./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh --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 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc --- 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-2329fc7 [2022-12-14 12:46:44,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:46:44,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:46:44,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:46:44,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:46:44,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:46:44,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:46:44,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:46:44,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:46:44,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:46:44,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:46:44,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:46:44,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:46:44,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:46:44,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:46:44,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:46:44,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:46:44,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:46:44,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:46:44,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:46:44,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:46:44,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:46:44,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:46:44,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:46:44,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:46:44,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:46:44,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:46:44,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:46:44,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:46:44,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:46:44,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:46:44,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:46:44,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:46:44,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:46:44,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:46:44,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:46:44,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:46:44,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:46:44,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:46:44,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:46:44,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:46:44,402 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:46:44,423 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:46:44,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:46:44,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:46:44,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:46:44,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:46:44,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:46:44,424 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:46:44,424 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:46:44,425 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:46:44,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:46:44,425 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:46:44,425 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:46:44,425 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:46:44,425 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:46:44,426 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:46:44,426 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:46:44,426 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:46:44,426 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:46:44,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:46:44,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:46:44,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:46:44,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:46:44,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:46:44,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:46:44,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:46:44,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:46:44,428 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:46:44,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:46:44,428 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:46:44,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:46:44,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:46:44,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:46:44,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:46:44,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:46:44,429 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:46:44,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:46:44,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:46:44,430 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:46:44,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:46:44,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:46:44,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:46:44,430 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_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc [2022-12-14 12:46:44,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:46:44,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:46:44,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:46:44,636 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:46:44,636 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:46:44,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2022-12-14 12:46:47,215 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:46:47,390 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:46:47,390 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2022-12-14 12:46:47,401 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/data/ab2c9ae9c/923f1bbc08974dbe99d1a1c1b14e87f9/FLAG4c326f441 [2022-12-14 12:46:47,415 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/data/ab2c9ae9c/923f1bbc08974dbe99d1a1c1b14e87f9 [2022-12-14 12:46:47,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:46:47,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:46:47,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:46:47,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:46:47,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:46:47,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0a38ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47, skipping insertion in model container [2022-12-14 12:46:47,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:46:47,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:46:47,592 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2022-12-14 12:46:47,637 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2022-12-14 12:46:47,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:46:47,694 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:46:47,703 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2022-12-14 12:46:47,721 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2022-12-14 12:46:47,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:46:47,766 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:46:47,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47 WrapperNode [2022-12-14 12:46:47,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:46:47,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:46:47,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:46:47,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:46:47,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,817 INFO L138 Inliner]: procedures = 61, calls = 69, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 576 [2022-12-14 12:46:47,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:46:47,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:46:47,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:46:47,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:46:47,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,851 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:46:47,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:46:47,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:46:47,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:46:47,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (1/1) ... [2022-12-14 12:46:47,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:46:47,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:47,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:46:47,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:46:47,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:46:47,917 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 12:46:47,917 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 12:46:47,917 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 12:46:47,917 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 12:46:47,917 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 12:46:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 12:46:47,918 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 12:46:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 12:46:47,918 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 12:46:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 12:46:47,918 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 12:46:47,918 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 12:46:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 12:46:47,919 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 12:46:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 12:46:47,919 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 12:46:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 12:46:47,919 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 12:46:47,919 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 12:46:47,920 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 12:46:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 12:46:47,920 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 12:46:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:46:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 12:46:47,920 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 12:46:47,920 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 12:46:47,921 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 12:46:47,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:46:47,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:46:47,921 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 12:46:47,921 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 12:46:48,005 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:46:48,007 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:46:48,482 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:46:48,700 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:46:48,701 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 12:46:48,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:46:48 BoogieIcfgContainer [2022-12-14 12:46:48,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:46:48,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:46:48,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:46:48,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:46:48,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:46:47" (1/3) ... [2022-12-14 12:46:48,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce8da6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:46:48, skipping insertion in model container [2022-12-14 12:46:48,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:47" (2/3) ... [2022-12-14 12:46:48,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce8da6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:46:48, skipping insertion in model container [2022-12-14 12:46:48,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:46:48" (3/3) ... [2022-12-14 12:46:48,711 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2022-12-14 12:46:48,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:46:48,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 12:46:48,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:46:48,786 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;@4b2d947f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:46:48,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 12:46:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 123 states have (on average 1.5040650406504066) internal successors, (185), 129 states have internal predecessors, (185), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-12-14 12:46:48,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:46:48,803 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:48,804 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] [2022-12-14 12:46:48,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:48,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1741966448, now seen corresponding path program 1 times [2022-12-14 12:46:48,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:48,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908968814] [2022-12-14 12:46:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:48,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:46:49,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:49,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908968814] [2022-12-14 12:46:49,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908968814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:49,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:49,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:46:49,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236227330] [2022-12-14 12:46:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:49,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:46:49,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:49,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:46:49,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:46:49,141 INFO L87 Difference]: Start difference. First operand has 172 states, 123 states have (on average 1.5040650406504066) internal successors, (185), 129 states have internal predecessors, (185), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:46:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:49,411 INFO L93 Difference]: Finished difference Result 395 states and 569 transitions. [2022-12-14 12:46:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:46:49,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-12-14 12:46:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:49,422 INFO L225 Difference]: With dead ends: 395 [2022-12-14 12:46:49,422 INFO L226 Difference]: Without dead ends: 227 [2022-12-14 12:46:49,425 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 [2022-12-14 12:46:49,428 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 297 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:49,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 424 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:46:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-12-14 12:46:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2022-12-14 12:46:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 158 states have (on average 1.379746835443038) internal successors, (218), 162 states have internal predecessors, (218), 40 states have call successors, (40), 21 states have call predecessors, (40), 20 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 12:46:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 296 transitions. [2022-12-14 12:46:49,482 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 296 transitions. Word has length 45 [2022-12-14 12:46:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:49,483 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 296 transitions. [2022-12-14 12:46:49,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:46:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 296 transitions. [2022-12-14 12:46:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:46:49,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:49,486 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] [2022-12-14 12:46:49,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:46:49,487 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash -822991825, now seen corresponding path program 1 times [2022-12-14 12:46:49,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:49,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182090728] [2022-12-14 12:46:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:49,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:46:49,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:49,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182090728] [2022-12-14 12:46:49,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182090728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:49,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:49,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:46:49,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581012313] [2022-12-14 12:46:49,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:49,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:46:49,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:49,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:46:49,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:46:49,691 INFO L87 Difference]: Start difference. First operand 220 states and 296 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 12:46:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:50,180 INFO L93 Difference]: Finished difference Result 401 states and 517 transitions. [2022-12-14 12:46:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:46:50,180 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 [2022-12-14 12:46:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:50,184 INFO L225 Difference]: With dead ends: 401 [2022-12-14 12:46:50,184 INFO L226 Difference]: Without dead ends: 285 [2022-12-14 12:46:50,185 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 [2022-12-14 12:46:50,186 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 357 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:50,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 696 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:46:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-12-14 12:46:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 272. [2022-12-14 12:46:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 195 states have (on average 1.358974358974359) internal successors, (265), 199 states have internal predecessors, (265), 48 states have call successors, (48), 28 states have call predecessors, (48), 27 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-12-14 12:46:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 359 transitions. [2022-12-14 12:46:50,217 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 359 transitions. Word has length 45 [2022-12-14 12:46:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:50,218 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 359 transitions. [2022-12-14 12:46:50,218 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) [2022-12-14 12:46:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 359 transitions. [2022-12-14 12:46:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 12:46:50,220 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:50,220 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] [2022-12-14 12:46:50,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:46:50,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1712954859, now seen corresponding path program 1 times [2022-12-14 12:46:50,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:50,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716045976] [2022-12-14 12:46:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:50,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:46:50,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:50,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716045976] [2022-12-14 12:46:50,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716045976] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:50,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:50,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:46:50,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007580087] [2022-12-14 12:46:50,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:50,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:46:50,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:50,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:46:50,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:46:50,307 INFO L87 Difference]: Start difference. First operand 272 states and 359 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2022-12-14 12:46:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:50,738 INFO L93 Difference]: Finished difference Result 710 states and 1042 transitions. [2022-12-14 12:46:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:46:50,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 43 [2022-12-14 12:46:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:50,743 INFO L225 Difference]: With dead ends: 710 [2022-12-14 12:46:50,743 INFO L226 Difference]: Without dead ends: 617 [2022-12-14 12:46:50,744 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 [2022-12-14 12:46:50,746 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 703 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:50,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 727 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:46:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-12-14 12:46:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 606. [2022-12-14 12:46:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 452 states have (on average 1.404867256637168) internal successors, (635), 459 states have internal predecessors, (635), 101 states have call successors, (101), 52 states have call predecessors, (101), 51 states have return successors, (129), 96 states have call predecessors, (129), 99 states have call successors, (129) [2022-12-14 12:46:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 865 transitions. [2022-12-14 12:46:50,802 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 865 transitions. Word has length 43 [2022-12-14 12:46:50,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:50,802 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 865 transitions. [2022-12-14 12:46:50,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2022-12-14 12:46:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 865 transitions. [2022-12-14 12:46:50,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 12:46:50,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:50,804 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] [2022-12-14 12:46:50,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:46:50,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:50,805 INFO L85 PathProgramCache]: Analyzing trace with hash 528650829, now seen corresponding path program 1 times [2022-12-14 12:46:50,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:50,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756714586] [2022-12-14 12:46:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:50,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:46:50,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:50,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756714586] [2022-12-14 12:46:50,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756714586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:50,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:50,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:46:50,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532690357] [2022-12-14 12:46:50,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:50,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:46:50,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:50,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:46:50,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:46:50,847 INFO L87 Difference]: Start difference. First operand 606 states and 865 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) [2022-12-14 12:46:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:50,947 INFO L93 Difference]: Finished difference Result 934 states and 1271 transitions. [2022-12-14 12:46:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:46:50,947 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 [2022-12-14 12:46:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:50,953 INFO L225 Difference]: With dead ends: 934 [2022-12-14 12:46:50,953 INFO L226 Difference]: Without dead ends: 765 [2022-12-14 12:46:50,955 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 [2022-12-14 12:46:50,956 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 208 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:50,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 263 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:46:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-12-14 12:46:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 746. [2022-12-14 12:46:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 547 states have (on average 1.3619744058500913) internal successors, (745), 554 states have internal predecessors, (745), 125 states have call successors, (125), 73 states have call predecessors, (125), 72 states have return successors, (153), 120 states have call predecessors, (153), 123 states have call successors, (153) [2022-12-14 12:46:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1023 transitions. [2022-12-14 12:46:51,021 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1023 transitions. Word has length 46 [2022-12-14 12:46:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:51,021 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1023 transitions. [2022-12-14 12:46:51,021 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) [2022-12-14 12:46:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1023 transitions. [2022-12-14 12:46:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 12:46:51,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:51,024 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] [2022-12-14 12:46:51,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:46:51,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:51,025 INFO L85 PathProgramCache]: Analyzing trace with hash -676982949, now seen corresponding path program 1 times [2022-12-14 12:46:51,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:51,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133811508] [2022-12-14 12:46:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:51,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:46:51,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:51,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133811508] [2022-12-14 12:46:51,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133811508] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:51,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:51,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:46:51,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374604315] [2022-12-14 12:46:51,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:51,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:46:51,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:51,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:46:51,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:46:51,063 INFO L87 Difference]: Start difference. First operand 746 states and 1023 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) [2022-12-14 12:46:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:51,176 INFO L93 Difference]: Finished difference Result 1116 states and 1468 transitions. [2022-12-14 12:46:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:46:51,176 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 [2022-12-14 12:46:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:51,181 INFO L225 Difference]: With dead ends: 1116 [2022-12-14 12:46:51,181 INFO L226 Difference]: Without dead ends: 853 [2022-12-14 12:46:51,182 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 [2022-12-14 12:46:51,183 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 67 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:51,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 379 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-12-14 12:46:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 847. [2022-12-14 12:46:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 618 states have (on average 1.3478964401294498) internal successors, (833), 625 states have internal predecessors, (833), 141 states have call successors, (141), 87 states have call predecessors, (141), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-12-14 12:46:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1143 transitions. [2022-12-14 12:46:51,229 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1143 transitions. Word has length 47 [2022-12-14 12:46:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:51,230 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1143 transitions. [2022-12-14 12:46:51,230 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) [2022-12-14 12:46:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1143 transitions. [2022-12-14 12:46:51,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:46:51,231 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:51,231 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] [2022-12-14 12:46:51,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:46:51,231 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:51,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:51,231 INFO L85 PathProgramCache]: Analyzing trace with hash 118694103, now seen corresponding path program 1 times [2022-12-14 12:46:51,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:51,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585335005] [2022-12-14 12:46:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:51,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:46:51,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:51,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585335005] [2022-12-14 12:46:51,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585335005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:51,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:51,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:46:51,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679129714] [2022-12-14 12:46:51,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:51,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:46:51,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:51,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:46:51,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:46:51,281 INFO L87 Difference]: Start difference. First operand 847 states and 1143 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) [2022-12-14 12:46:51,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:51,481 INFO L93 Difference]: Finished difference Result 954 states and 1269 transitions. [2022-12-14 12:46:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:46:51,482 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 [2022-12-14 12:46:51,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:51,489 INFO L225 Difference]: With dead ends: 954 [2022-12-14 12:46:51,489 INFO L226 Difference]: Without dead ends: 951 [2022-12-14 12:46:51,490 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 [2022-12-14 12:46:51,491 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 376 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:51,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 246 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-12-14 12:46:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 846. [2022-12-14 12:46:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 618 states have (on average 1.343042071197411) internal successors, (830), 624 states have internal predecessors, (830), 140 states have call successors, (140), 87 states have call predecessors, (140), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-12-14 12:46:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1139 transitions. [2022-12-14 12:46:51,559 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1139 transitions. Word has length 54 [2022-12-14 12:46:51,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:51,559 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1139 transitions. [2022-12-14 12:46:51,559 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) [2022-12-14 12:46:51,560 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1139 transitions. [2022-12-14 12:46:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 12:46:51,560 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:51,560 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] [2022-12-14 12:46:51,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:46:51,561 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:51,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:51,561 INFO L85 PathProgramCache]: Analyzing trace with hash -616296892, now seen corresponding path program 1 times [2022-12-14 12:46:51,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:51,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952552726] [2022-12-14 12:46:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:51,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:46:51,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952552726] [2022-12-14 12:46:51,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952552726] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:46:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495475288] [2022-12-14 12:46:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:51,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:51,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:51,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:51,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:46:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:51,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:46:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:46:51,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:46:52,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495475288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:52,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [696072516] [2022-12-14 12:46:52,150 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 12:46:52,150 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:46:52,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:46:52,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:46:52,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:46:54,648 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 125 for LOIs [2022-12-14 12:46:54,661 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 121 for LOIs [2022-12-14 12:46:54,672 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 129 for LOIs [2022-12-14 12:46:54,915 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2022-12-14 12:46:54,955 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 125 for LOIs [2022-12-14 12:46:54,999 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 125 for LOIs [2022-12-14 12:46:55,018 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 132 for LOIs [2022-12-14 12:46:55,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:47:04,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [696072516] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:04,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:47:04,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-12-14 12:47:04,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575717588] [2022-12-14 12:47:04,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:04,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 12:47:04,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:04,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 12:47:04,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:47:04,611 INFO L87 Difference]: Start difference. First operand 846 states and 1139 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 12:47:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:19,654 INFO L93 Difference]: Finished difference Result 1303 states and 1672 transitions. [2022-12-14 12:47:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 12:47:19,655 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-12-14 12:47:19,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:19,659 INFO L225 Difference]: With dead ends: 1303 [2022-12-14 12:47:19,660 INFO L226 Difference]: Without dead ends: 895 [2022-12-14 12:47:19,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 12:47:19,663 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 164 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 3895 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 4046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 3895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:19,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 1946 Invalid, 4046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 3895 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 12:47:19,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-12-14 12:47:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 880. [2022-12-14 12:47:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 644 states have (on average 1.3322981366459627) internal successors, (858), 650 states have internal predecessors, (858), 142 states have call successors, (142), 93 states have call predecessors, (142), 92 states have return successors, (171), 138 states have call predecessors, (171), 141 states have call successors, (171) [2022-12-14 12:47:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1171 transitions. [2022-12-14 12:47:19,771 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1171 transitions. Word has length 55 [2022-12-14 12:47:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:19,772 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1171 transitions. [2022-12-14 12:47:19,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 12:47:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1171 transitions. [2022-12-14 12:47:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 12:47:19,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:19,774 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] [2022-12-14 12:47:19,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:47:19,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 12:47:19,974 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1347547564, now seen corresponding path program 1 times [2022-12-14 12:47:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:19,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663895375] [2022-12-14 12:47:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:19,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:47:20,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:20,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663895375] [2022-12-14 12:47:20,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663895375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:20,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:47:20,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:47:20,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594538104] [2022-12-14 12:47:20,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:20,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:20,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:20,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:47:20,032 INFO L87 Difference]: Start difference. First operand 880 states and 1171 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) [2022-12-14 12:47:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:20,160 INFO L93 Difference]: Finished difference Result 1327 states and 1707 transitions. [2022-12-14 12:47:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:20,161 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 [2022-12-14 12:47:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:20,164 INFO L225 Difference]: With dead ends: 1327 [2022-12-14 12:47:20,164 INFO L226 Difference]: Without dead ends: 1061 [2022-12-14 12:47:20,165 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 [2022-12-14 12:47:20,166 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 43 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:20,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 422 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2022-12-14 12:47:20,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 932. [2022-12-14 12:47:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 686 states have (on average 1.3279883381924198) internal successors, (911), 692 states have internal predecessors, (911), 147 states have call successors, (147), 98 states have call predecessors, (147), 97 states have return successors, (176), 143 states have call predecessors, (176), 146 states have call successors, (176) [2022-12-14 12:47:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1234 transitions. [2022-12-14 12:47:20,239 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1234 transitions. Word has length 61 [2022-12-14 12:47:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:20,239 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1234 transitions. [2022-12-14 12:47:20,239 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) [2022-12-14 12:47:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1234 transitions. [2022-12-14 12:47:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 12:47:20,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:20,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:20,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 12:47:20,241 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:20,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1516290496, now seen corresponding path program 1 times [2022-12-14 12:47:20,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:20,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720627149] [2022-12-14 12:47:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:20,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:47:20,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:20,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720627149] [2022-12-14 12:47:20,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720627149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:20,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:47:20,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:47:20,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606004103] [2022-12-14 12:47:20,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:20,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:47:20,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:20,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:47:20,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:47:20,345 INFO L87 Difference]: Start difference. First operand 932 states and 1234 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:47:20,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:20,744 INFO L93 Difference]: Finished difference Result 1606 states and 2021 transitions. [2022-12-14 12:47:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:47:20,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-12-14 12:47:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:20,748 INFO L225 Difference]: With dead ends: 1606 [2022-12-14 12:47:20,748 INFO L226 Difference]: Without dead ends: 1193 [2022-12-14 12:47:20,749 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 [2022-12-14 12:47:20,749 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 340 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:20,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 569 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:47:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-12-14 12:47:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1158. [2022-12-14 12:47:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 837 states have (on average 1.2951015531660692) internal successors, (1084), 843 states have internal predecessors, (1084), 187 states have call successors, (187), 133 states have call predecessors, (187), 132 states have return successors, (216), 183 states have call predecessors, (216), 186 states have call successors, (216) [2022-12-14 12:47:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1487 transitions. [2022-12-14 12:47:20,840 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1487 transitions. Word has length 63 [2022-12-14 12:47:20,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:20,841 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 1487 transitions. [2022-12-14 12:47:20,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:47:20,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1487 transitions. [2022-12-14 12:47:20,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 12:47:20,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:20,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:20,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:47:20,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:20,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:20,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2129077125, now seen corresponding path program 1 times [2022-12-14 12:47:20,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:20,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616586109] [2022-12-14 12:47:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:20,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:47:20,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:20,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616586109] [2022-12-14 12:47:20,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616586109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:20,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693008483] [2022-12-14 12:47:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:20,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:20,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:20,929 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:20,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:47:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:21,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:47:21,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:47:21,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:47:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:47:21,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693008483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:47:21,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1048574735] [2022-12-14 12:47:21,247 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 12:47:21,247 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:47:21,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:47:21,247 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:47:21,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:47:25,638 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 125 for LOIs [2022-12-14 12:47:25,651 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 163 for LOIs [2022-12-14 12:47:25,684 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 164 for LOIs [2022-12-14 12:47:25,725 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 129 for LOIs [2022-12-14 12:47:25,946 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2022-12-14 12:47:25,982 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 125 for LOIs [2022-12-14 12:47:26,013 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 125 for LOIs [2022-12-14 12:47:26,026 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 132 for LOIs [2022-12-14 12:47:26,039 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:47:37,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23435#(and (= ~q_req_up~0 1) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~c_dr_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 12:47:37,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:47:37,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:47:37,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 12:47:37,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903875556] [2022-12-14 12:47:37,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:47:37,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:47:37,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:37,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:47:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 12:47:37,954 INFO L87 Difference]: Start difference. First operand 1158 states and 1487 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-12-14 12:47:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:38,508 INFO L93 Difference]: Finished difference Result 2664 states and 3250 transitions. [2022-12-14 12:47:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:47:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-12-14 12:47:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:38,514 INFO L225 Difference]: With dead ends: 2664 [2022-12-14 12:47:38,514 INFO L226 Difference]: Without dead ends: 2661 [2022-12-14 12:47:38,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 12:47:38,515 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 480 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:38,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 796 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:47:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2022-12-14 12:47:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 1881. [2022-12-14 12:47:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1338 states have (on average 1.2675635276532138) internal successors, (1696), 1344 states have internal predecessors, (1696), 305 states have call successors, (305), 237 states have call predecessors, (305), 236 states have return successors, (334), 301 states have call predecessors, (334), 304 states have call successors, (334) [2022-12-14 12:47:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2335 transitions. [2022-12-14 12:47:38,675 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2335 transitions. Word has length 64 [2022-12-14 12:47:38,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:38,676 INFO L495 AbstractCegarLoop]: Abstraction has 1881 states and 2335 transitions. [2022-12-14 12:47:38,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-12-14 12:47:38,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2335 transitions. [2022-12-14 12:47:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 12:47:38,677 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:38,677 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:38,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:47:38,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 12:47:38,878 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:38,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:38,878 INFO L85 PathProgramCache]: Analyzing trace with hash -241383032, now seen corresponding path program 2 times [2022-12-14 12:47:38,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:38,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057330272] [2022-12-14 12:47:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:38,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:47:38,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057330272] [2022-12-14 12:47:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057330272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:38,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:47:38,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:47:38,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069744160] [2022-12-14 12:47:38,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:38,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:38,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:47:38,914 INFO L87 Difference]: Start difference. First operand 1881 states and 2335 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:47:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:39,123 INFO L93 Difference]: Finished difference Result 2637 states and 3221 transitions. [2022-12-14 12:47:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:39,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-12-14 12:47:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:39,129 INFO L225 Difference]: With dead ends: 2637 [2022-12-14 12:47:39,129 INFO L226 Difference]: Without dead ends: 1471 [2022-12-14 12:47:39,131 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 [2022-12-14 12:47:39,131 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 206 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:39,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 304 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:47:39,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2022-12-14 12:47:39,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1464. [2022-12-14 12:47:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1049 states have (on average 1.2659675881792183) internal successors, (1328), 1055 states have internal predecessors, (1328), 237 states have call successors, (237), 177 states have call predecessors, (237), 176 states have return successors, (266), 233 states have call predecessors, (266), 236 states have call successors, (266) [2022-12-14 12:47:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1831 transitions. [2022-12-14 12:47:39,255 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1831 transitions. Word has length 67 [2022-12-14 12:47:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:39,255 INFO L495 AbstractCegarLoop]: Abstraction has 1464 states and 1831 transitions. [2022-12-14 12:47:39,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:47:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1831 transitions. [2022-12-14 12:47:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 12:47:39,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:39,257 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] [2022-12-14 12:47:39,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 12:47:39,257 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash -594708440, now seen corresponding path program 1 times [2022-12-14 12:47:39,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:39,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402950483] [2022-12-14 12:47:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:47:39,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:39,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402950483] [2022-12-14 12:47:39,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402950483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:39,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:47:39,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:47:39,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5572111] [2022-12-14 12:47:39,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:39,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:39,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:39,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:39,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:47:39,292 INFO L87 Difference]: Start difference. First operand 1464 states and 1831 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) [2022-12-14 12:47:39,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:39,519 INFO L93 Difference]: Finished difference Result 2436 states and 2959 transitions. [2022-12-14 12:47:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:39,519 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 [2022-12-14 12:47:39,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:39,523 INFO L225 Difference]: With dead ends: 2436 [2022-12-14 12:47:39,523 INFO L226 Difference]: Without dead ends: 1640 [2022-12-14 12:47:39,524 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 [2022-12-14 12:47:39,525 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 38 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:39,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 413 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2022-12-14 12:47:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1511. [2022-12-14 12:47:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1088 states have (on average 1.2665441176470589) internal successors, (1378), 1094 states have internal predecessors, (1378), 241 states have call successors, (241), 181 states have call predecessors, (241), 180 states have return successors, (270), 237 states have call predecessors, (270), 240 states have call successors, (270) [2022-12-14 12:47:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1889 transitions. [2022-12-14 12:47:39,649 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1889 transitions. Word has length 71 [2022-12-14 12:47:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:39,649 INFO L495 AbstractCegarLoop]: Abstraction has 1511 states and 1889 transitions. [2022-12-14 12:47:39,649 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) [2022-12-14 12:47:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1889 transitions. [2022-12-14 12:47:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 12:47:39,650 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:39,650 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:39,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 12:47:39,651 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1038128017, now seen corresponding path program 1 times [2022-12-14 12:47:39,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:39,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421174433] [2022-12-14 12:47:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:39,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:47:39,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:39,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421174433] [2022-12-14 12:47:39,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421174433] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:39,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543113006] [2022-12-14 12:47:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:39,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:39,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:39,704 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:39,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:47:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:39,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:47:39,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:47:39,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:47:39,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543113006] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:39,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:47:39,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:47:39,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048172308] [2022-12-14 12:47:39,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:39,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:39,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:39,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:39,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:39,833 INFO L87 Difference]: Start difference. First operand 1511 states and 1889 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2022-12-14 12:47:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:40,079 INFO L93 Difference]: Finished difference Result 2349 states and 3197 transitions. [2022-12-14 12:47:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 80 [2022-12-14 12:47:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:40,091 INFO L225 Difference]: With dead ends: 2349 [2022-12-14 12:47:40,091 INFO L226 Difference]: Without dead ends: 1922 [2022-12-14 12:47:40,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:40,094 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 199 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:40,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 308 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2022-12-14 12:47:40,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1915. [2022-12-14 12:47:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1400 states have (on average 1.3007142857142857) internal successors, (1821), 1409 states have internal predecessors, (1821), 303 states have call successors, (303), 211 states have call predecessors, (303), 210 states have return successors, (358), 296 states have call predecessors, (358), 302 states have call successors, (358) [2022-12-14 12:47:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2482 transitions. [2022-12-14 12:47:40,301 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2482 transitions. Word has length 80 [2022-12-14 12:47:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:40,302 INFO L495 AbstractCegarLoop]: Abstraction has 1915 states and 2482 transitions. [2022-12-14 12:47:40,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2022-12-14 12:47:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2482 transitions. [2022-12-14 12:47:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 12:47:40,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:40,303 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:40,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:47:40,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:40,504 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash -311999631, now seen corresponding path program 1 times [2022-12-14 12:47:40,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:40,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101571430] [2022-12-14 12:47:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:40,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:47:40,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:40,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101571430] [2022-12-14 12:47:40,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101571430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:40,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433210264] [2022-12-14 12:47:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:40,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:40,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:40,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:40,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:47:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:40,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:47:40,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 12:47:40,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:47:40,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433210264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:40,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:47:40,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:47:40,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549967043] [2022-12-14 12:47:40,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:40,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:40,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:40,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:40,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:40,789 INFO L87 Difference]: Start difference. First operand 1915 states and 2482 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-12-14 12:47:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:41,063 INFO L93 Difference]: Finished difference Result 3546 states and 4996 transitions. [2022-12-14 12:47:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:41,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 80 [2022-12-14 12:47:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:41,074 INFO L225 Difference]: With dead ends: 3546 [2022-12-14 12:47:41,075 INFO L226 Difference]: Without dead ends: 2715 [2022-12-14 12:47:41,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:41,079 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 202 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:41,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 308 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2022-12-14 12:47:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2703. [2022-12-14 12:47:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2009 states have (on average 1.3325037332005973) internal successors, (2677), 2024 states have internal predecessors, (2677), 422 states have call successors, (422), 271 states have call predecessors, (422), 270 states have return successors, (525), 409 states have call predecessors, (525), 421 states have call successors, (525) [2022-12-14 12:47:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 3624 transitions. [2022-12-14 12:47:41,292 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 3624 transitions. Word has length 80 [2022-12-14 12:47:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:41,293 INFO L495 AbstractCegarLoop]: Abstraction has 2703 states and 3624 transitions. [2022-12-14 12:47:41,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-12-14 12:47:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 3624 transitions. [2022-12-14 12:47:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 12:47:41,295 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:41,295 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:41,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:47:41,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 12:47:41,496 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:41,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:41,496 INFO L85 PathProgramCache]: Analyzing trace with hash 403965841, now seen corresponding path program 1 times [2022-12-14 12:47:41,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:41,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718414214] [2022-12-14 12:47:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:41,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 12:47:41,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:41,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718414214] [2022-12-14 12:47:41,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718414214] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:41,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:47:41,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:47:41,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787249896] [2022-12-14 12:47:41,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:41,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:41,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:47:41,570 INFO L87 Difference]: Start difference. First operand 2703 states and 3624 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-12-14 12:47:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:41,920 INFO L93 Difference]: Finished difference Result 4377 states and 6189 transitions. [2022-12-14 12:47:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 80 [2022-12-14 12:47:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:41,933 INFO L225 Difference]: With dead ends: 4377 [2022-12-14 12:47:41,933 INFO L226 Difference]: Without dead ends: 3079 [2022-12-14 12:47:41,939 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 [2022-12-14 12:47:41,939 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 56 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:41,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 443 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2022-12-14 12:47:42,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 2907. [2022-12-14 12:47:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2197 states have (on average 1.3623122439690487) internal successors, (2993), 2212 states have internal predecessors, (2993), 430 states have call successors, (430), 279 states have call predecessors, (430), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2022-12-14 12:47:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 3956 transitions. [2022-12-14 12:47:42,182 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 3956 transitions. Word has length 80 [2022-12-14 12:47:42,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:42,182 INFO L495 AbstractCegarLoop]: Abstraction has 2907 states and 3956 transitions. [2022-12-14 12:47:42,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-12-14 12:47:42,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 3956 transitions. [2022-12-14 12:47:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 12:47:42,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:42,187 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] [2022-12-14 12:47:42,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 12:47:42,187 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1137886462, now seen corresponding path program 1 times [2022-12-14 12:47:42,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:42,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252859326] [2022-12-14 12:47:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:42,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:47:42,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:42,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252859326] [2022-12-14 12:47:42,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252859326] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:42,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252814255] [2022-12-14 12:47:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:42,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:42,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:42,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:42,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:47:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:47:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:47:42,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:47:42,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252814255] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:42,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:47:42,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-12-14 12:47:42,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292045526] [2022-12-14 12:47:42,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:42,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:42,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:42,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:42,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:47:42,561 INFO L87 Difference]: Start difference. First operand 2907 states and 3956 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) [2022-12-14 12:47:42,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:42,861 INFO L93 Difference]: Finished difference Result 3732 states and 4944 transitions. [2022-12-14 12:47:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:42,861 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 [2022-12-14 12:47:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:42,870 INFO L225 Difference]: With dead ends: 3732 [2022-12-14 12:47:42,870 INFO L226 Difference]: Without dead ends: 2936 [2022-12-14 12:47:42,872 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 [2022-12-14 12:47:42,873 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 46 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:42,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 425 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2022-12-14 12:47:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2903. [2022-12-14 12:47:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2193 states have (on average 1.3483812129502963) internal successors, (2957), 2208 states have internal predecessors, (2957), 430 states have call successors, (430), 279 states have call predecessors, (430), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2022-12-14 12:47:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 3920 transitions. [2022-12-14 12:47:43,084 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 3920 transitions. Word has length 102 [2022-12-14 12:47:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:43,084 INFO L495 AbstractCegarLoop]: Abstraction has 2903 states and 3920 transitions. [2022-12-14 12:47:43,084 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) [2022-12-14 12:47:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 3920 transitions. [2022-12-14 12:47:43,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 12:47:43,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:43,087 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] [2022-12-14 12:47:43,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:47:43,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 12:47:43,288 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:43,288 INFO L85 PathProgramCache]: Analyzing trace with hash 438671297, now seen corresponding path program 1 times [2022-12-14 12:47:43,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:43,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321594682] [2022-12-14 12:47:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:43,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:47:43,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:43,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321594682] [2022-12-14 12:47:43,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321594682] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:43,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927510201] [2022-12-14 12:47:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:43,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:43,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:43,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:43,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:47:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:43,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 12:47:43,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:47:43,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:47:43,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927510201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:43,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:47:43,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-12-14 12:47:43,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496901987] [2022-12-14 12:47:43,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:43,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:47:43,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:43,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:47:43,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:47:43,615 INFO L87 Difference]: Start difference. First operand 2903 states and 3920 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) [2022-12-14 12:47:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:43,959 INFO L93 Difference]: Finished difference Result 3765 states and 4924 transitions. [2022-12-14 12:47:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:47:43,960 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 [2022-12-14 12:47:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:43,977 INFO L225 Difference]: With dead ends: 3765 [2022-12-14 12:47:43,977 INFO L226 Difference]: Without dead ends: 2718 [2022-12-14 12:47:43,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:47:43,981 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 199 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:43,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 881 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2022-12-14 12:47:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 2533. [2022-12-14 12:47:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2533 states, 1955 states have (on average 1.373913043478261) internal successors, (2686), 1970 states have internal predecessors, (2686), 359 states have call successors, (359), 218 states have call predecessors, (359), 217 states have return successors, (462), 346 states have call predecessors, (462), 358 states have call successors, (462) [2022-12-14 12:47:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2533 states to 2533 states and 3507 transitions. [2022-12-14 12:47:44,204 INFO L78 Accepts]: Start accepts. Automaton has 2533 states and 3507 transitions. Word has length 102 [2022-12-14 12:47:44,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:44,204 INFO L495 AbstractCegarLoop]: Abstraction has 2533 states and 3507 transitions. [2022-12-14 12:47:44,204 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) [2022-12-14 12:47:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2533 states and 3507 transitions. [2022-12-14 12:47:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 12:47:44,208 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:44,208 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] [2022-12-14 12:47:44,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:47:44,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 12:47:44,409 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:44,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2083645505, now seen corresponding path program 1 times [2022-12-14 12:47:44,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:44,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089984746] [2022-12-14 12:47:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:44,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 12:47:44,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:44,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089984746] [2022-12-14 12:47:44,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089984746] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:44,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830063536] [2022-12-14 12:47:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:44,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:44,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:44,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:47:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:44,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 12:47:44,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:47:44,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:47:44,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830063536] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:44,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:47:44,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 12:47:44,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9134817] [2022-12-14 12:47:44,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:44,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:47:44,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:47:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:47:44,700 INFO L87 Difference]: Start difference. First operand 2533 states and 3507 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) [2022-12-14 12:47:45,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:45,118 INFO L93 Difference]: Finished difference Result 3082 states and 4132 transitions. [2022-12-14 12:47:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:47:45,118 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 [2022-12-14 12:47:45,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:45,124 INFO L225 Difference]: With dead ends: 3082 [2022-12-14 12:47:45,124 INFO L226 Difference]: Without dead ends: 2489 [2022-12-14 12:47:45,126 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 [2022-12-14 12:47:45,126 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 63 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:45,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1091 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:45,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2022-12-14 12:47:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2397. [2022-12-14 12:47:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 1855 states have (on average 1.3849056603773584) internal successors, (2569), 1870 states have internal predecessors, (2569), 340 states have call successors, (340), 201 states have call predecessors, (340), 200 states have return successors, (443), 327 states have call predecessors, (443), 339 states have call successors, (443) [2022-12-14 12:47:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3352 transitions. [2022-12-14 12:47:45,287 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3352 transitions. Word has length 112 [2022-12-14 12:47:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:45,287 INFO L495 AbstractCegarLoop]: Abstraction has 2397 states and 3352 transitions. [2022-12-14 12:47:45,287 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) [2022-12-14 12:47:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3352 transitions. [2022-12-14 12:47:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 12:47:45,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:45,290 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:45,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:47:45,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 12:47:45,492 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:45,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash -245058785, now seen corresponding path program 1 times [2022-12-14 12:47:45,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:45,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088232999] [2022-12-14 12:47:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:45,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 12:47:45,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:45,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088232999] [2022-12-14 12:47:45,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088232999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:45,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:47:45,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:47:45,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255919943] [2022-12-14 12:47:45,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:45,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:45,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:47:45,562 INFO L87 Difference]: Start difference. First operand 2397 states and 3352 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (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) [2022-12-14 12:47:45,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:45,928 INFO L93 Difference]: Finished difference Result 5954 states and 8789 transitions. [2022-12-14 12:47:45,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:45,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (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 106 [2022-12-14 12:47:45,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:45,944 INFO L225 Difference]: With dead ends: 5954 [2022-12-14 12:47:45,945 INFO L226 Difference]: Without dead ends: 4131 [2022-12-14 12:47:45,950 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 [2022-12-14 12:47:45,950 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 197 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:45,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 311 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2022-12-14 12:47:46,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 4101. [2022-12-14 12:47:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 3195 states have (on average 1.3974960876369327) internal successors, (4465), 3222 states have internal predecessors, (4465), 576 states have call successors, (576), 329 states have call predecessors, (576), 328 states have return successors, (767), 551 states have call predecessors, (767), 575 states have call successors, (767) [2022-12-14 12:47:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 5808 transitions. [2022-12-14 12:47:46,299 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 5808 transitions. Word has length 106 [2022-12-14 12:47:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:46,299 INFO L495 AbstractCegarLoop]: Abstraction has 4101 states and 5808 transitions. [2022-12-14 12:47:46,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (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) [2022-12-14 12:47:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 5808 transitions. [2022-12-14 12:47:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 12:47:46,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:46,303 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] [2022-12-14 12:47:46,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 12:47:46,303 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1823136367, now seen corresponding path program 1 times [2022-12-14 12:47:46,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:46,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897324280] [2022-12-14 12:47:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:46,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 12:47:46,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:46,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897324280] [2022-12-14 12:47:46,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897324280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:46,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766019921] [2022-12-14 12:47:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:46,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:46,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:46,393 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:46,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:47:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:46,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:47:46,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:47:46,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:47:46,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766019921] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:46,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:47:46,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-12-14 12:47:46,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702885115] [2022-12-14 12:47:46,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:46,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:47:46,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:47:46,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:47:46,538 INFO L87 Difference]: Start difference. First operand 4101 states and 5808 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) [2022-12-14 12:47:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:47,007 INFO L93 Difference]: Finished difference Result 4850 states and 6653 transitions. [2022-12-14 12:47:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:47:47,008 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 [2022-12-14 12:47:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:47,017 INFO L225 Difference]: With dead ends: 4850 [2022-12-14 12:47:47,017 INFO L226 Difference]: Without dead ends: 4393 [2022-12-14 12:47:47,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:47:47,019 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 185 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:47,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 970 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2022-12-14 12:47:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 4359. [2022-12-14 12:47:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 3357 states have (on average 1.3836759011021746) internal successors, (4645), 3390 states have internal predecessors, (4645), 624 states have call successors, (624), 371 states have call predecessors, (624), 376 states have return successors, (827), 599 states have call predecessors, (827), 623 states have call successors, (827) [2022-12-14 12:47:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6096 transitions. [2022-12-14 12:47:47,310 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6096 transitions. Word has length 113 [2022-12-14 12:47:47,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:47,311 INFO L495 AbstractCegarLoop]: Abstraction has 4359 states and 6096 transitions. [2022-12-14 12:47:47,311 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) [2022-12-14 12:47:47,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6096 transitions. [2022-12-14 12:47:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 12:47:47,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:47,316 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] [2022-12-14 12:47:47,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:47:47,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:47,516 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:47,517 INFO L85 PathProgramCache]: Analyzing trace with hash -827780983, now seen corresponding path program 1 times [2022-12-14 12:47:47,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:47,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14533957] [2022-12-14 12:47:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:47,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:47:48,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:48,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14533957] [2022-12-14 12:47:48,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14533957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:48,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078294075] [2022-12-14 12:47:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:48,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:48,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:48,003 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:48,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:47:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:48,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 12:47:48,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:47:48,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:47:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 12:47:49,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078294075] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:47:49,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [90935771] [2022-12-14 12:47:49,896 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 12:47:49,896 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:47:49,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:47:49,897 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:47:49,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:48:11,577 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 212 for LOIs [2022-12-14 12:48:11,821 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 163 for LOIs [2022-12-14 12:48:11,855 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 154 for LOIs [2022-12-14 12:48:11,890 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2022-12-14 12:48:12,991 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 132 for LOIs [2022-12-14 12:48:13,136 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 78 for LOIs [2022-12-14 12:48:13,256 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 216 for LOIs [2022-12-14 12:48:13,687 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-12-14 12:48:14,234 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:48:38,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124766#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (= ~t4_i~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 12:48:38,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:48:38,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:48:38,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-12-14 12:48:38,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134273683] [2022-12-14 12:48:38,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:48:38,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 12:48:38,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 12:48:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=10763, Unknown=0, NotChecked=0, Total=11556 [2022-12-14 12:48:38,303 INFO L87 Difference]: Start difference. First operand 4359 states and 6096 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) [2022-12-14 12:48:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:53,505 INFO L93 Difference]: Finished difference Result 6870 states and 9012 transitions. [2022-12-14 12:48:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-12-14 12:48:53,506 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 [2022-12-14 12:48:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:53,516 INFO L225 Difference]: With dead ends: 6870 [2022-12-14 12:48:53,517 INFO L226 Difference]: Without dead ends: 6155 [2022-12-14 12:48:53,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44279 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=10080, Invalid=99812, Unknown=0, NotChecked=0, Total=109892 [2022-12-14 12:48:53,529 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 4096 mSDsluCounter, 2630 mSDsCounter, 0 mSdLazyCounter, 7460 mSolverCounterSat, 2361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4096 SdHoareTripleChecker+Valid, 2818 SdHoareTripleChecker+Invalid, 9821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2361 IncrementalHoareTripleChecker+Valid, 7460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:53,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4096 Valid, 2818 Invalid, 9821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2361 Valid, 7460 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 12:48:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6155 states. [2022-12-14 12:48:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6155 to 4635. [2022-12-14 12:48:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4635 states, 3541 states have (on average 1.3713640214628635) internal successors, (4856), 3576 states have internal predecessors, (4856), 669 states have call successors, (669), 408 states have call predecessors, (669), 423 states have return successors, (884), 652 states have call predecessors, (884), 668 states have call successors, (884) [2022-12-14 12:48:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 6409 transitions. [2022-12-14 12:48:53,966 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 6409 transitions. Word has length 114 [2022-12-14 12:48:53,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:53,966 INFO L495 AbstractCegarLoop]: Abstraction has 4635 states and 6409 transitions. [2022-12-14 12:48:53,967 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) [2022-12-14 12:48:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 6409 transitions. [2022-12-14 12:48:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 12:48:53,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:53,972 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] [2022-12-14 12:48:53,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:48:54,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 12:48:54,172 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:54,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:54,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1618643398, now seen corresponding path program 1 times [2022-12-14 12:48:54,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:54,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550577158] [2022-12-14 12:48:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:54,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:48:54,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:54,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550577158] [2022-12-14 12:48:54,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550577158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:54,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718777902] [2022-12-14 12:48:54,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:54,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:54,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:54,375 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:48:54,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:48:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:54,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 12:48:54,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:48:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 12:48:54,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:48:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:48:54,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718777902] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:54,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:48:54,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-12-14 12:48:54,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491809692] [2022-12-14 12:48:54,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:54,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:48:54,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:54,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:48:54,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:48:54,667 INFO L87 Difference]: Start difference. First operand 4635 states and 6409 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) [2022-12-14 12:48:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:55,537 INFO L93 Difference]: Finished difference Result 5959 states and 7957 transitions. [2022-12-14 12:48:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:48:55,538 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 [2022-12-14 12:48:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:55,547 INFO L225 Difference]: With dead ends: 5959 [2022-12-14 12:48:55,547 INFO L226 Difference]: Without dead ends: 4968 [2022-12-14 12:48:55,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-12-14 12:48:55,550 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 316 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:55,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 461 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4968 states. [2022-12-14 12:48:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4968 to 4715. [2022-12-14 12:48:56,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4715 states, 3586 states have (on average 1.368377021751255) internal successors, (4907), 3624 states have internal predecessors, (4907), 688 states have call successors, (688), 417 states have call predecessors, (688), 439 states have return successors, (924), 675 states have call predecessors, (924), 687 states have call successors, (924) [2022-12-14 12:48:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 6519 transitions. [2022-12-14 12:48:56,048 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 6519 transitions. Word has length 115 [2022-12-14 12:48:56,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:56,048 INFO L495 AbstractCegarLoop]: Abstraction has 4715 states and 6519 transitions. [2022-12-14 12:48:56,048 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) [2022-12-14 12:48:56,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 6519 transitions. [2022-12-14 12:48:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 12:48:56,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:56,054 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] [2022-12-14 12:48:56,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 12:48:56,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 12:48:56,255 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:56,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2027643459, now seen corresponding path program 1 times [2022-12-14 12:48:56,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:56,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997848293] [2022-12-14 12:48:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:56,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:48:56,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:56,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997848293] [2022-12-14 12:48:56,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997848293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:56,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122792663] [2022-12-14 12:48:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:56,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:56,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:56,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:48:56,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:48:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:56,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 12:48:56,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:48:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:48:57,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:48:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:48:58,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122792663] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:48:58,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1559467409] [2022-12-14 12:48:58,566 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 12:48:58,566 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:48:58,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:48:58,566 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:48:58,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:49:05,301 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 212 for LOIs [2022-12-14 12:49:05,619 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 161 for LOIs [2022-12-14 12:49:05,651 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 80 for LOIs [2022-12-14 12:49:05,658 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2022-12-14 12:49:06,819 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 132 for LOIs [2022-12-14 12:49:06,966 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 80 for LOIs [2022-12-14 12:49:07,093 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 216 for LOIs [2022-12-14 12:49:07,425 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-12-14 12:49:07,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:49:29,480 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158896#(and (= ~q_req_up~0 1) (= ~E_4~0 2) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~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) (= ~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) (= 0 ~t2_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 12:49:29,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:49:29,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:49:29,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-12-14 12:49:29,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96251615] [2022-12-14 12:49:29,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:49:29,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 12:49:29,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 12:49:29,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=11697, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 12:49:29,482 INFO L87 Difference]: Start difference. First operand 4715 states and 6519 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) [2022-12-14 12:49:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:39,753 INFO L93 Difference]: Finished difference Result 6999 states and 9221 transitions. [2022-12-14 12:49:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-14 12:49:39,753 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 [2022-12-14 12:49:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:39,763 INFO L225 Difference]: With dead ends: 6999 [2022-12-14 12:49:39,764 INFO L226 Difference]: Without dead ends: 5928 [2022-12-14 12:49:39,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26863 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=6757, Invalid=62675, Unknown=0, NotChecked=0, Total=69432 [2022-12-14 12:49:39,769 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 4828 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 7581 mSolverCounterSat, 3634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4828 SdHoareTripleChecker+Valid, 2365 SdHoareTripleChecker+Invalid, 11215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3634 IncrementalHoareTripleChecker+Valid, 7581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:39,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4828 Valid, 2365 Invalid, 11215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3634 Valid, 7581 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 12:49:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5928 states. [2022-12-14 12:49:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5928 to 4531. [2022-12-14 12:49:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4531 states, 3474 states have (on average 1.3756476683937824) internal successors, (4779), 3511 states have internal predecessors, (4779), 648 states have call successors, (648), 385 states have call predecessors, (648), 407 states have return successors, (874), 636 states have call predecessors, (874), 647 states have call successors, (874) [2022-12-14 12:49:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4531 states to 4531 states and 6301 transitions. [2022-12-14 12:49:40,292 INFO L78 Accepts]: Start accepts. Automaton has 4531 states and 6301 transitions. Word has length 124 [2022-12-14 12:49:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:40,292 INFO L495 AbstractCegarLoop]: Abstraction has 4531 states and 6301 transitions. [2022-12-14 12:49:40,293 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) [2022-12-14 12:49:40,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4531 states and 6301 transitions. [2022-12-14 12:49:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 12:49:40,298 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:40,298 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] [2022-12-14 12:49:40,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:49:40,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 12:49:40,499 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:40,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1039480370, now seen corresponding path program 1 times [2022-12-14 12:49:40,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:40,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32472911] [2022-12-14 12:49:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:40,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 12:49:40,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:40,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32472911] [2022-12-14 12:49:40,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32472911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:40,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639048090] [2022-12-14 12:49:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:40,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:40,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:40,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:40,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:49:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:40,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 12:49:40,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 12:49:40,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:49:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:49:40,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639048090] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:40,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:49:40,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-12-14 12:49:40,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216855651] [2022-12-14 12:49:40,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:40,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:49:40,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:49:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:49:40,924 INFO L87 Difference]: Start difference. First operand 4531 states and 6301 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) [2022-12-14 12:49:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:41,944 INFO L93 Difference]: Finished difference Result 5186 states and 7042 transitions. [2022-12-14 12:49:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 12:49:41,945 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 [2022-12-14 12:49:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:41,954 INFO L225 Difference]: With dead ends: 5186 [2022-12-14 12:49:41,954 INFO L226 Difference]: Without dead ends: 4299 [2022-12-14 12:49:41,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:49:41,957 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 457 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:41,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 512 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:49:41,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4299 states. [2022-12-14 12:49:42,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4299 to 4262. [2022-12-14 12:49:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4262 states, 3275 states have (on average 1.3844274809160306) internal successors, (4534), 3312 states have internal predecessors, (4534), 612 states have call successors, (612), 355 states have call predecessors, (612), 373 states have return successors, (833), 596 states have call predecessors, (833), 611 states have call successors, (833) [2022-12-14 12:49:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4262 states to 4262 states and 5979 transitions. [2022-12-14 12:49:42,475 INFO L78 Accepts]: Start accepts. Automaton has 4262 states and 5979 transitions. Word has length 125 [2022-12-14 12:49:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:42,476 INFO L495 AbstractCegarLoop]: Abstraction has 4262 states and 5979 transitions. [2022-12-14 12:49:42,476 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) [2022-12-14 12:49:42,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4262 states and 5979 transitions. [2022-12-14 12:49:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 12:49:42,481 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:42,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:49:42,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 12:49:42,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:42,683 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:42,684 INFO L85 PathProgramCache]: Analyzing trace with hash -967379114, now seen corresponding path program 1 times [2022-12-14 12:49:42,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:42,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701285119] [2022-12-14 12:49:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:42,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 12:49:42,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:42,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701285119] [2022-12-14 12:49:42,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701285119] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:42,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119525655] [2022-12-14 12:49:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:42,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:42,761 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:42,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:49:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:42,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:49:42,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:49:42,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:42,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119525655] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:42,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:42,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 12:49:42,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958072715] [2022-12-14 12:49:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:42,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:49:42,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:42,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:49:42,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:49:42,889 INFO L87 Difference]: Start difference. First operand 4262 states and 5979 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (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) [2022-12-14 12:49:43,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:43,549 INFO L93 Difference]: Finished difference Result 7241 states and 10348 transitions. [2022-12-14 12:49:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:49:43,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (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 123 [2022-12-14 12:49:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:43,559 INFO L225 Difference]: With dead ends: 7241 [2022-12-14 12:49:43,559 INFO L226 Difference]: Without dead ends: 5147 [2022-12-14 12:49:43,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:49:43,564 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 192 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:43,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 234 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:49:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2022-12-14 12:49:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 5147. [2022-12-14 12:49:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5147 states, 4045 states have (on average 1.3567367119901113) internal successors, (5488), 4082 states have internal predecessors, (5488), 649 states have call successors, (649), 432 states have call predecessors, (649), 451 states have return successors, (900), 634 states have call predecessors, (900), 648 states have call successors, (900) [2022-12-14 12:49:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5147 states to 5147 states and 7037 transitions. [2022-12-14 12:49:44,160 INFO L78 Accepts]: Start accepts. Automaton has 5147 states and 7037 transitions. Word has length 123 [2022-12-14 12:49:44,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:44,160 INFO L495 AbstractCegarLoop]: Abstraction has 5147 states and 7037 transitions. [2022-12-14 12:49:44,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (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) [2022-12-14 12:49:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 5147 states and 7037 transitions. [2022-12-14 12:49:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 12:49:44,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:44,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:49:44,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 12:49:44,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:44,368 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:44,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1939053801, now seen corresponding path program 1 times [2022-12-14 12:49:44,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:44,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969639844] [2022-12-14 12:49:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:44,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 12:49:44,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:44,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969639844] [2022-12-14 12:49:44,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969639844] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:44,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653457478] [2022-12-14 12:49:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:44,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:44,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:44,452 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:44,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 12:49:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:44,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:49:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 12:49:44,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:44,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653457478] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:44,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:44,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 12:49:44,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569104585] [2022-12-14 12:49:44,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:44,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:49:44,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:44,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:49:44,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:49:44,553 INFO L87 Difference]: Start difference. First operand 5147 states and 7037 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-12-14 12:49:45,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:45,437 INFO L93 Difference]: Finished difference Result 9096 states and 12799 transitions. [2022-12-14 12:49:45,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:49:45,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 123 [2022-12-14 12:49:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:45,448 INFO L225 Difference]: With dead ends: 9096 [2022-12-14 12:49:45,448 INFO L226 Difference]: Without dead ends: 6832 [2022-12-14 12:49:45,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:49:45,452 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 81 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 463 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 [2022-12-14 12:49:45,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 463 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:49:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2022-12-14 12:49:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 5745. [2022-12-14 12:49:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5745 states, 4587 states have (on average 1.3908872901678657) internal successors, (6380), 4624 states have internal predecessors, (6380), 677 states have call successors, (677), 460 states have call predecessors, (677), 479 states have return successors, (928), 662 states have call predecessors, (928), 676 states have call successors, (928) [2022-12-14 12:49:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5745 states to 5745 states and 7985 transitions. [2022-12-14 12:49:46,101 INFO L78 Accepts]: Start accepts. Automaton has 5745 states and 7985 transitions. Word has length 123 [2022-12-14 12:49:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:46,101 INFO L495 AbstractCegarLoop]: Abstraction has 5745 states and 7985 transitions. [2022-12-14 12:49:46,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-12-14 12:49:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 5745 states and 7985 transitions. [2022-12-14 12:49:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 12:49:46,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:46,108 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:49:46,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 12:49:46,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 12:49:46,309 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash 941120713, now seen corresponding path program 2 times [2022-12-14 12:49:46,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:46,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121739172] [2022-12-14 12:49:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:46,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 12:49:46,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:46,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121739172] [2022-12-14 12:49:46,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121739172] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:46,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904881968] [2022-12-14 12:49:46,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:49:46,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:46,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:46,420 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:46,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 12:49:46,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:49:46,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:49:46,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:49:46,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:49:46,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:46,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904881968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:46,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:46,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:49:46,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066195252] [2022-12-14 12:49:46,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:46,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:49:46,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:46,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:49:46,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:46,529 INFO L87 Difference]: Start difference. First operand 5745 states and 7985 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, (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) [2022-12-14 12:49:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:47,521 INFO L93 Difference]: Finished difference Result 10858 states and 15656 transitions. [2022-12-14 12:49:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:49:47,521 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, (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 123 [2022-12-14 12:49:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:47,538 INFO L225 Difference]: With dead ends: 10858 [2022-12-14 12:49:47,538 INFO L226 Difference]: Without dead ends: 7881 [2022-12-14 12:49:47,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:47,548 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 103 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:47,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 473 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:49:47,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7881 states. [2022-12-14 12:49:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7881 to 7735. [2022-12-14 12:49:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7735 states, 6214 states have (on average 1.3931445123913744) internal successors, (8657), 6259 states have internal predecessors, (8657), 895 states have call successors, (895), 606 states have call predecessors, (895), 624 states have return successors, (1341), 871 states have call predecessors, (1341), 894 states have call successors, (1341) [2022-12-14 12:49:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7735 states to 7735 states and 10893 transitions. [2022-12-14 12:49:48,445 INFO L78 Accepts]: Start accepts. Automaton has 7735 states and 10893 transitions. Word has length 123 [2022-12-14 12:49:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:48,445 INFO L495 AbstractCegarLoop]: Abstraction has 7735 states and 10893 transitions. [2022-12-14 12:49:48,445 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, (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) [2022-12-14 12:49:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 7735 states and 10893 transitions. [2022-12-14 12:49:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 12:49:48,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:48,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:49:48,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 12:49:48,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 12:49:48,652 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:48,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1285038657, now seen corresponding path program 1 times [2022-12-14 12:49:48,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:48,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533231898] [2022-12-14 12:49:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:48,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 12:49:48,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:48,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533231898] [2022-12-14 12:49:48,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533231898] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:48,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824387983] [2022-12-14 12:49:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:48,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:48,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:48,737 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:48,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 12:49:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:48,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:49:48,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 12:49:48,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:48,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824387983] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:48,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:48,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 12:49:48,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146497383] [2022-12-14 12:49:48,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:48,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:49:48,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:48,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:49:48,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:49:48,854 INFO L87 Difference]: Start difference. First operand 7735 states and 10893 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-12-14 12:49:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:50,243 INFO L93 Difference]: Finished difference Result 13698 states and 19834 transitions. [2022-12-14 12:49:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:49:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 120 [2022-12-14 12:49:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:50,261 INFO L225 Difference]: With dead ends: 13698 [2022-12-14 12:49:50,261 INFO L226 Difference]: Without dead ends: 10074 [2022-12-14 12:49:50,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:49:50,268 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 69 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:50,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 453 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:49:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10074 states. [2022-12-14 12:49:51,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10074 to 8937. [2022-12-14 12:49:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8937 states, 7296 states have (on average 1.4280427631578947) internal successors, (10419), 7341 states have internal predecessors, (10419), 955 states have call successors, (955), 666 states have call predecessors, (955), 684 states have return successors, (1401), 931 states have call predecessors, (1401), 954 states have call successors, (1401) [2022-12-14 12:49:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8937 states to 8937 states and 12775 transitions. [2022-12-14 12:49:51,240 INFO L78 Accepts]: Start accepts. Automaton has 8937 states and 12775 transitions. Word has length 120 [2022-12-14 12:49:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:51,240 INFO L495 AbstractCegarLoop]: Abstraction has 8937 states and 12775 transitions. [2022-12-14 12:49:51,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-12-14 12:49:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 8937 states and 12775 transitions. [2022-12-14 12:49:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 12:49:51,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:51,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:49:51,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 12:49:51,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:51,458 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:51,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1328793669, now seen corresponding path program 1 times [2022-12-14 12:49:51,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:51,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138719988] [2022-12-14 12:49:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:51,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 12:49:51,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:51,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138719988] [2022-12-14 12:49:51,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138719988] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:51,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301932710] [2022-12-14 12:49:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:51,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:51,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:51,543 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:51,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 12:49:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:51,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:49:51,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 12:49:51,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:51,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301932710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:51,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:51,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 12:49:51,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2957174] [2022-12-14 12:49:51,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:51,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:49:51,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:51,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:49:51,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:49:51,641 INFO L87 Difference]: Start difference. First operand 8937 states and 12775 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-12-14 12:49:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:53,015 INFO L93 Difference]: Finished difference Result 16148 states and 23580 transitions. [2022-12-14 12:49:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:49:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 120 [2022-12-14 12:49:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:53,037 INFO L225 Difference]: With dead ends: 16148 [2022-12-14 12:49:53,037 INFO L226 Difference]: Without dead ends: 11938 [2022-12-14 12:49:53,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:49:53,045 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 75 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 458 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 [2022-12-14 12:49:53,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 458 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:49:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11938 states. [2022-12-14 12:49:54,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11938 to 10605. [2022-12-14 12:49:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10605 states, 8784 states have (on average 1.4562841530054644) internal successors, (12792), 8829 states have internal predecessors, (12792), 1045 states have call successors, (1045), 756 states have call predecessors, (1045), 774 states have return successors, (1491), 1021 states have call predecessors, (1491), 1044 states have call successors, (1491) [2022-12-14 12:49:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10605 states to 10605 states and 15328 transitions. [2022-12-14 12:49:54,332 INFO L78 Accepts]: Start accepts. Automaton has 10605 states and 15328 transitions. Word has length 120 [2022-12-14 12:49:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:54,332 INFO L495 AbstractCegarLoop]: Abstraction has 10605 states and 15328 transitions. [2022-12-14 12:49:54,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-12-14 12:49:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 10605 states and 15328 transitions. [2022-12-14 12:49:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 12:49:54,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:54,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:49:54,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 12:49:54,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 12:49:54,540 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:54,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1491465599, now seen corresponding path program 2 times [2022-12-14 12:49:54,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:54,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289237213] [2022-12-14 12:49:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:54,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 12:49:54,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:54,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289237213] [2022-12-14 12:49:54,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289237213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:54,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759874956] [2022-12-14 12:49:54,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:49:54,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:54,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:54,663 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:54,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 12:49:54,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:49:54,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:49:54,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:49:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:49:54,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:54,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759874956] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:54,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:54,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:49:54,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637395075] [2022-12-14 12:49:54,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:54,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:49:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:49:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:54,763 INFO L87 Difference]: Start difference. First operand 10605 states and 15328 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:49:56,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:56,015 INFO L93 Difference]: Finished difference Result 16573 states and 24684 transitions. [2022-12-14 12:49:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:49:56,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 120 [2022-12-14 12:49:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:56,032 INFO L225 Difference]: With dead ends: 16573 [2022-12-14 12:49:56,032 INFO L226 Difference]: Without dead ends: 10635 [2022-12-14 12:49:56,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:56,043 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 118 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:56,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 464 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:49:56,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10635 states. [2022-12-14 12:49:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10635 to 10481. [2022-12-14 12:49:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10481 states, 8660 states have (on average 1.4355658198614318) internal successors, (12432), 8705 states have internal predecessors, (12432), 1045 states have call successors, (1045), 756 states have call predecessors, (1045), 774 states have return successors, (1491), 1021 states have call predecessors, (1491), 1044 states have call successors, (1491) [2022-12-14 12:49:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10481 states to 10481 states and 14968 transitions. [2022-12-14 12:49:57,158 INFO L78 Accepts]: Start accepts. Automaton has 10481 states and 14968 transitions. Word has length 120 [2022-12-14 12:49:57,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:57,158 INFO L495 AbstractCegarLoop]: Abstraction has 10481 states and 14968 transitions. [2022-12-14 12:49:57,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:49:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 10481 states and 14968 transitions. [2022-12-14 12:49:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 12:49:57,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:57,165 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:49:57,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 12:49:57,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:57,367 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:57,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:57,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1792154049, now seen corresponding path program 1 times [2022-12-14 12:49:57,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:57,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028545715] [2022-12-14 12:49:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:57,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 12:49:57,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:57,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028545715] [2022-12-14 12:49:57,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028545715] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:57,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093981828] [2022-12-14 12:49:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:57,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:57,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:57,501 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:57,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 12:49:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:49:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 12:49:57,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:57,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093981828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:57,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:57,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:49:57,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677633417] [2022-12-14 12:49:57,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:57,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:49:57,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:57,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:49:57,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:57,612 INFO L87 Difference]: Start difference. First operand 10481 states and 14968 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-12-14 12:49:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:59,407 INFO L93 Difference]: Finished difference Result 24889 states and 36340 transitions. [2022-12-14 12:49:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:49:59,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 120 [2022-12-14 12:49:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:59,432 INFO L225 Difference]: With dead ends: 24889 [2022-12-14 12:49:59,432 INFO L226 Difference]: Without dead ends: 15144 [2022-12-14 12:49:59,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:59,445 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 59 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:59,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 395 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:49:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15144 states. [2022-12-14 12:50:00,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15144 to 12568. [2022-12-14 12:50:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12568 states, 10527 states have (on average 1.4583452075615084) internal successors, (15352), 10573 states have internal predecessors, (15352), 1155 states have call successors, (1155), 866 states have call predecessors, (1155), 884 states have return successors, (1601), 1130 states have call predecessors, (1601), 1154 states have call successors, (1601) [2022-12-14 12:50:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12568 states to 12568 states and 18108 transitions. [2022-12-14 12:50:00,806 INFO L78 Accepts]: Start accepts. Automaton has 12568 states and 18108 transitions. Word has length 120 [2022-12-14 12:50:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:00,806 INFO L495 AbstractCegarLoop]: Abstraction has 12568 states and 18108 transitions. [2022-12-14 12:50:00,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-12-14 12:50:00,807 INFO L276 IsEmpty]: Start isEmpty. Operand 12568 states and 18108 transitions. [2022-12-14 12:50:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 12:50:00,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:00,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:50:00,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 12:50:01,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:01,016 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:01,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1127259902, now seen corresponding path program 1 times [2022-12-14 12:50:01,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:50:01,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979886665] [2022-12-14 12:50:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:01,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:50:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:50:01,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:50:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979886665] [2022-12-14 12:50:01,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979886665] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:50:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097787067] [2022-12-14 12:50:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:01,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:01,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:01,142 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:01,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 12:50:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:50:01,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:50:01,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:50:01,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097787067] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:50:01,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:50:01,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 12:50:01,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956396135] [2022-12-14 12:50:01,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:50:01,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:50:01,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:50:01,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:50:01,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:50:01,292 INFO L87 Difference]: Start difference. First operand 12568 states and 18108 transitions. Second operand has 6 states, 5 states have (on average 15.6) internal successors, (78), 6 states have internal predecessors, (78), 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) [2022-12-14 12:50:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:03,481 INFO L93 Difference]: Finished difference Result 28756 states and 41644 transitions. [2022-12-14 12:50:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:50:03,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 6 states have internal predecessors, (78), 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 121 [2022-12-14 12:50:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:03,510 INFO L225 Difference]: With dead ends: 28756 [2022-12-14 12:50:03,510 INFO L226 Difference]: Without dead ends: 16924 [2022-12-14 12:50:03,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:50:03,525 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 407 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:03,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 450 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:50:03,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16924 states. [2022-12-14 12:50:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16924 to 16922. [2022-12-14 12:50:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16922 states, 14127 states have (on average 1.435690521696043) internal successors, (20282), 14189 states have internal predecessors, (20282), 1592 states have call successors, (1592), 1183 states have call predecessors, (1592), 1201 states have return successors, (2227), 1551 states have call predecessors, (2227), 1591 states have call successors, (2227) [2022-12-14 12:50:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16922 states to 16922 states and 24101 transitions. [2022-12-14 12:50:05,417 INFO L78 Accepts]: Start accepts. Automaton has 16922 states and 24101 transitions. Word has length 121 [2022-12-14 12:50:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:05,417 INFO L495 AbstractCegarLoop]: Abstraction has 16922 states and 24101 transitions. [2022-12-14 12:50:05,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 6 states have internal predecessors, (78), 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) [2022-12-14 12:50:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 16922 states and 24101 transitions. [2022-12-14 12:50:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 12:50:05,428 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:05,429 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:50:05,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 12:50:05,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 12:50:05,630 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:05,631 INFO L85 PathProgramCache]: Analyzing trace with hash 593915175, now seen corresponding path program 1 times [2022-12-14 12:50:05,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:50:05,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349967587] [2022-12-14 12:50:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:05,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:50:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 12:50:05,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:50:05,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349967587] [2022-12-14 12:50:05,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349967587] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:50:05,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563068964] [2022-12-14 12:50:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:05,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:05,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:05,763 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:05,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 12:50:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:50:05,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 12:50:05,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:50:05,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563068964] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:50:05,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:50:05,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 12:50:05,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135966935] [2022-12-14 12:50:05,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:50:05,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:50:05,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:50:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:50:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:50:05,926 INFO L87 Difference]: Start difference. First operand 16922 states and 24101 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2022-12-14 12:50:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:08,569 INFO L93 Difference]: Finished difference Result 37394 states and 53303 transitions. [2022-12-14 12:50:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:50:08,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 121 [2022-12-14 12:50:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:08,602 INFO L225 Difference]: With dead ends: 37394 [2022-12-14 12:50:08,603 INFO L226 Difference]: Without dead ends: 21208 [2022-12-14 12:50:08,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:50:08,621 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 419 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:08,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 459 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:50:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21208 states. [2022-12-14 12:50:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21208 to 21206. [2022-12-14 12:50:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21206 states, 17691 states have (on average 1.40172969306427) internal successors, (24798), 17765 states have internal predecessors, (24798), 2004 states have call successors, (2004), 1491 states have call predecessors, (2004), 1509 states have return successors, (2713), 1951 states have call predecessors, (2713), 2003 states have call successors, (2713) [2022-12-14 12:50:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21206 states to 21206 states and 29515 transitions. [2022-12-14 12:50:11,310 INFO L78 Accepts]: Start accepts. Automaton has 21206 states and 29515 transitions. Word has length 121 [2022-12-14 12:50:11,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:11,310 INFO L495 AbstractCegarLoop]: Abstraction has 21206 states and 29515 transitions. [2022-12-14 12:50:11,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2022-12-14 12:50:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand 21206 states and 29515 transitions. [2022-12-14 12:50:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 12:50:11,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:11,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:50:11,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 12:50:11,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 12:50:11,525 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:11,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:11,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1816217440, now seen corresponding path program 1 times [2022-12-14 12:50:11,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:50:11,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818518162] [2022-12-14 12:50:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:11,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:50:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 12:50:11,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:50:11,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818518162] [2022-12-14 12:50:11,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818518162] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:50:11,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262110553] [2022-12-14 12:50:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:11,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:11,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:11,664 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:11,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 12:50:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:50:11,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 12:50:11,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:50:11,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262110553] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:50:11,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:50:11,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 12:50:11,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456255831] [2022-12-14 12:50:11,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:50:11,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:50:11,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:50:11,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:50:11,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:50:11,792 INFO L87 Difference]: Start difference. First operand 21206 states and 29515 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2022-12-14 12:50:14,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:14,401 INFO L93 Difference]: Finished difference Result 30822 states and 42687 transitions. [2022-12-14 12:50:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:50:14,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 125 [2022-12-14 12:50:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:14,435 INFO L225 Difference]: With dead ends: 30822 [2022-12-14 12:50:14,435 INFO L226 Difference]: Without dead ends: 21976 [2022-12-14 12:50:14,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:50:14,446 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 213 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:14,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 625 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:50:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2022-12-14 12:50:17,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 21599. [2022-12-14 12:50:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21599 states, 18025 states have (on average 1.3981692094313454) internal successors, (25202), 18123 states have internal predecessors, (25202), 2011 states have call successors, (2011), 1495 states have call predecessors, (2011), 1561 states have return successors, (2792), 1982 states have call predecessors, (2792), 2010 states have call successors, (2792) [2022-12-14 12:50:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21599 states to 21599 states and 30005 transitions. [2022-12-14 12:50:17,222 INFO L78 Accepts]: Start accepts. Automaton has 21599 states and 30005 transitions. Word has length 125 [2022-12-14 12:50:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:17,222 INFO L495 AbstractCegarLoop]: Abstraction has 21599 states and 30005 transitions. [2022-12-14 12:50:17,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2022-12-14 12:50:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 21599 states and 30005 transitions. [2022-12-14 12:50:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 12:50:17,235 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:17,235 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:50:17,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 12:50:17,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 12:50:17,437 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:17,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:17,437 INFO L85 PathProgramCache]: Analyzing trace with hash 866384021, now seen corresponding path program 1 times [2022-12-14 12:50:17,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:50:17,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738087155] [2022-12-14 12:50:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:17,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:50:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 12:50:17,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:50:17,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738087155] [2022-12-14 12:50:17,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738087155] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:50:17,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036518797] [2022-12-14 12:50:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:17,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:17,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:17,545 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:17,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 12:50:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:17,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:50:17,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 12:50:17,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:50:17,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036518797] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:50:17,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:50:17,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:50:17,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874424375] [2022-12-14 12:50:17,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:50:17,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:50:17,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:50:17,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:50:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:50:17,649 INFO L87 Difference]: Start difference. First operand 21599 states and 30005 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:50:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:20,070 INFO L93 Difference]: Finished difference Result 30373 states and 42348 transitions. [2022-12-14 12:50:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:50:20,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 126 [2022-12-14 12:50:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:20,102 INFO L225 Difference]: With dead ends: 30373 [2022-12-14 12:50:20,102 INFO L226 Difference]: Without dead ends: 21175 [2022-12-14 12:50:20,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:50:20,114 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 28 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:20,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 391 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:50:20,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21175 states. [2022-12-14 12:50:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21175 to 21175. [2022-12-14 12:50:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21175 states, 17649 states have (on average 1.4000793246076264) internal successors, (24710), 17735 states have internal predecessors, (24710), 2011 states have call successors, (2011), 1495 states have call predecessors, (2011), 1513 states have return successors, (2720), 1946 states have call predecessors, (2720), 2010 states have call successors, (2720) [2022-12-14 12:50:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21175 states to 21175 states and 29441 transitions. [2022-12-14 12:50:22,557 INFO L78 Accepts]: Start accepts. Automaton has 21175 states and 29441 transitions. Word has length 126 [2022-12-14 12:50:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:22,557 INFO L495 AbstractCegarLoop]: Abstraction has 21175 states and 29441 transitions. [2022-12-14 12:50:22,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:50:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 21175 states and 29441 transitions. [2022-12-14 12:50:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 12:50:22,572 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:22,572 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:50:22,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 12:50:22,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:22,773 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:22,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1273441612, now seen corresponding path program 1 times [2022-12-14 12:50:22,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:50:22,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575013822] [2022-12-14 12:50:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:22,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:50:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 12:50:22,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:50:22,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575013822] [2022-12-14 12:50:22,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575013822] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:50:22,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124151927] [2022-12-14 12:50:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:22,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:22,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:22,868 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:22,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 12:50:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:22,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:50:22,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:50:23,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:50:23,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124151927] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:50:23,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:50:23,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 12:50:23,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499454722] [2022-12-14 12:50:23,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:50:23,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:50:23,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:50:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:50:23,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:50:23,009 INFO L87 Difference]: Start difference. First operand 21175 states and 29441 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-12-14 12:50:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:26,697 INFO L93 Difference]: Finished difference Result 49371 states and 68859 transitions. [2022-12-14 12:50:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:50:26,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 126 [2022-12-14 12:50:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:26,752 INFO L225 Difference]: With dead ends: 49371 [2022-12-14 12:50:26,752 INFO L226 Difference]: Without dead ends: 28977 [2022-12-14 12:50:26,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:50:26,776 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 435 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:26,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 442 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:50:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28977 states. [2022-12-14 12:50:30,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28977 to 28975. [2022-12-14 12:50:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28975 states, 24070 states have (on average 1.380099709181554) internal successors, (33219), 24192 states have internal predecessors, (33219), 2810 states have call successors, (2810), 2075 states have call predecessors, (2810), 2093 states have return successors, (3824), 2709 states have call predecessors, (3824), 2809 states have call successors, (3824) [2022-12-14 12:50:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28975 states to 28975 states and 39853 transitions. [2022-12-14 12:50:30,654 INFO L78 Accepts]: Start accepts. Automaton has 28975 states and 39853 transitions. Word has length 126 [2022-12-14 12:50:30,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:30,654 INFO L495 AbstractCegarLoop]: Abstraction has 28975 states and 39853 transitions. [2022-12-14 12:50:30,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-12-14 12:50:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 28975 states and 39853 transitions. [2022-12-14 12:50:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 12:50:30,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:30,682 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:50:30,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 12:50:30,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:30,883 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:30,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:30,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1876120334, now seen corresponding path program 1 times [2022-12-14 12:50:30,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:50:30,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265151146] [2022-12-14 12:50:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:30,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:50:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 12:50:30,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:50:30,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265151146] [2022-12-14 12:50:30,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265151146] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:50:30,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539040020] [2022-12-14 12:50:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:30,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:30,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:30,995 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:30,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 12:50:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:31,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:50:31,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:50:31,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:50:31,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539040020] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:50:31,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:50:31,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 12:50:31,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606701604] [2022-12-14 12:50:31,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:50:31,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:50:31,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:50:31,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:50:31,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:50:31,133 INFO L87 Difference]: Start difference. First operand 28975 states and 39853 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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) [2022-12-14 12:50:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:36,778 INFO L93 Difference]: Finished difference Result 67891 states and 93432 transitions. [2022-12-14 12:50:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:50:36,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 128 [2022-12-14 12:50:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:36,853 INFO L225 Difference]: With dead ends: 67891 [2022-12-14 12:50:36,853 INFO L226 Difference]: Without dead ends: 39697 [2022-12-14 12:50:36,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:50:36,889 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 422 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:36,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 435 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:50:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39697 states. [2022-12-14 12:50:42,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39697 to 39695. [2022-12-14 12:50:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39695 states, 32821 states have (on average 1.356326742024923) internal successors, (44516), 32997 states have internal predecessors, (44516), 3952 states have call successors, (3952), 2902 states have call predecessors, (3952), 2920 states have return successors, (5402), 3797 states have call predecessors, (5402), 3951 states have call successors, (5402) [2022-12-14 12:50:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39695 states to 39695 states and 53870 transitions. [2022-12-14 12:50:42,381 INFO L78 Accepts]: Start accepts. Automaton has 39695 states and 53870 transitions. Word has length 128 [2022-12-14 12:50:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:42,381 INFO L495 AbstractCegarLoop]: Abstraction has 39695 states and 53870 transitions. [2022-12-14 12:50:42,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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) [2022-12-14 12:50:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 39695 states and 53870 transitions. [2022-12-14 12:50:42,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 12:50:42,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:42,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:50:42,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 12:50:42,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 12:50:42,610 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:42,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:42,611 INFO L85 PathProgramCache]: Analyzing trace with hash 436344908, now seen corresponding path program 1 times [2022-12-14 12:50:42,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:50:42,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346961015] [2022-12-14 12:50:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:42,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:50:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 12:50:42,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:50:42,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346961015] [2022-12-14 12:50:42,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346961015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:50:42,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704630046] [2022-12-14 12:50:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:42,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:42,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:42,736 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:42,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 12:50:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:42,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:50:42,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:50:42,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:50:42,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704630046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:50:42,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:50:42,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 12:50:42,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461778920] [2022-12-14 12:50:42,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:50:42,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:50:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:50:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:50:42,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:50:42,861 INFO L87 Difference]: Start difference. First operand 39695 states and 53870 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2022-12-14 12:50:48,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:48,699 INFO L93 Difference]: Finished difference Result 72598 states and 100181 transitions. [2022-12-14 12:50:48,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:50:48,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 130 [2022-12-14 12:50:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:48,792 INFO L225 Difference]: With dead ends: 72598 [2022-12-14 12:50:48,793 INFO L226 Difference]: Without dead ends: 45110 [2022-12-14 12:50:48,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:50:48,835 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 177 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:48,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 244 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:50:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45110 states. [2022-12-14 12:50:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45110 to 44704. [2022-12-14 12:50:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44704 states, 37480 states have (on average 1.3336446104589115) internal successors, (49985), 37656 states have internal predecessors, (49985), 4005 states have call successors, (4005), 3199 states have call predecessors, (4005), 3217 states have return successors, (6014), 3850 states have call predecessors, (6014), 4004 states have call successors, (6014) [2022-12-14 12:50:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44704 states to 44704 states and 60004 transitions. [2022-12-14 12:50:55,068 INFO L78 Accepts]: Start accepts. Automaton has 44704 states and 60004 transitions. Word has length 130 [2022-12-14 12:50:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:55,068 INFO L495 AbstractCegarLoop]: Abstraction has 44704 states and 60004 transitions. [2022-12-14 12:50:55,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2022-12-14 12:50:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 44704 states and 60004 transitions. [2022-12-14 12:50:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 12:50:55,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:55,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:50:55,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-14 12:50:55,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 12:50:55,298 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:55,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:55,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1105429258, now seen corresponding path program 1 times [2022-12-14 12:50:55,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:50:55,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319377994] [2022-12-14 12:50:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:50:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 12:50:55,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:50:55,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319377994] [2022-12-14 12:50:55,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319377994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:50:55,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874632894] [2022-12-14 12:50:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:55,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:55,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:55,368 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:55,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 12:50:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:55,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:50:55,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 12:50:55,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:50:55,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874632894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:50:55,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:50:55,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 12:50:55,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15476068] [2022-12-14 12:50:55,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:50:55,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:50:55,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:50:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:50:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:50:55,486 INFO L87 Difference]: Start difference. First operand 44704 states and 60004 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2022-12-14 12:51:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:01,780 INFO L93 Difference]: Finished difference Result 75509 states and 104055 transitions. [2022-12-14 12:51:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 130 [2022-12-14 12:51:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:01,873 INFO L225 Difference]: With dead ends: 75509 [2022-12-14 12:51:01,873 INFO L226 Difference]: Without dead ends: 44625 [2022-12-14 12:51:01,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:51:01,919 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 102 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:01,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 465 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:51:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44625 states. [2022-12-14 12:51:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44625 to 44128. [2022-12-14 12:51:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44128 states, 36904 states have (on average 1.3100747886407977) internal successors, (48347), 37080 states have internal predecessors, (48347), 4005 states have call successors, (4005), 3199 states have call predecessors, (4005), 3217 states have return successors, (6014), 3850 states have call predecessors, (6014), 4004 states have call successors, (6014) [2022-12-14 12:51:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44128 states to 44128 states and 58366 transitions. [2022-12-14 12:51:07,944 INFO L78 Accepts]: Start accepts. Automaton has 44128 states and 58366 transitions. Word has length 130 [2022-12-14 12:51:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:07,944 INFO L495 AbstractCegarLoop]: Abstraction has 44128 states and 58366 transitions. [2022-12-14 12:51:07,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2022-12-14 12:51:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 44128 states and 58366 transitions. [2022-12-14 12:51:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 12:51:07,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:07,973 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] [2022-12-14 12:51:07,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-14 12:51:08,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:08,175 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:08,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:08,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2006223576, now seen corresponding path program 1 times [2022-12-14 12:51:08,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:08,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599745432] [2022-12-14 12:51:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:08,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 12:51:08,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599745432] [2022-12-14 12:51:08,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599745432] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365845645] [2022-12-14 12:51:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:08,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:08,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:08,321 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:08,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 12:51:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 12:51:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:51:08,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:08,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365845645] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:08,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:08,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 12:51:08,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645624833] [2022-12-14 12:51:08,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:08,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:51:08,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:08,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:51:08,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:08,451 INFO L87 Difference]: Start difference. First operand 44128 states and 58366 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 12:51:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:16,276 INFO L93 Difference]: Finished difference Result 86468 states and 115030 transitions. [2022-12-14 12:51:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:51:16,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 132 [2022-12-14 12:51:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:16,399 INFO L225 Difference]: With dead ends: 86468 [2022-12-14 12:51:16,399 INFO L226 Difference]: Without dead ends: 56367 [2022-12-14 12:51:16,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:51:16,445 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 249 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:16,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 747 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:16,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56367 states. [2022-12-14 12:51:23,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56367 to 52841. [2022-12-14 12:51:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52841 states, 44049 states have (on average 1.2977820154827577) internal successors, (57166), 44198 states have internal predecessors, (57166), 4953 states have call successors, (4953), 3913 states have call predecessors, (4953), 3837 states have return successors, (7679), 4731 states have call predecessors, (7679), 4952 states have call successors, (7679) [2022-12-14 12:51:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52841 states to 52841 states and 69798 transitions. [2022-12-14 12:51:23,945 INFO L78 Accepts]: Start accepts. Automaton has 52841 states and 69798 transitions. Word has length 132 [2022-12-14 12:51:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:23,945 INFO L495 AbstractCegarLoop]: Abstraction has 52841 states and 69798 transitions. [2022-12-14 12:51:23,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 12:51:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 52841 states and 69798 transitions. [2022-12-14 12:51:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 12:51:23,974 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:23,974 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] [2022-12-14 12:51:23,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-14 12:51:24,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 12:51:24,175 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:24,176 INFO L85 PathProgramCache]: Analyzing trace with hash 810086630, now seen corresponding path program 1 times [2022-12-14 12:51:24,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:24,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412155533] [2022-12-14 12:51:24,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:24,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:51:24,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:24,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412155533] [2022-12-14 12:51:24,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412155533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:24,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677335016] [2022-12-14 12:51:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:24,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:24,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:24,413 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:24,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 12:51:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:24,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 12:51:24,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 51 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:51:24,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 12:51:24,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677335016] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:24,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:51:24,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11, 8] total 20 [2022-12-14 12:51:24,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614585377] [2022-12-14 12:51:24,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:24,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:51:24,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:24,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:51:24,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:51:24,912 INFO L87 Difference]: Start difference. First operand 52841 states and 69798 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:51:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:33,905 INFO L93 Difference]: Finished difference Result 106183 states and 141141 transitions. [2022-12-14 12:51:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:51:33,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-12-14 12:51:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:34,035 INFO L225 Difference]: With dead ends: 106183 [2022-12-14 12:51:34,035 INFO L226 Difference]: Without dead ends: 59987 [2022-12-14 12:51:34,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:51:34,107 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 209 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:34,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 436 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:51:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59987 states. [2022-12-14 12:51:42,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59987 to 58794. [2022-12-14 12:51:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58794 states, 49586 states have (on average 1.2803815593110959) internal successors, (63489), 49870 states have internal predecessors, (63489), 4992 states have call successors, (4992), 4141 states have call predecessors, (4992), 4214 states have return successors, (7877), 4784 states have call predecessors, (7877), 4991 states have call successors, (7877) [2022-12-14 12:51:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58794 states to 58794 states and 76358 transitions. [2022-12-14 12:51:42,601 INFO L78 Accepts]: Start accepts. Automaton has 58794 states and 76358 transitions. Word has length 127 [2022-12-14 12:51:42,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:42,601 INFO L495 AbstractCegarLoop]: Abstraction has 58794 states and 76358 transitions. [2022-12-14 12:51:42,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:51:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 58794 states and 76358 transitions. [2022-12-14 12:51:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 12:51:42,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:42,635 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:51:42,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 12:51:42,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:42,836 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:42,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1246083842, now seen corresponding path program 1 times [2022-12-14 12:51:42,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:42,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236442854] [2022-12-14 12:51:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:42,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 12:51:42,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:42,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236442854] [2022-12-14 12:51:42,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236442854] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:42,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886663125] [2022-12-14 12:51:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:42,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:42,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:42,957 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:42,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b9d363-0ca1-40a0-906f-e345f87bc17a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 12:51:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:43,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 12:51:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 68 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:51:43,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 12:51:43,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886663125] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:51:43,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694067296] [2022-12-14 12:51:43,421 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-12-14 12:51:43,421 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:51:43,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:51:43,421 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:51:43,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:52:01,378 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 222 for LOIs [2022-12-14 12:53:09,480 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 870 DAG size of output: 868 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 12:54:37,666 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 144 for LOIs [2022-12-14 12:54:37,723 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 136 for LOIs [2022-12-14 12:54:37,747 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 157 for LOIs [2022-12-14 12:54:39,375 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 74 for LOIs [2022-12-14 12:54:52,035 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 272 for LOIs [2022-12-14 12:56:51,906 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:58:31,088 WARN L233 SmtUtils]: Spent 1.59m on a formula simplification. DAG size of input: 1732 DAG size of output: 1679 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:59:55,361 WARN L233 SmtUtils]: Spent 1.06m on a formula simplification. DAG size of input: 1606 DAG size of output: 1067 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:00:17,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1696725#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ ~local~0 4))) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 13:00:17,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:17,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:17,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 16 [2022-12-14 13:00:17,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685383994] [2022-12-14 13:00:17,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:17,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 13:00:17,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:17,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 13:00:17,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=4374, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 13:00:17,855 INFO L87 Difference]: Start difference. First operand 58794 states and 76358 transitions. Second operand has 16 states, 13 states have (on average 11.384615384615385) internal successors, (148), 14 states have internal predecessors, (148), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30)