217) [2022-11-19 07:12:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1584 transitions. [2022-11-19 07:12:20,909 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1584 transitions. Word has length 61 [2022-11-19 07:12:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:20,911 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1584 transitions. [2022-11-19 07:12:20,911 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) [2022-11-19 07:12:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1584 transitions. [2022-11-19 07:12:20,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:12:20,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:20,913 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] [2022-11-19 07:12:20,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:12:20,914 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:20,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:20,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1062998245, now seen corresponding path program 1 times [2022-11-19 07:12:20,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:20,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762920020] [2022-11-19 07:12:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:20,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:12:21,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:21,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762920020] [2022-11-19 07:12:21,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762920020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:21,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:21,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:12:21,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007372354] [2022-11-19 07:12:21,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:21,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:12:21,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:21,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:12:21,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:12:21,128 INFO L87 Difference]: Start difference. First operand 1184 states and 1584 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) [2022-11-19 07:12:22,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:22,002 INFO L93 Difference]: Finished difference Result 2245 states and 2845 transitions. [2022-11-19 07:12:22,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:12:22,003 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 [2022-11-19 07:12:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:22,011 INFO L225 Difference]: With dead ends: 2245 [2022-11-19 07:12:22,012 INFO L226 Difference]: Without dead ends: 1554 [2022-11-19 07:12:22,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:12:22,015 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 364 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:22,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 736 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:12:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-11-19 07:12:22,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1505. [2022-11-19 07:12:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1093 states have (on average 1.3174748398902105) internal successors, (1440), 1099 states have internal predecessors, (1440), 240 states have call successors, (240), 171 states have call predecessors, (240), 170 states have return successors, (273), 236 states have call predecessors, (273), 239 states have call successors, (273) [2022-11-19 07:12:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 1953 transitions. [2022-11-19 07:12:22,213 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 1953 transitions. Word has length 70 [2022-11-19 07:12:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:22,213 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 1953 transitions. [2022-11-19 07:12:22,214 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) [2022-11-19 07:12:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 1953 transitions. [2022-11-19 07:12:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 07:12:22,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:22,221 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] [2022-11-19 07:12:22,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:12:22,222 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:22,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:22,222 INFO L85 PathProgramCache]: Analyzing trace with hash 537596719, now seen corresponding path program 1 times [2022-11-19 07:12:22,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:22,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473175212] [2022-11-19 07:12:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:22,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:12:22,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:22,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473175212] [2022-11-19 07:12:22,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473175212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:22,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:22,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:12:22,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149516449] [2022-11-19 07:12:22,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:22,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:22,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:22,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:22,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:22,282 INFO L87 Difference]: Start difference. First operand 1505 states and 1953 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) [2022-11-19 07:12:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:22,536 INFO L93 Difference]: Finished difference Result 2536 states and 3186 transitions. [2022-11-19 07:12:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:22,537 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 [2022-11-19 07:12:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:22,545 INFO L225 Difference]: With dead ends: 2536 [2022-11-19 07:12:22,545 INFO L226 Difference]: Without dead ends: 1679 [2022-11-19 07:12:22,548 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 [2022-11-19 07:12:22,548 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 39 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:22,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 446 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:22,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2022-11-19 07:12:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1550. [2022-11-19 07:12:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1130 states have (on average 1.3132743362831858) internal successors, (1484), 1136 states have internal predecessors, (1484), 244 states have call successors, (244), 175 states have call predecessors, (244), 174 states have return successors, (277), 240 states have call predecessors, (277), 243 states have call successors, (277) [2022-11-19 07:12:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2005 transitions. [2022-11-19 07:12:22,765 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2005 transitions. Word has length 71 [2022-11-19 07:12:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:22,765 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 2005 transitions. [2022-11-19 07:12:22,766 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) [2022-11-19 07:12:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2005 transitions. [2022-11-19 07:12:22,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:12:22,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:22,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:22,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:12:22,769 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:22,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:22,770 INFO L85 PathProgramCache]: Analyzing trace with hash -874818469, now seen corresponding path program 1 times [2022-11-19 07:12:22,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:22,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582306080] [2022-11-19 07:12:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:22,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:12:22,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:22,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582306080] [2022-11-19 07:12:22,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582306080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:22,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155820429] [2022-11-19 07:12:22,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:22,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:22,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:22,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:22,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:12:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:23,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:12:23,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:12:23,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:23,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155820429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:23,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:23,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:12:23,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113852684] [2022-11-19 07:12:23,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:23,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:23,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:23,104 INFO L87 Difference]: Start difference. First operand 1550 states and 2005 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2022-11-19 07:12:23,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:23,404 INFO L93 Difference]: Finished difference Result 2498 states and 3510 transitions. [2022-11-19 07:12:23,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:23,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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 87 [2022-11-19 07:12:23,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:23,413 INFO L225 Difference]: With dead ends: 2498 [2022-11-19 07:12:23,414 INFO L226 Difference]: Without dead ends: 2016 [2022-11-19 07:12:23,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:23,417 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 218 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:23,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 340 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:23,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2022-11-19 07:12:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 2009. [2022-11-19 07:12:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1492 states have (on average 1.3451742627345844) internal successors, (2007), 1501 states have internal predecessors, (2007), 311 states have call successors, (311), 205 states have call predecessors, (311), 204 states have return successors, (374), 304 states have call predecessors, (374), 310 states have call successors, (374) [2022-11-19 07:12:23,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2692 transitions. [2022-11-19 07:12:23,668 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2692 transitions. Word has length 87 [2022-11-19 07:12:23,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:23,668 INFO L495 AbstractCegarLoop]: Abstraction has 2009 states and 2692 transitions. [2022-11-19 07:12:23,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2022-11-19 07:12:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2692 transitions. [2022-11-19 07:12:23,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:12:23,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:23,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:23,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:23,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:23,879 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:23,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:23,879 INFO L85 PathProgramCache]: Analyzing trace with hash -478338791, now seen corresponding path program 1 times [2022-11-19 07:12:23,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:23,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38876456] [2022-11-19 07:12:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:23,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:12:24,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:24,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38876456] [2022-11-19 07:12:24,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38876456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:24,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484891566] [2022-11-19 07:12:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:24,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:24,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:24,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:24,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:12:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:24,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:12:24,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:12:24,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:24,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484891566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:24,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:24,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:12:24,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109423745] [2022-11-19 07:12:24,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:24,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:24,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:24,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:24,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:24,224 INFO L87 Difference]: Start difference. First operand 2009 states and 2692 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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) [2022-11-19 07:12:24,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:24,614 INFO L93 Difference]: Finished difference Result 3860 states and 5600 transitions. [2022-11-19 07:12:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:24,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 87 [2022-11-19 07:12:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:24,628 INFO L225 Difference]: With dead ends: 3860 [2022-11-19 07:12:24,629 INFO L226 Difference]: Without dead ends: 2919 [2022-11-19 07:12:24,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:12:24,635 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 221 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:24,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 340 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2022-11-19 07:12:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2907. [2022-11-19 07:12:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2201 states have (on average 1.3734666060881418) internal successors, (3023), 2216 states have internal predecessors, (3023), 440 states have call successors, (440), 265 states have call predecessors, (440), 264 states have return successors, (559), 427 states have call predecessors, (559), 439 states have call successors, (559) [2022-11-19 07:12:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4022 transitions. [2022-11-19 07:12:24,994 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4022 transitions. Word has length 87 [2022-11-19 07:12:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:24,994 INFO L495 AbstractCegarLoop]: Abstraction has 2907 states and 4022 transitions. [2022-11-19 07:12:24,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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) [2022-11-19 07:12:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4022 transitions. [2022-11-19 07:12:24,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:12:24,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:24,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:25,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:25,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:25,206 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:25,207 INFO L85 PathProgramCache]: Analyzing trace with hash -112315493, now seen corresponding path program 1 times [2022-11-19 07:12:25,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:25,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608281968] [2022-11-19 07:12:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:25,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:12:25,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:25,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608281968] [2022-11-19 07:12:25,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608281968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:25,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:25,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:12:25,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022059802] [2022-11-19 07:12:25,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:25,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:25,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:25,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:25,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:25,291 INFO L87 Difference]: Start difference. First operand 2907 states and 4022 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-11-19 07:12:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:25,701 INFO L93 Difference]: Finished difference Result 4805 states and 6991 transitions. [2022-11-19 07:12:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:25,702 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), 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 87 [2022-11-19 07:12:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:25,721 INFO L225 Difference]: With dead ends: 4805 [2022-11-19 07:12:25,721 INFO L226 Difference]: Without dead ends: 3331 [2022-11-19 07:12:25,727 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 [2022-11-19 07:12:25,728 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 65 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:25,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 485 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:25,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2022-11-19 07:12:26,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 3151. [2022-11-19 07:12:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3151 states, 2429 states have (on average 1.4042815973651708) internal successors, (3411), 2444 states have internal predecessors, (3411), 448 states have call successors, (448), 273 states have call predecessors, (448), 272 states have return successors, (567), 435 states have call predecessors, (567), 447 states have call successors, (567) [2022-11-19 07:12:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 4426 transitions. [2022-11-19 07:12:26,073 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 4426 transitions. Word has length 87 [2022-11-19 07:12:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:26,074 INFO L495 AbstractCegarLoop]: Abstraction has 3151 states and 4426 transitions. [2022-11-19 07:12:26,074 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), 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) [2022-11-19 07:12:26,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 4426 transitions. [2022-11-19 07:12:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 07:12:26,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:26,080 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] [2022-11-19 07:12:26,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:12:26,080 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:26,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1591190531, now seen corresponding path program 1 times [2022-11-19 07:12:26,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:26,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200783604] [2022-11-19 07:12:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:26,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:12:26,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:26,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200783604] [2022-11-19 07:12:26,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200783604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:26,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447737187] [2022-11-19 07:12:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:26,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:26,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:26,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:26,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:12:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:26,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:12:26,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:12:26,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:26,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447737187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:26,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:26,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-19 07:12:26,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693887981] [2022-11-19 07:12:26,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:26,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:26,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:26,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:26,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:12:26,819 INFO L87 Difference]: Start difference. First operand 3151 states and 4426 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) [2022-11-19 07:12:27,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:27,236 INFO L93 Difference]: Finished difference Result 3980 states and 5444 transitions. [2022-11-19 07:12:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:27,237 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 [2022-11-19 07:12:27,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:27,253 INFO L225 Difference]: With dead ends: 3980 [2022-11-19 07:12:27,253 INFO L226 Difference]: Without dead ends: 3180 [2022-11-19 07:12:27,257 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 [2022-11-19 07:12:27,258 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 47 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:27,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 452 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:12:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2022-11-19 07:12:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3147. [2022-11-19 07:12:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3147 states, 2425 states have (on average 1.3917525773195876) internal successors, (3375), 2440 states have internal predecessors, (3375), 448 states have call successors, (448), 273 states have call predecessors, (448), 272 states have return successors, (567), 435 states have call predecessors, (567), 447 states have call successors, (567) [2022-11-19 07:12:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 4390 transitions. [2022-11-19 07:12:27,623 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 4390 transitions. Word has length 102 [2022-11-19 07:12:27,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:27,624 INFO L495 AbstractCegarLoop]: Abstraction has 3147 states and 4390 transitions. [2022-11-19 07:12:27,624 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) [2022-11-19 07:12:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 4390 transitions. [2022-11-19 07:12:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 07:12:27,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:27,630 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] [2022-11-19 07:12:27,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:27,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:12:27,836 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:27,836 INFO L85 PathProgramCache]: Analyzing trace with hash -14632772, now seen corresponding path program 1 times [2022-11-19 07:12:27,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:27,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005044017] [2022-11-19 07:12:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:27,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:12:28,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:28,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005044017] [2022-11-19 07:12:28,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005044017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:28,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559676266] [2022-11-19 07:12:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:28,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:28,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:28,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:28,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:12:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:28,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:12:28,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:12:28,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:28,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559676266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:28,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:28,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-19 07:12:28,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895470093] [2022-11-19 07:12:28,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:28,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:12:28,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:28,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:12:28,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:12:28,529 INFO L87 Difference]: Start difference. First operand 3147 states and 4390 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) [2022-11-19 07:12:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:29,078 INFO L93 Difference]: Finished difference Result 4033 states and 5461 transitions. [2022-11-19 07:12:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:12:29,079 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 [2022-11-19 07:12:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:29,093 INFO L225 Difference]: With dead ends: 4033 [2022-11-19 07:12:29,093 INFO L226 Difference]: Without dead ends: 2980 [2022-11-19 07:12:29,096 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 [2022-11-19 07:12:29,097 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 219 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:29,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 946 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:12:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2022-11-19 07:12:29,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 2783. [2022-11-19 07:12:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2192 states have (on average 1.414689781021898) internal successors, (3101), 2207 states have internal predecessors, (3101), 377 states have call successors, (377), 213 states have call predecessors, (377), 212 states have return successors, (496), 364 states have call predecessors, (496), 376 states have call successors, (496) [2022-11-19 07:12:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 3974 transitions. [2022-11-19 07:12:29,416 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 3974 transitions. Word has length 102 [2022-11-19 07:12:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:29,416 INFO L495 AbstractCegarLoop]: Abstraction has 2783 states and 3974 transitions. [2022-11-19 07:12:29,417 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) [2022-11-19 07:12:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 3974 transitions. [2022-11-19 07:12:29,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:12:29,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:29,425 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:29,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:29,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:12:29,631 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2111946144, now seen corresponding path program 1 times [2022-11-19 07:12:29,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:29,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367978617] [2022-11-19 07:12:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:29,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:12:29,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:29,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367978617] [2022-11-19 07:12:29,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367978617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:29,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:29,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:12:29,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457952075] [2022-11-19 07:12:29,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:29,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:12:29,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:12:29,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:12:29,704 INFO L87 Difference]: Start difference. First operand 2783 states and 3974 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 07:12:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:30,189 INFO L93 Difference]: Finished difference Result 3402 states and 4716 transitions. [2022-11-19 07:12:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:12:30,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 112 [2022-11-19 07:12:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:30,202 INFO L225 Difference]: With dead ends: 3402 [2022-11-19 07:12:30,203 INFO L226 Difference]: Without dead ends: 2782 [2022-11-19 07:12:30,206 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 [2022-11-19 07:12:30,206 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 279 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:30,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 411 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:12:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2022-11-19 07:12:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 2773. [2022-11-19 07:12:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2773 states, 2182 states have (on average 1.4046746104491292) internal successors, (3065), 2197 states have internal predecessors, (3065), 377 states have call successors, (377), 213 states have call predecessors, (377), 212 states have return successors, (496), 364 states have call predecessors, (496), 376 states have call successors, (496) [2022-11-19 07:12:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 3938 transitions. [2022-11-19 07:12:30,647 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 3938 transitions. Word has length 112 [2022-11-19 07:12:30,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:30,647 INFO L495 AbstractCegarLoop]: Abstraction has 2773 states and 3938 transitions. [2022-11-19 07:12:30,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 07:12:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 3938 transitions. [2022-11-19 07:12:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:12:30,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:30,654 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] [2022-11-19 07:12:30,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:12:30,655 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:30,656 INFO L85 PathProgramCache]: Analyzing trace with hash -289578977, now seen corresponding path program 1 times [2022-11-19 07:12:30,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:30,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287194161] [2022-11-19 07:12:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:30,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:12:30,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:30,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287194161] [2022-11-19 07:12:30,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287194161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:30,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937063422] [2022-11-19 07:12:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:30,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:30,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:30,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:30,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:12:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:30,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:12:30,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:12:31,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:31,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937063422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:31,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:31,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 07:12:31,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963689882] [2022-11-19 07:12:31,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:31,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:12:31,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:31,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:12:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:12:31,074 INFO L87 Difference]: Start difference. First operand 2773 states and 3938 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) [2022-11-19 07:12:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:31,639 INFO L93 Difference]: Finished difference Result 3322 states and 4563 transitions. [2022-11-19 07:12:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:12:31,640 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 [2022-11-19 07:12:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:31,666 INFO L225 Difference]: With dead ends: 3322 [2022-11-19 07:12:31,666 INFO L226 Difference]: Without dead ends: 2729 [2022-11-19 07:12:31,668 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 [2022-11-19 07:12:31,669 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 67 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:31,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1162 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:12:31,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2022-11-19 07:12:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2637. [2022-11-19 07:12:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2082 states have (on average 1.4159462055715657) internal successors, (2948), 2097 states have internal predecessors, (2948), 358 states have call successors, (358), 196 states have call predecessors, (358), 195 states have return successors, (477), 345 states have call predecessors, (477), 357 states have call successors, (477) [2022-11-19 07:12:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3783 transitions. [2022-11-19 07:12:31,955 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3783 transitions. Word has length 112 [2022-11-19 07:12:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:31,955 INFO L495 AbstractCegarLoop]: Abstraction has 2637 states and 3783 transitions. [2022-11-19 07:12:31,956 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) [2022-11-19 07:12:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3783 transitions. [2022-11-19 07:12:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 07:12:31,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:31,962 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] [2022-11-19 07:12:31,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:32,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:12:32,169 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:32,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:32,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1402473301, now seen corresponding path program 1 times [2022-11-19 07:12:32,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:32,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006363955] [2022-11-19 07:12:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:32,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:12:32,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006363955] [2022-11-19 07:12:32,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006363955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275627468] [2022-11-19 07:12:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:32,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:32,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:32,323 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:32,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:12:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:12:32,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:12:32,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:32,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275627468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:32,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:12:32,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-19 07:12:32,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865293539] [2022-11-19 07:12:32,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:32,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:12:32,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:12:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:12:32,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:12:32,556 INFO L87 Difference]: Start difference. First operand 2637 states and 3783 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) [2022-11-19 07:12:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:33,087 INFO L93 Difference]: Finished difference Result 3386 states and 4628 transitions. [2022-11-19 07:12:33,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:12:33,087 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 [2022-11-19 07:12:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:33,098 INFO L225 Difference]: With dead ends: 3386 [2022-11-19 07:12:33,098 INFO L226 Difference]: Without dead ends: 2929 [2022-11-19 07:12:33,100 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 [2022-11-19 07:12:33,101 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 203 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:33,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1014 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:12:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2022-11-19 07:12:33,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 2895. [2022-11-19 07:12:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2895 states, 2244 states have (on average 1.393939393939394) internal successors, (3128), 2265 states have internal predecessors, (3128), 406 states have call successors, (406), 238 states have call predecessors, (406), 243 states have return successors, (537), 393 states have call predecessors, (537), 405 states have call successors, (537) [2022-11-19 07:12:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2895 states to 2895 states and 4071 transitions. [2022-11-19 07:12:33,425 INFO L78 Accepts]: Start accepts. Automaton has 2895 states and 4071 transitions. Word has length 113 [2022-11-19 07:12:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:33,425 INFO L495 AbstractCegarLoop]: Abstraction has 2895 states and 4071 transitions. [2022-11-19 07:12:33,426 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) [2022-11-19 07:12:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2895 states and 4071 transitions. [2022-11-19 07:12:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:12:33,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:33,433 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] [2022-11-19 07:12:33,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:33,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:33,640 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:33,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:33,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1324653244, now seen corresponding path program 1 times [2022-11-19 07:12:33,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:12:33,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089734783] [2022-11-19 07:12:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:33,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:12:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:12:34,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:12:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089734783] [2022-11-19 07:12:34,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089734783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:12:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191177878] [2022-11-19 07:12:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:34,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:34,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:34,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:34,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:12:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:34,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 07:12:34,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:12:35,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:12:37,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191177878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:37,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1088453947] [2022-11-19 07:12:37,908 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 07:12:37,908 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:12:37,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:12:37,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:12:37,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:13:13,923 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 232 for LOIs [2022-11-19 07:13:14,428 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 183 for LOIs [2022-11-19 07:13:14,473 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 174 for LOIs [2022-11-19 07:13:14,520 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 244 for LOIs [2022-11-19 07:13:16,131 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 142 for LOIs [2022-11-19 07:13:16,344 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 88 for LOIs [2022-11-19 07:13:16,513 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 236 for LOIs [2022-11-19 07:13:17,104 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 259 for LOIs [2022-11-19 07:13:17,468 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:14:12,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '114365#(and (<= 0 |#NULL.base|) (= 0 ~t5_pc~0) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (= 0 ~t5_st~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 1 ~c_dr_st~0) (<= ~local~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_3~0) (<= 0 ~t5_i~0) (<= ~q_req_up~0 1) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= |#NULL.base| 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= 2 ~T5_E~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0))' at error location [2022-11-19 07:14:12,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:14:12,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:14:12,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-19 07:14:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893886207] [2022-11-19 07:14:12,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:14:12,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 07:14:12,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 07:14:12,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=10562, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 07:14:12,231 INFO L87 Difference]: Start difference. First operand 2895 states and 4071 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) [2022-11-19 07:14:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:37,091 INFO L93 Difference]: Finished difference Result 5406 states and 6987 transitions. [2022-11-19 07:14:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-19 07:14:37,092 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 [2022-11-19 07:14:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:37,105 INFO L225 Difference]: With dead ends: 5406 [2022-11-19 07:14:37,106 INFO L226 Difference]: Without dead ends: 4691 [2022-11-19 07:14:37,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44221 ImplicationChecksByTransitivity, 74.2s TimeCoverageRelationStatistics Valid=10067, Invalid=99163, Unknown=0, NotChecked=0, Total=109230 [2022-11-19 07:14:37,125 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 5262 mSDsluCounter, 2225 mSDsCounter, 0 mSdLazyCounter, 6575 mSolverCounterSat, 2936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5263 SdHoareTripleChecker+Valid, 2422 SdHoareTripleChecker+Invalid, 9511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2936 IncrementalHoareTripleChecker+Valid, 6575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:37,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5263 Valid, 2422 Invalid, 9511 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2936 Valid, 6575 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-19 07:14:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-11-19 07:14:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 3171. [2022-11-19 07:14:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3171 states, 2428 states have (on average 1.3752059308072488) internal successors, (3339), 2451 states have internal predecessors, (3339), 451 states have call successors, (451), 275 states have call predecessors, (451), 290 states have return successors, (594), 446 states have call predecessors, (594), 450 states have call successors, (594) [2022-11-19 07:14:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 4384 transitions. [2022-11-19 07:14:37,568 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 4384 transitions. Word has length 114 [2022-11-19 07:14:37,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:37,569 INFO L495 AbstractCegarLoop]: Abstraction has 3171 states and 4384 transitions. [2022-11-19 07:14:37,569 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) [2022-11-19 07:14:37,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 4384 transitions. [2022-11-19 07:14:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:14:37,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:37,576 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] [2022-11-19 07:14:37,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:37,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:37,783 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1041599134, now seen corresponding path program 1 times [2022-11-19 07:14:37,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:37,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020723462] [2022-11-19 07:14:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:37,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:14:38,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:38,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020723462] [2022-11-19 07:14:38,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020723462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:38,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797811951] [2022-11-19 07:14:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:38,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:38,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:38,194 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:38,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:14:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:38,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:14:38,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:14:38,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:14:38,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797811951] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:38,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:14:38,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-19 07:14:38,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322965388] [2022-11-19 07:14:38,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:38,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:14:38,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:38,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:14:38,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:14:38,670 INFO L87 Difference]: Start difference. First operand 3171 states and 4384 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) [2022-11-19 07:14:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:39,773 INFO L93 Difference]: Finished difference Result 4495 states and 5932 transitions. [2022-11-19 07:14:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:14:39,774 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 [2022-11-19 07:14:39,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:39,785 INFO L225 Difference]: With dead ends: 4495 [2022-11-19 07:14:39,785 INFO L226 Difference]: Without dead ends: 3504 [2022-11-19 07:14:39,789 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 [2022-11-19 07:14:39,790 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 327 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:39,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 574 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:14:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2022-11-19 07:14:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 3251. [2022-11-19 07:14:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2473 states have (on average 1.3708046906591185) internal successors, (3390), 2499 states have internal predecessors, (3390), 470 states have call successors, (470), 284 states have call predecessors, (470), 306 states have return successors, (634), 469 states have call predecessors, (634), 469 states have call successors, (634) [2022-11-19 07:14:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4494 transitions. [2022-11-19 07:14:40,267 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4494 transitions. Word has length 115 [2022-11-19 07:14:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:40,268 INFO L495 AbstractCegarLoop]: Abstraction has 3251 states and 4494 transitions. [2022-11-19 07:14:40,268 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) [2022-11-19 07:14:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4494 transitions. [2022-11-19 07:14:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:14:40,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:40,276 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] [2022-11-19 07:14:40,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:40,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 07:14:40,482 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:40,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:40,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1845501430, now seen corresponding path program 1 times [2022-11-19 07:14:40,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:40,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059077842] [2022-11-19 07:14:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:40,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-19 07:14:40,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:40,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059077842] [2022-11-19 07:14:40,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059077842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:40,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:40,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:40,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682680535] [2022-11-19 07:14:40,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:40,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:40,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:40,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:40,553 INFO L87 Difference]: Start difference. First operand 3251 states and 4494 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-19 07:14:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:41,371 INFO L93 Difference]: Finished difference Result 7328 states and 10863 transitions. [2022-11-19 07:14:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 116 [2022-11-19 07:14:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:41,391 INFO L225 Difference]: With dead ends: 7328 [2022-11-19 07:14:41,392 INFO L226 Difference]: Without dead ends: 5245 [2022-11-19 07:14:41,399 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 [2022-11-19 07:14:41,399 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 212 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:41,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 340 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:41,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2022-11-19 07:14:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 5215. [2022-11-19 07:14:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5215 states, 4053 states have (on average 1.4009375771033803) internal successors, (5678), 4091 states have internal predecessors, (5678), 726 states have call successors, (726), 412 states have call predecessors, (726), 434 states have return successors, (994), 713 states have call predecessors, (994), 725 states have call successors, (994) [2022-11-19 07:14:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5215 states to 5215 states and 7398 transitions. [2022-11-19 07:14:42,210 INFO L78 Accepts]: Start accepts. Automaton has 5215 states and 7398 transitions. Word has length 116 [2022-11-19 07:14:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:42,210 INFO L495 AbstractCegarLoop]: Abstraction has 5215 states and 7398 transitions. [2022-11-19 07:14:42,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-19 07:14:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5215 states and 7398 transitions. [2022-11-19 07:14:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:14:42,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:42,222 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] [2022-11-19 07:14:42,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-19 07:14:42,223 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:42,223 INFO L85 PathProgramCache]: Analyzing trace with hash -25195802, now seen corresponding path program 1 times [2022-11-19 07:14:42,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:42,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86094804] [2022-11-19 07:14:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:42,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-19 07:14:42,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:42,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86094804] [2022-11-19 07:14:42,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86094804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:42,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:42,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291751629] [2022-11-19 07:14:42,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:42,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:42,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:42,289 INFO L87 Difference]: Start difference. First operand 5215 states and 7398 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-19 07:14:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:43,453 INFO L93 Difference]: Finished difference Result 13132 states and 19599 transitions. [2022-11-19 07:14:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:43,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 116 [2022-11-19 07:14:43,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:43,488 INFO L225 Difference]: With dead ends: 13132 [2022-11-19 07:14:43,488 INFO L226 Difference]: Without dead ends: 9085 [2022-11-19 07:14:43,506 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 [2022-11-19 07:14:43,507 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 215 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:43,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 340 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:43,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9085 states. [2022-11-19 07:14:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 9027. [2022-11-19 07:14:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9027 states, 7117 states have (on average 1.4137979485738372) internal successors, (10062), 7179 states have internal predecessors, (10062), 1218 states have call successors, (1218), 668 states have call predecessors, (1218), 690 states have return successors, (1678), 1181 states have call predecessors, (1678), 1217 states have call successors, (1678) [2022-11-19 07:14:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9027 states to 9027 states and 12958 transitions. [2022-11-19 07:14:44,750 INFO L78 Accepts]: Start accepts. Automaton has 9027 states and 12958 transitions. Word has length 116 [2022-11-19 07:14:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:44,750 INFO L495 AbstractCegarLoop]: Abstraction has 9027 states and 12958 transitions. [2022-11-19 07:14:44,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-19 07:14:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 9027 states and 12958 transitions. [2022-11-19 07:14:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:14:44,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:44,770 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] [2022-11-19 07:14:44,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-19 07:14:44,770 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:44,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:44,771 INFO L85 PathProgramCache]: Analyzing trace with hash -973554334, now seen corresponding path program 1 times [2022-11-19 07:14:44,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:44,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850422756] [2022-11-19 07:14:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:44,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:14:45,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:45,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850422756] [2022-11-19 07:14:45,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850422756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:45,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134295743] [2022-11-19 07:14:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:45,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:45,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:45,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:45,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:14:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 07:14:46,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:14:46,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:14:48,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134295743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:48,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364102937] [2022-11-19 07:14:48,885 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 07:14:48,886 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:14:48,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:14:48,886 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:14:48,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:14:59,820 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 232 for LOIs [2022-11-19 07:15:00,440 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 180 for LOIs [2022-11-19 07:15:00,482 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 176 for LOIs [2022-11-19 07:15:00,530 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 244 for LOIs [2022-11-19 07:15:02,330 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 142 for LOIs [2022-11-19 07:15:02,541 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 90 for LOIs [2022-11-19 07:15:02,712 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 236 for LOIs [2022-11-19 07:15:03,198 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 259 for LOIs [2022-11-19 07:15:03,628 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:15:53,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '189752#(and (= ~q_req_up~0 1) (= 0 ~t5_pc~0) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 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) (<= ~p_dw_st~0 2) (= 0 ~t5_st~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= ~local~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_3~0) (<= 0 ~t5_i~0) (<= 0 ~token~0) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= 2 ~T5_E~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (= |#NULL.base| 0))' at error location [2022-11-19 07:15:53,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:15:53,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:15:53,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-19 07:15:53,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975512706] [2022-11-19 07:15:53,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:15:53,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-19 07:15:53,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:15:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-19 07:15:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=940, Invalid=11270, Unknown=0, NotChecked=0, Total=12210 [2022-11-19 07:15:53,969 INFO L87 Difference]: Start difference. First operand 9027 states and 12958 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) [2022-11-19 07:16:11,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:11,715 INFO L93 Difference]: Finished difference Result 11311 states and 15660 transitions. [2022-11-19 07:16:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-19 07:16:11,716 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 [2022-11-19 07:16:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:11,744 INFO L225 Difference]: With dead ends: 11311 [2022-11-19 07:16:11,744 INFO L226 Difference]: Without dead ends: 10240 [2022-11-19 07:16:11,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 313 SyntacticMatches, 11 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27355 ImplicationChecksByTransitivity, 62.2s TimeCoverageRelationStatistics Valid=6738, Invalid=61644, Unknown=0, NotChecked=0, Total=68382 [2022-11-19 07:16:11,757 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 5262 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 6341 mSolverCounterSat, 3435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5262 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 9776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3435 IncrementalHoareTripleChecker+Valid, 6341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:11,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5262 Valid, 2200 Invalid, 9776 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3435 Valid, 6341 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-19 07:16:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10240 states. [2022-11-19 07:16:13,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10240 to 8843. [2022-11-19 07:16:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8843 states, 7005 states have (on average 1.4181299072091362) internal successors, (9934), 7066 states have internal predecessors, (9934), 1178 states have call successors, (1178), 636 states have call predecessors, (1178), 658 states have return successors, (1628), 1142 states have call predecessors, (1628), 1177 states have call successors, (1628) [2022-11-19 07:16:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8843 states to 8843 states and 12740 transitions. [2022-11-19 07:16:13,069 INFO L78 Accepts]: Start accepts. Automaton has 8843 states and 12740 transitions. Word has length 124 [2022-11-19 07:16:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:13,069 INFO L495 AbstractCegarLoop]: Abstraction has 8843 states and 12740 transitions. [2022-11-19 07:16:13,069 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) [2022-11-19 07:16:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states and 12740 transitions. [2022-11-19 07:16:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:16:13,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:13,089 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] [2022-11-19 07:16:13,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:13,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:13,296 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:13,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:13,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1231372334, now seen corresponding path program 1 times [2022-11-19 07:16:13,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:13,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17082148] [2022-11-19 07:16:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:13,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:16:13,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:13,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17082148] [2022-11-19 07:16:13,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17082148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:13,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704302395] [2022-11-19 07:16:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:13,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:13,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:13,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:13,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:16:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:13,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:16:13,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:16:13,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:16:14,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704302395] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:14,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:16:14,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-19 07:16:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110395806] [2022-11-19 07:16:14,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:14,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:16:14,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:14,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:16:14,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:16:14,042 INFO L87 Difference]: Start difference. First operand 8843 states and 12740 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) [2022-11-19 07:16:15,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:15,947 INFO L93 Difference]: Finished difference Result 9498 states and 13481 transitions. [2022-11-19 07:16:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:16:15,947 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 [2022-11-19 07:16:15,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:15,970 INFO L225 Difference]: With dead ends: 9498 [2022-11-19 07:16:15,970 INFO L226 Difference]: Without dead ends: 8611 [2022-11-19 07:16:15,974 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 [2022-11-19 07:16:15,975 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 464 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:15,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 544 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:16:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8611 states. [2022-11-19 07:16:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8611 to 8574. [2022-11-19 07:16:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8574 states, 6806 states have (on average 1.4235968263297092) internal successors, (9689), 6867 states have internal predecessors, (9689), 1142 states have call successors, (1142), 606 states have call predecessors, (1142), 624 states have return successors, (1587), 1102 states have call predecessors, (1587), 1141 states have call successors, (1587) [2022-11-19 07:16:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8574 states to 8574 states and 12418 transitions. [2022-11-19 07:16:17,292 INFO L78 Accepts]: Start accepts. Automaton has 8574 states and 12418 transitions. Word has length 125 [2022-11-19 07:16:17,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:17,292 INFO L495 AbstractCegarLoop]: Abstraction has 8574 states and 12418 transitions. [2022-11-19 07:16:17,292 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) [2022-11-19 07:16:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8574 states and 12418 transitions. [2022-11-19 07:16:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-19 07:16:17,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:17,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:17,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:17,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 07:16:17,517 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:17,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1481964436, now seen corresponding path program 1 times [2022-11-19 07:16:17,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:17,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783258986] [2022-11-19 07:16:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:17,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 07:16:17,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:17,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783258986] [2022-11-19 07:16:17,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783258986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:17,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266631515] [2022-11-19 07:16:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:17,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:17,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:17,647 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:17,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:16:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:17,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:16:17,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:16:17,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:17,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266631515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:17,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:17,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:16:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195152951] [2022-11-19 07:16:17,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:17,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:17,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:17,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:17,906 INFO L87 Difference]: Start difference. First operand 8574 states and 12418 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, (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) [2022-11-19 07:16:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:19,434 INFO L93 Difference]: Finished difference Result 15289 states and 22327 transitions. [2022-11-19 07:16:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:19,435 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, (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 134 [2022-11-19 07:16:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:19,457 INFO L225 Difference]: With dead ends: 15289 [2022-11-19 07:16:19,457 INFO L226 Difference]: Without dead ends: 10631 [2022-11-19 07:16:19,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:19,480 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 209 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:19,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 257 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:19,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10631 states. [2022-11-19 07:16:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10631 to 10631. [2022-11-19 07:16:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10631 states, 8628 states have (on average 1.3860686138154845) internal successors, (11959), 8689 states have internal predecessors, (11959), 1219 states have call successors, (1219), 763 states have call predecessors, (1219), 782 states have return successors, (1726), 1180 states have call predecessors, (1726), 1218 states have call successors, (1726) [2022-11-19 07:16:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10631 states to 10631 states and 14904 transitions. [2022-11-19 07:16:20,868 INFO L78 Accepts]: Start accepts. Automaton has 10631 states and 14904 transitions. Word has length 134 [2022-11-19 07:16:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:20,869 INFO L495 AbstractCegarLoop]: Abstraction has 10631 states and 14904 transitions. [2022-11-19 07:16:20,869 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, (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) [2022-11-19 07:16:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 10631 states and 14904 transitions. [2022-11-19 07:16:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-19 07:16:20,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:20,885 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:20,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:21,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 07:16:21,086 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:21,086 INFO L85 PathProgramCache]: Analyzing trace with hash -562989813, now seen corresponding path program 1 times [2022-11-19 07:16:21,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:21,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337118783] [2022-11-19 07:16:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:21,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 07:16:21,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:21,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337118783] [2022-11-19 07:16:21,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337118783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:21,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088468431] [2022-11-19 07:16:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:21,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:21,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:21,195 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:21,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:16:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:21,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:16:21,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:16:21,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:21,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088468431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:21,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:21,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:16:21,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601312316] [2022-11-19 07:16:21,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:21,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:21,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:21,424 INFO L87 Difference]: Start difference. First operand 10631 states and 14904 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2022-11-19 07:16:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:23,468 INFO L93 Difference]: Finished difference Result 19652 states and 28182 transitions. [2022-11-19 07:16:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 134 [2022-11-19 07:16:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:23,504 INFO L225 Difference]: With dead ends: 19652 [2022-11-19 07:16:23,505 INFO L226 Difference]: Without dead ends: 14554 [2022-11-19 07:16:23,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:23,519 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 96 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:23,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 508 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:23,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14554 states. [2022-11-19 07:16:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14554 to 12079. [2022-11-19 07:16:25,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12079 states, 9964 states have (on average 1.424227217984745) internal successors, (14191), 10025 states have internal predecessors, (14191), 1275 states have call successors, (1275), 819 states have call predecessors, (1275), 838 states have return successors, (1782), 1236 states have call predecessors, (1782), 1274 states have call successors, (1782) [2022-11-19 07:16:25,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12079 states to 12079 states and 17248 transitions. [2022-11-19 07:16:25,354 INFO L78 Accepts]: Start accepts. Automaton has 12079 states and 17248 transitions. Word has length 134 [2022-11-19 07:16:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:25,355 INFO L495 AbstractCegarLoop]: Abstraction has 12079 states and 17248 transitions. [2022-11-19 07:16:25,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2022-11-19 07:16:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 12079 states and 17248 transitions. [2022-11-19 07:16:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-19 07:16:25,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:25,374 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:25,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:25,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:25,574 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:25,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:25,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1405926646, now seen corresponding path program 2 times [2022-11-19 07:16:25,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:25,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618241391] [2022-11-19 07:16:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:25,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:16:25,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:25,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618241391] [2022-11-19 07:16:25,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618241391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:25,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695162459] [2022-11-19 07:16:25,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:16:25,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:25,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:25,812 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:25,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:16:25,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:16:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:16:25,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:16:25,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:16:26,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:26,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695162459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:26,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:26,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:16:26,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937272882] [2022-11-19 07:16:26,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:26,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:26,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:26,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:16:26,034 INFO L87 Difference]: Start difference. First operand 12079 states and 17248 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2022-11-19 07:16:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:28,218 INFO L93 Difference]: Finished difference Result 23650 states and 34755 transitions. [2022-11-19 07:16:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:28,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 134 [2022-11-19 07:16:28,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:28,268 INFO L225 Difference]: With dead ends: 23650 [2022-11-19 07:16:28,268 INFO L226 Difference]: Without dead ends: 16913 [2022-11-19 07:16:28,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:16:28,291 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 118 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:28,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 519 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16913 states. [2022-11-19 07:16:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16913 to 16623. [2022-11-19 07:16:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16623 states, 13761 states have (on average 1.422861710631495) internal successors, (19580), 13838 states have internal predecessors, (19580), 1729 states have call successors, (1729), 1113 states have call predecessors, (1729), 1131 states have return successors, (2663), 1673 states have call predecessors, (2663), 1728 states have call successors, (2663) [2022-11-19 07:16:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16623 states to 16623 states and 23972 transitions. [2022-11-19 07:16:30,929 INFO L78 Accepts]: Start accepts. Automaton has 16623 states and 23972 transitions. Word has length 134 [2022-11-19 07:16:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:30,929 INFO L495 AbstractCegarLoop]: Abstraction has 16623 states and 23972 transitions. [2022-11-19 07:16:30,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2022-11-19 07:16:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 16623 states and 23972 transitions. [2022-11-19 07:16:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-19 07:16:30,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:30,952 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 07:16:30,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:31,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 07:16:31,155 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:31,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1871695446, now seen corresponding path program 1 times [2022-11-19 07:16:31,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:31,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574988673] [2022-11-19 07:16:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:31,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-19 07:16:31,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:31,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574988673] [2022-11-19 07:16:31,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574988673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:31,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165415761] [2022-11-19 07:16:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:31,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:31,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:31,387 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:31,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:16:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:16:31,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:16:31,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:31,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165415761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:31,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:31,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:16:31,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957455965] [2022-11-19 07:16:31,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:31,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:31,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:31,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:31,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:16:31,628 INFO L87 Difference]: Start difference. First operand 16623 states and 23972 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2022-11-19 07:16:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:33,840 INFO L93 Difference]: Finished difference Result 25843 states and 38622 transitions. [2022-11-19 07:16:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:33,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 135 [2022-11-19 07:16:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:33,883 INFO L225 Difference]: With dead ends: 25843 [2022-11-19 07:16:33,883 INFO L226 Difference]: Without dead ends: 16681 [2022-11-19 07:16:33,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:16:33,899 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 118 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:33,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 507 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16681 states. [2022-11-19 07:16:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16681 to 16575. [2022-11-19 07:16:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16575 states, 13713 states have (on average 1.4045066725005468) internal successors, (19260), 13790 states have internal predecessors, (19260), 1729 states have call successors, (1729), 1113 states have call predecessors, (1729), 1131 states have return successors, (2663), 1673 states have call predecessors, (2663), 1728 states have call successors, (2663) [2022-11-19 07:16:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16575 states to 16575 states and 23652 transitions. [2022-11-19 07:16:36,470 INFO L78 Accepts]: Start accepts. Automaton has 16575 states and 23652 transitions. Word has length 135 [2022-11-19 07:16:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:36,470 INFO L495 AbstractCegarLoop]: Abstraction has 16575 states and 23652 transitions. [2022-11-19 07:16:36,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2022-11-19 07:16:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 16575 states and 23652 transitions. [2022-11-19 07:16:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-19 07:16:36,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:36,497 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:36,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:36,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 07:16:36,703 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:36,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1976477002, now seen corresponding path program 1 times [2022-11-19 07:16:36,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:36,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164288939] [2022-11-19 07:16:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:36,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-19 07:16:36,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:36,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164288939] [2022-11-19 07:16:36,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164288939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:36,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105530407] [2022-11-19 07:16:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:36,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:36,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:36,990 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:37,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:16:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:37,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:16:37,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:16:37,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:37,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105530407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:37,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:37,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:16:37,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476489034] [2022-11-19 07:16:37,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:37,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:37,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:16:37,232 INFO L87 Difference]: Start difference. First operand 16575 states and 23652 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2022-11-19 07:16:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:40,173 INFO L93 Difference]: Finished difference Result 38805 states and 56710 transitions. [2022-11-19 07:16:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:40,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 135 [2022-11-19 07:16:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:40,232 INFO L225 Difference]: With dead ends: 38805 [2022-11-19 07:16:40,232 INFO L226 Difference]: Without dead ends: 22946 [2022-11-19 07:16:40,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:16:40,266 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 65 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 427 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 [2022-11-19 07:16:40,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 427 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22946 states. [2022-11-19 07:16:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22946 to 19039. [2022-11-19 07:16:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19039 states, 15981 states have (on average 1.4377072773919028) internal successors, (22976), 16059 states have internal predecessors, (22976), 1827 states have call successors, (1827), 1211 states have call predecessors, (1827), 1229 states have return successors, (2761), 1770 states have call predecessors, (2761), 1826 states have call successors, (2761) [2022-11-19 07:16:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19039 states to 19039 states and 27564 transitions. [2022-11-19 07:16:42,674 INFO L78 Accepts]: Start accepts. Automaton has 19039 states and 27564 transitions. Word has length 135 [2022-11-19 07:16:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:42,675 INFO L495 AbstractCegarLoop]: Abstraction has 19039 states and 27564 transitions. [2022-11-19 07:16:42,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2022-11-19 07:16:42,675 INFO L276 IsEmpty]: Start isEmpty. Operand 19039 states and 27564 transitions. [2022-11-19 07:16:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 07:16:42,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:42,695 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 07:16:42,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:42,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:42,895 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:42,896 INFO L85 PathProgramCache]: Analyzing trace with hash -796812506, now seen corresponding path program 1 times [2022-11-19 07:16:42,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:42,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704677721] [2022-11-19 07:16:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:42,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 07:16:43,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:43,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704677721] [2022-11-19 07:16:43,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704677721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:43,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228627222] [2022-11-19 07:16:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:43,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:43,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:43,131 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:43,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:16:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:43,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:16:43,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:16:43,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:43,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228627222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:43,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:43,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-19 07:16:43,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940327227] [2022-11-19 07:16:43,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:43,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:16:43,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:16:43,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:16:43,361 INFO L87 Difference]: Start difference. First operand 19039 states and 27564 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2022-11-19 07:16:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:48,567 INFO L93 Difference]: Finished difference Result 55279 states and 80427 transitions. [2022-11-19 07:16:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:16:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 136 [2022-11-19 07:16:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:48,672 INFO L225 Difference]: With dead ends: 55279 [2022-11-19 07:16:48,672 INFO L226 Difference]: Without dead ends: 36956 [2022-11-19 07:16:48,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:16:48,706 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 234 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:48,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 785 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36956 states. [2022-11-19 07:16:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36956 to 36918. [2022-11-19 07:16:54,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36918 states, 31040 states have (on average 1.4201997422680412) internal successors, (44083), 31215 states have internal predecessors, (44083), 3501 states have call successors, (3501), 2325 states have call predecessors, (3501), 2375 states have return successors, (5707), 3379 states have call predecessors, (5707), 3500 states have call successors, (5707) [2022-11-19 07:16:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36918 states to 36918 states and 53291 transitions. [2022-11-19 07:16:54,523 INFO L78 Accepts]: Start accepts. Automaton has 36918 states and 53291 transitions. Word has length 136 [2022-11-19 07:16:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:54,523 INFO L495 AbstractCegarLoop]: Abstraction has 36918 states and 53291 transitions. [2022-11-19 07:16:54,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2022-11-19 07:16:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 36918 states and 53291 transitions. [2022-11-19 07:16:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 07:16:54,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:54,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 07:16:54,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:54,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:54,765 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash 270906921, now seen corresponding path program 1 times [2022-11-19 07:16:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:54,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244872440] [2022-11-19 07:16:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 07:16:54,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:54,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244872440] [2022-11-19 07:16:54,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244872440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:54,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577026866] [2022-11-19 07:16:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:54,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:54,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:54,987 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:55,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:16:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:16:55,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:16:55,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:55,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577026866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:55,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:55,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 07:16:55,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220144043] [2022-11-19 07:16:55,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:55,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:16:55,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:55,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:16:55,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:16:55,259 INFO L87 Difference]: Start difference. First operand 36918 states and 53291 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2022-11-19 07:17:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:03,752 INFO L93 Difference]: Finished difference Result 90030 states and 130107 transitions. [2022-11-19 07:17:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:17:03,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 136 [2022-11-19 07:17:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:03,906 INFO L225 Difference]: With dead ends: 90030 [2022-11-19 07:17:03,906 INFO L226 Difference]: Without dead ends: 53828 [2022-11-19 07:17:03,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:17:03,965 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 493 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:03,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 493 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:17:04,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53828 states. [2022-11-19 07:17:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53828 to 53826. [2022-11-19 07:17:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53826 states, 45196 states have (on average 1.4041729356580228) internal successors, (63463), 45451 states have internal predecessors, (63463), 5129 states have call successors, (5129), 3433 states have call predecessors, (5129), 3499 states have return successors, (8352), 4943 states have call predecessors, (8352), 5128 states have call successors, (8352) [2022-11-19 07:17:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53826 states to 53826 states and 76944 transitions. [2022-11-19 07:17:11,716 INFO L78 Accepts]: Start accepts. Automaton has 53826 states and 76944 transitions. Word has length 136 [2022-11-19 07:17:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:11,716 INFO L495 AbstractCegarLoop]: Abstraction has 53826 states and 76944 transitions. [2022-11-19 07:17:11,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2022-11-19 07:17:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 53826 states and 76944 transitions. [2022-11-19 07:17:11,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-19 07:17:11,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:11,773 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 07:17:11,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:11,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:11,974 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:11,974 INFO L85 PathProgramCache]: Analyzing trace with hash 690533567, now seen corresponding path program 1 times [2022-11-19 07:17:11,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:11,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604685657] [2022-11-19 07:17:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:11,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 07:17:12,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:12,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604685657] [2022-11-19 07:17:12,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604685657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:12,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199790303] [2022-11-19 07:17:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:12,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:12,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:12,088 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:12,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1f1d3c3-bf60-46d3-945e-8679e0717b30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:17:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:12,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:12,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:17:12,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:12,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199790303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:12,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:12,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:17:12,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048985358] [2022-11-19 07:17:12,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:12,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:12,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:17:12,332 INFO L87 Difference]: Start difference. First operand 53826 states and 76944 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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)